Remote 💻 Development Jobs

Head of Hydrogen Systems

At ZeroAvia, we're pioneering the transition to zero-emission aviation. As a leader in clean aviation technology, we are seeking an experienced Head of Hydrogen Systems to lead the strategy, development, certification and industrialisation of hydrogen fuel cells, aircraft fuel systems, and hydrogen infrastructure that will help transform the future of flight.

This senior leadership role will provide technical and organisational leadership across hydrogen systems engineering, encompassing gaseous and cryogenic hydrogen technologies, controls, safety, integration and certification. The successful candidate will drive technology roadmaps, lead multidisciplinary engineering teams, and ensure the delivery of safe, compliant and commercially viable hydrogen solutions across multiple aerospace programmes.

Key Responsibilities

• Lead the development, validation, certification and delivery of hydrogen fuel cell systems, aircraft hydrogen fuel systems, and ground-based hydrogen storage and refuelling infrastructure.
• Define and execute technical strategies, system architectures and technology roadmaps for hydrogen and fuel cell technologies across multiple programmes.
• Provide technical governance and oversight across systems engineering, controls, safety, integration, verification and validation activities.
• Build, lead and develop high-performing multidisciplinary engineering teams, including workforce planning, capability development and succession planning.
• Manage programme delivery through effective control of resources, budgets, schedules, technical risks and stakeholder expectations.
• Drive certification readiness and regulatory compliance, ensuring adherence to engineering standards, DOA requirements and aerospace safety practices.

Role Requirements

• Degree-qualified in Aerospace, Mechanical, Chemical, Electrical Engineering or a related discipline; Chartered Engineer status and/or a Master's degree desirable.
• Significant engineering leadership experience within aerospace or another highly regulated industry, leading complex system development programmes.
• Strong expertise in hydrogen technologies, including gaseous hydrogen storage and distribution; experience with fuel cell integration and hydrogen infrastructure is advantageous.
• Proven experience with cryogenic systems, safety management and, ideally, liquid hydrogen storage, transfer and conditioning technologies.
• Deep understanding of systems engineering, system integration, requirements management, verification and validation within safety-critical environments.
• Excellent leadership, communication and stakeholder management skills, with experience influencing technical, executive, regulatory and external partners.

Why Join Us?

We want to help you be your best self, at work and at home, that’s why we provide our employees with…

• Private health and dental care – get access to services and support when you need them. Add your family members too.
• Mental health support – enjoy a culture where positive mental health is front of mind with our trained Mental Health First Aiders, Employee Assistance Programmes and wellbeing support.
• Free lunch and healthy snacks – keeping you fuelled up so you can help us deliver the technology of the future
• Sports, games and culture clubs – connect and keep fit with other ZeroAvians by joining one of our clubs – such as, running, cycling, padel, trivia, theatre and gardening.

We also offer:

• Stock options – so you can share in our success.
• 25 days holiday, plus public holidays and additional days awarded for long service – to help you manage your work-life balance.
• Free EV Charging and membership in our EV Club.
• Salary Sacrifice Schemes for EV Club, Curry's Tech and Cycle to Work
• Weekly Spot Bonuses to reward excellence.
• Income Protection and Legal Support for peace of mind.
• Relocation Support to make your move seamless.

Diversity and Inclusion

As an emergent company shaping the aviation industry, we know that diversity fuels success and unlocks potential. We embrace being an equal-opportunity employer and actively seek individuals from diverse backgrounds. We value the multitude of skills, perspectives, and mindsets everyone can bring to the table. We proudly reject discrimination in all forms, including that based on race, religion, color, national origin, sex, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

Senior Backend Software Engineer — Data Migration Platform

Remote

What You’ll Do

• Build an application that connects to external CRM systems used by acquired agencies, extracts relevant data, and prepares it for migration into Dwelly.
• Work with APIs, exports, files, databases and poorly documented legacy systems.
• Design workflows for cleaning, mapping, normalising, deduplicating, and validating complex CRM data before it enters Dwelly's core platform.
• Build safe import flows with retries, audit logs, dry runs, error handling and manual review where needed.
• Work with entities such as landlords, tenants, properties, tenancies, payments and maintenance records.
• Use LLM APIs pragmatically for schema mapping, data classification, entity matching, exception triage and quality checks.
• Own the platform end to end: architecture, implementation, testing, deployment and production support.
• Work closely with engineering, product, operations and integration teams.

What We’re Looking For

• Strong backend engineering experience with Python.
• Strong practical SQL skills.
• Experience with data migration, ETL/ELT, data processing, system integrations or internal tools.
• Production experience with FastAPI, Django, Flask or similar.
• Experience integrating with external APIs and third-party systems.
• Ability to work with messy, inconsistent or poorly documented datasets.
• Good understanding of data modelling, mapping, validation, deduplication and safe import patterns.
• Good understanding of database transactions, data consistency and production data workflows.
• Experience with Linux, Docker and containerised development.
• Practical experience using AI coding tools and/or LLM APIs.
• Strong ownership mindset and ability to deliver independently under ambiguity.
• Clear communication and ability to work closely with non-engineering stakeholders.

Nice to Have

• Experience with CRM systems, property management systems, fintech, payments or operations platforms.
• Experience with fuzzy matching, entity resolution, confidence scoring or duplicate detection.
• Experience building internal tools for operations, integrations or migration workflows.
• Experience with observability, logging, monitoring and CI/CD.
• Experience testing applications against complex or high-volume datasets.
• Experience with typed languages such as Java, C#, C++, Kotlin, Scala or similar.
• Experience using LLMs for schema mapping, data classification, data extraction or workflow automation.

What Success Looks Like

• Newly acquired agencies can be migrated faster and with fewer manual steps.
• CRM data can be extracted, validated and imported in a repeatable way.
• Data quality issues are detected early and handled safely.
• The migration process becomes more automated, auditable and scalable over time.
• Operations and engineering teams have better visibility and control over migration progress.

Compensation & Benefits

• Fully remote role.
• Competitive compensation based on experience and impact.
• Opportunity to work on high-leverage automation systems at the intersection of backend engineering, applied ML, data and real operational workflows.
• Competitive salary with the potential for equity options based on performance, recognising exceptional contributions to our integration success.

What is it like being a Dwell-er?

Feel free to check out Dwelly Core Principles. That’s about what we believe in, how we operate and make decisions.

Our Principles

• Customer obsession rather than competitive focus
• Passion for invention
• Operational excellence
• Long-term thinking

THE ROLE & THE TEAM

The ZEOS Outbound team handles article liquidation and return of articles to merchants. As a Software Engineer, you will join an agile, cross-functional team dedicated to building the high-performance services that power our partner-facing products. We work in an API-first environment where we turn complex business logic into scalable, reliable software.

In this role, you will work alongside Software Engineers and Product Managers to implement new features and evolve our microservice landscape. You will be part of a culture that values technical curiosity and operational responsibility. At ZEOS, we believe in "You Write It, You Run It," meaning you will be involved in the entire lifecycle of your services—from the first line of Java code to monitoring and operating your applications in our cloud environment.

Learn more about our Software engineer team here and how we work together here

WHAT WE’D LOVE YOU TO DO (AND LOVE DOING)

• Develop Robust Services: Build and maintain scalable Microservices using Java and Spring Boot, ensuring your code is clean, well-documented, and performant.
• Design Clean APIs: Contribute to the design and implementation of RESTful services, focusing on creating intuitive interfaces for our customer portals and internal tools.
• Own Your Code: Take responsibility for the full development cycle. You will participate in the design, testing, and deployment of your features using Gradle and our CI/CD pipelines.
• Ensure Operational Health: Participate in the deployment and operation of your services within AWS and Kubernetes, learning to monitor and troubleshoot applications in a production environment.
• Collaborate and Grow: Participate in code reviews and team ceremonies, providing and receiving feedback to help maintain high standards of code quality and technical excellence.
• Think End-to-End: While focusing on the backend, you collaborate closely with frontend engineers and show an interest in Fullstack context to ensure we deliver a seamless experience to our partners.

WE’D LOVE TO MEET YOU IF

• Solid Java Foundation: You have professional experience in Java development and a good understanding of the Spring Boot framework. Knowledge in Kotlin is a plus.
• Event-Driven Systems: You understand how to build asynchronous, event-driven microservices and have experience working with streaming platforms like Nakadi or Apache Kafka.
• Database Know-How: You have practical experience with relational databases, specifically PostgreSQL, and understand how to design clean schemas and write efficient queries.
• Microservices Knowledge: You are familiar with Microservice architectures and have experience working with REST APIs and data handling (e.g., using Jackson).
• Reliable Individual Contributor: You have a proven track record of delivering stable features in an agile environment and taking ownership of your tasks from discovery to delivery.
• Tooling & Automation: You are comfortable using build tools like Gradle and have a strong interest in (or experience with) automated testing and CI/CD workflows.
• Cloud Ready: You are eager to work with AWS and Kubernetes and are excited to embrace the "You Write It, You Run It" mindset.
• Effective Communicator: You possess strong English skills and enjoy solving problems collaboratively in a diverse, international team environment.
• Forward-Thinking Developer: You comfortably use modern AI engineering tools like Codex CLI and Claude Code, have experience exposing and using MCPs, and naturally keep up with current shifts in tech.
• You consistently demonstrate a customer centric approach and start to flag continuous improvements initiatives within your area.

OUR OFFER

Zalando provides a range of benefits, here’s an overview of what you can expect. Ask your Talent Acquisition Partner to learn more about what we offer.

• 27 days of holiday a year to start for full-time employees (+1 day for every calendar year up to 30 days)
• 2 paid volunteering days a year
• Employee shares programme
• 40% off fashion and beauty products sold and shipped by Zalando, 30% off Lounge by Zalando, discounts from external partners
• Relocation assistance available (subject to prior agreement)
• Family services, including counselling and support
• Health and wellbeing options (including Wellhub, formerly Gympass)
• Mental health support and coaching available
• Drive your development through our training platform and biannual peer-to-peer review

Recruiter

Stella Lymperopoulou

What you’ll do

- PhD or equivalent research depth, with a track record of technical mentorship. PhD in CS, Statistics, Math, or Physics. Publications in SIGIR, KDD, NeurIPS, or ICLR, and 5+ years building large-scale recommender systems in AdTech, e-commerce, or social. You’ve owned architectural bets and had accountability for outcomes.

- You set the research direction. You identify the highest-leverage problems at the intersection of generative AI and recommendation, define the multi-quarter research agenda, and align engineering and product leadership. That means owning how Generative Retrieval, Deep Ranking, and Re-ranking evolve across a stack built on 770 million users' behavioral data.

- Deep expertise in PyTorch and large-scale model optimization. Hands-on with high-concurrency optimization, quantization, and distillation — getting large generative models to run under extreme production constraints, not just in research environments.

- You are the company's deepest resource on generative recommendation. You translate SOTA research into systems adjoe can ship, review architectural decisions across teams, and raise the ML quality bar company-wide. When there's a hard bottleneck, you're the first call.

- You grow the teams around you. You mentor senior and mid-level scientists, lead architectural debates, and drive long-horizon investments without needing a roadmap handed to you.

What’s in It for You?

At adjoe, you’re not here to just close JIRA tickets, you’re helping build the infrastructure behind one of the most impactful platforms in adtech. The systems you work on will reach hundreds of millions of users and power billions of decisions every day.

• Go Big. Own projects with impact on 770M users and push adtech boundaries.
• Move Fast. Ship solutions multiple times a day, learn from results, and keep momentum.
• Be Direct. Solve problems openly and collaborate across teams.
• Thrive Together. Grow with a diverse, global team of people from over 40 different countries that learn from each other.
• Have Fun. Celebrate wins, enjoy daily victories, and bring your energy.

Other

🌎 We welcome applications from talent worldwide and provide relocation support to Hamburg, Germany for those ready to join our team.

SAP MM/SD Consultant (with German)

Location: Worldwide

Work Mode: Remote

What we offer

• 89% of projects use the newest SAP technologies and frameworks, e.g., S/4HANA Cloud, BTP, CPI, RAP, CDS, and OData.
• 98% of active development projects, with rare short-term support contracts.
• Expert communities and internal courses.
• Market-based compensation and regular performance reviews.
• Valuable perks to support your growth and well-being.

Requirements

• 3+ years of experience in consulting and delivering full-cycle implementation services for various customers.
• Good understanding of Finance processes and their business value drivers.
• Strong knowledge and experience with SAP MM/SD S/4HANA configurations.
• Knowledge in the integration with the other modules.
• Proficiency in German (B2+) and English (B2+).

What you'll do / Responsibilities

• Lead the design and implementation of SAP S/4HANA solutions in Sourcing & Procurement and Sales (MM, SD).
• Work directly with international clients to align SAP functionality with real-world business needs.
• Facilitate workshops to guide process improvements and solution architecture.
• Configure, test, and deploy integrated systems across procurement and sales processes.
• Ensure smooth knowledge transfer and long-term client self-sufficiency.
• Contribute to pre-sales by crafting solution proposals and showcasing business value.

What You Will Own

People & Teams

• Lead and develop four teams (Java, JavaScript/Go, Python, PHP) totalling ~18 engineers
• Build a culture of technical excellence, accountability, and continuous improvement
• Define hiring plans, conduct performance reviews, and drive career development for your reports
• Manage onboarding and ramp-up of new team members, projects, and libraries into the team's scope

Technical Direction

• Set and enforce standards for CVE analysis, vulnerability assessment, patch backporting, and security release processes across all language ecosystems
• Drive consistency in tooling and workflows across teams (CI/CD pipelines, patch delivery, release processes)
• Evaluate and guide AI-assisted automation for backporting and vulnerability discovery
• Serve as the final technical escalation point for complex or cross-team security issues

Delivery & Operations

• Own SLA compliance across all language platforms
• Align team efforts with client expectations and delivery commitments
• Organise and continuously improve development workflows and engineering processes
• Coordinate internal documentation and ensure it reflects the actual state of each project
• Ensure smooth coordination between language teams and OS, Docker, and platform teams
• Manage scope boundaries and overlap with OS and platform teams, particularly around shared dependencies and cross-ecosystem vulnerabilities

Requirements

Must have:

• Strong background in software development across multiple language ecosystems — at least 6 years of hands-on experience
• 3+ years of engineering leadership experience (Team Lead or Engineering Manager) in a product company
• Proven experience with technical delivery and accountability for team outcomes
• Solid Java experience is required; working knowledge of additional languages such as JavaScript, Go, Python, or PHP is a plus
• Hands-on experience with security research or vulnerability analysis: CVE triage, patch backporting, or similar
• Ability to work effectively in distributed teams and within larger organisational structures
• Strong communication skills — capable of interfacing with stakeholders and meeting external delivery expectations
• Experience building or improving engineering processes from scratch
• Experience with CI/CD systems (GitLab CI, Jenkins) and dependency management tooling (Maven/Gradle, npm, pip, Go modules)
• Upper-intermediate or higher English (written and spoken)

Nice to have:

• Hands-on experience identifying and analysing vulnerabilities in language-ecosystem applications
• Understanding of the security vulnerability lifecycle (CVE, CVSS, CWE, CSAF/VEX)
• Background in open-source security, supply chain security, or ELS-type products
• Experience integrating AI tooling into research or patching workflows
• Knowledge of Docker, Kubernetes, or cloud-native ecosystems

Benefits

What's in it for you?

• A strong focus on professional development with opportunities for learning and growth:
  • Interesting and challenging projects,
  • Mentor and other knowledge-exchange programs;
• Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide;
• Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves to ensure you maintain a healthy work-life balance;
• Compensation for private medical insurance;
• Co-working and gym/sports reimbursement;
• The opportunity to receive a reward for the most innovative idea that the company can patent, fostering a culture of creativity and innovation.

Pre-Sales Engineer

REMOTEPython Java ScriptAI/MLB2 English level fluency

We are looking for a Pre-Sales Engineer to handle hands‑on technical tasks—architecture and setup—while also contributing to presales activities for the US market. You’ll focus on designing, building and supporting solutions across modern web and cloud stacks, occasionally engaging with clients and sales teams to shape technical proposals and discovery. This role offers varied technical challenges, exposure to diverse industries and clients, the chance to influence both project execution and proposal direction, and includes onboarding, ongoing support, and mentorship from an experienced colleague.

What you'll do

• Design architectural solution options and define technical approaches
• Lead project setup and kickoff: run init sessions, configure environments, and provide starter artifacts
• Support and oversee project launches and early iterations
• Provide technical leadership and mentorship: conduct reviews, guide tech‑stack selection, and ensure alignment with presales commitments
• Coordinate across business, development, and delivery teams
• Gather, analyze, and formalize customer requirements; translate business objectives into technical solutions
• Prepare estimates (costs, timelines, team composition), proposals, roadmaps, and presentations
• Participate in presales activities: demos, technical consultations, and RFP/RFI responses
• Identify risks and constraints, and propose mitigation plans.

We'd love to hear from you if you have

• 5–7 years of professional software development experience
• Strong full‑stack background with Python or JavaScript
• Practical experience with AI/ML technologies and model integration
• Proven hands‑on experience delivering end‑to‑end solutions (backend, frontend, and ML/AI integration)
• Systemic thinking and ability to make fast architectural decisions
• Proactive, mature mindset with a passion for cutting‑edge technologies and continuous improvement
• Strong client orientation and excellent communication skills for cross‑functional collaboration
• English — B2 or higher (for client communication and documentation).

Senior Automation QA Engineer

What you'll do

Test Automation: Design, develop, and maintain scalable test automation frameworks and test suites in Python for backend services and data pipelines. Backend & Data Testing: Perform comprehensive functional, integration, and performance testing of backend services, APIs, and data feeds. Release Management: Plan, coordinate, and execute production releases, ensuring zero-downtime and high quality. Process Optimization: Identify bottlenecks in the software development lifecycle (SDLC) and improve QA processes by automating routine tasks and integrating tests into the CI/CD pipeline. Root Cause Analysis: Analyze application logs, system metrics, and data anomalies to troubleshoot, isolate, and diagnose complex issues. Collaboration & Documentation: Work closely with developers, product managers, and data engineers to clarify requirements, refine user stories, and track issues in Jira/Confluence. Data Research: Assist the team in researching complex data discrepancies and data quality issues.

Responsibilities

• Design, develop, and maintain scalable test automation frameworks and test suites in Python for backend services and data pipelines.
• Perform comprehensive functional, integration, and performance testing of backend services, APIs, and data feeds.
• Plan, coordinate, and execute production releases, ensuring zero-downtime and high quality.
• Identify bottlenecks in the SDLC and improve QA processes by automating routine tasks and integrating tests into the CI/CD pipeline.
• Analyze application logs, system metrics, and data anomalies to troubleshoot, isolate, and diagnose complex issues.
• Collaborate with developers, product managers, and data engineers to clarify requirements, refine user stories, and track issues in Jira/Confluence.
• Assist the team in researching complex data discrepancies and data quality issues.

What makes you the perfect fit

• Senior-level QA Expertise: 5+ years of experience in QA with a strong focus on backend testing, test design techniques, and implementing Left-Shift testing methodologies.
• Python Proficiency: Strong programming skills in Python with solid experience in test automation frameworks (e.g., PyTest).
• Data & SQL: Strong knowledge of SQL and experience validating data integrity and processing across databases.
• API Testing: Proficient in testing REST/gRPC APIs using automation tools as well as hands-on tools like curl and Postman.
• Linux & Infrastructure: Comfortable with Linux/Unix environments, command-line tools, and basic shell scripting.
• Observability: Experience working with application logs and monitoring/metrics tools (e.g., Grafana, Prometheus, Zabbix, ELK) to diagnose system behavior.
• AI Tooling: Experience leveraging AI assistants (e.g., GitHub Copilot, ChatGPT) to accelerate test generation and code analysis.
• Soft Skills: Excellent analytical skills, attention to detail, and a proactive mindset towards quality.
• Will be a plus: Experience in finance or trading domain; Familiarity with TradingView as a product; Deep background in Data Testing (ETL pipelines, big data validation); Hands-on experience with cloud platforms, specifically AWS (S3, EC2, CloudWatch, etc.); Experience with CI/CD tools (GitLab CI, Jenkins, or GitHub Actions).

What we offer you

• Flexible working hours and a hybrid work format
• Well-equipped offices for focused and collaborative work
• A global, distributed team of 500+ professionals
• Learning, mentorship, and long-term career growth
• Relocation support and private health insurance
• Performance-based bonuses
• TradingView Premium access
• Regular team events and company-wide meetups
• Join the TradingView team and help us build a product used by millions of traders and investors worldwide

Who you are

Today you are a QA professional with backend testing strength, comfortable in a data-heavy environment, and excited by building robust test automation that scales with large data pipelines and services.

Technical Writer – Middle

SOFTSWISS is looking for a Technical Writer to join our team. In this role you will work on a wide range of user and technical documentation, helping us deliver clear, useful, and well-structured content for internal and external audiences.

What you'll do

• Create, edit, and maintain procedural documentation including but not limited to user guides, how-tos, and tutorials.
• Create, edit, and maintain technical documentation, including API documentation.
• Create release notes.
• Work closely with writers, developers, product owners, business analysts, QA team, and others.

Who you are

• Proficiency in English (C1 or higher).
• Russian at B2 level.
• Minimum of 3+ years of experience in technical documentation.
• Expertise in fintech domain.
• Docs-as-code experience.
• Proven experience in writing user guides in explanatory and procedural styles for multiple audiences.
• Excellent knowledge of Microsoft Style Guide, Google Style Guide, or similar.
• Experience in API writing, familiarity with API documentation tools.
• Experience with Git.
• Experience working with Cursor, VS Code, or similar dev tools.
• Experience in writing release notes.
• Proficiency with managing Confluence content.
• English not lower than C1 and higher.
• Experience in writing and proofreading of content, especially technology-related content.
• Excellent communication skills, both written and verbal.
• Critical thinking.
• Must be a self-motivator who works well independently and in a team environment with little or no direct supervision.
• Ability to influence and communicate effectively with both technical and non-technical people.

Nice to have

• Example of user guides you’ve created.
• Example of APIs that you’ve created.
• Example of release notes that you’ve created.

Main Advantages

• Private health insurance
• Sports benefits
• Comprehensive Mental Health Program
• Free English lessons (online)
• Local language courses
• Paid time off
• Maternity leave support
• Referral program rewards
• Upskilling, internal workshops, and participation in professional conferences and corporate events

Frontend Engineer, Expansion

What you’ll do

• The Expansion pod brings creativity and executional rigor to attracting new prospects and driving conversion, focusing on user journeys, interactive and highly polished tools for users, and building targeted experiences for our global users.
• As a frontend engineer you will reimagine the user experience moments that contribute to acquisition journeys.
• You will build delightful and original interactive tools and resources that attract users.
• You will collaborate deeply across design, engineering, and cross-functional teams and work across teams and tech stacks to create new site capabilities.
• You’ll enable prospective clients to self-select into the right Stripe product lines, bring additional partners into the authoring process while upholding our high quality bar, and directly impact Stripe’s success by marrying data-driven rigor with our deep commitment to craft.

Responsibilities

• Work closely with other engineers, pairing, mentoring, and continually building a culture of excellence
• Build beautiful, best-in-class end-user experiences to solve complex problems
• Utilize, maintain, and extend our design systems
• Integrate our web platform with self-serve authoring and experimentation

Who you are

We’re looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement.

Minimum requirements

• 2+ years of relevant web front-end development or creative technology experience at a tech-forward, product-driven company
• Experience writing clear, elegant code in a team environment
• Excellent verbal and written communication
• Passion for engineering solutions focused around growth hacking & enablement

Preferred qualifications

• A good understanding of the formal elements of design, not just limited to the web and including typography, layout, balance, and proportion
• Experience building highly complex interactive tools, including state management and data fetching
• Proficiency with React, with a focus on interactions, animation, performance, and polish
• Experience with A/B testing, synthetic monitoring, or accessibility testing

Senior Android Developer (f/m/d)

Location: Hamburg

Employment Type: Full time

Location Type: Hybrid

What you’ll do

• Own the core development and optimization of the adjoe Ads SDK (Kotlin & Android Internals), running inside hundreds of publisher apps, ensuring zero tolerance for instability across millions of devices.
• Collaborate with backend teams to design APIs and capture behavioral signals powering 50 billion daily ML predictions; design APIs with backward-compatible changes for thousands of external integrators; work with high-performance networking protocols (gRPC, Protobuf, Wire, OkHTTP).
• Design for minimal footprint to optimize battery and memory usage, ensuring native and fast ad impressions inside third-party apps.
• Monitor, debug, and maintain SDK reliability at scale; use observability and data tools (Sentry, Kibana, AWS: S3, QuickSight, Athena) to turn data into engineering decisions.
• Maintain and improve CI/CD pipelines (Gradle, GitLab CI) to automate testing, building, and packaging of mobile libraries.
• Plus – contribute experience in ad-tech/programmatic advertising (IAB specifications), NDK/JNI (C/C++ interop on Android), or cross-platform iOS development to support the ecosystem.

Who we are looking for

• Kotlin & Android Internals Expertise: 5+ years of Android experience (or 3+ years in SDK/library development) with deep understanding of Android lifecycles, ProGuard/R8, and multithreading.
• High-Performance Network Design: Strong API design background with backward compatibility for external integrators; experience with gRPC, Protobuf, Wire, OkHTTP.
• Resource-Constrained Optimization: Ability to design for minimal footprint, optimize battery and memory usage for code running inside other apps/devices.
• Data-Driven Observability: Experience with Sentry, Kibana, AWS (S3, QuickSight, Athena) to monitor and analyze SDK behavior.
• Build Automation & Delivery: Hands-on experience with Gradle and GitLab CI for automated testing, building, and packaging.
• Plus: AdTech/programmatic advertising experience, NDK/JNI or cross-platform iOS development is valued.

What’s in it for you

• Global team with relocation support to Hamburg, Germany.
• Impactful projects affecting hundreds of millions of users and billions of decisions daily.
• Move fast: ship solutions multiple times a day; learn from results; maintain momentum.
• Direct collaboration across teams; transparent problem-solving.
• Thriving, diverse team from over 40 countries; continuous learning from colleagues.
• Fun environment with daily wins and energy.

Benefits & perks

• Relocation support to Hamburg for eligible candidates.
• Global, diverse team culture.

Senior iOS Developer (Swift/Objective-C) - Remote Position

We're seeking an accomplished Senior iOS Developer to become an integral part of our innovative development team. In this fully remote role, you'll architect, build, and maintain sophisticated iOS applications utilizing Swift and Objective-C. The ideal candidate possesses at least 3 years of hands-on mobile development experience and demonstrates unwavering commitment to crafting exceptional user experiences across Apple's ecosystem.

Key Responsibilities

• Design and develop native iOS applications leveraging Swift 5.9+ and Objective-C frameworks.
• Create clean, maintainable code adhering strictly to SOLID, KISS, and DRY principles.
• Collaborate with cross-functional teams to conceptualize, design, and ship new features.
• Identify performance bottlenecks and resolve bugs to enhance application responsiveness.
• Maintain code quality and organization through meticulous Git version control practices.
• Implement responsive user interfaces that align precisely with design specifications.
• Integrate RESTful APIs and third-party services into mobile applications seamlessly.
• Perform thorough peer code reviews and provide constructive feedback to team members.
• Stay current with the latest iOS development trends, tools, and methodologies.
• Contribute to technical documentation and knowledge sharing within the team.

Required Skills & Qualifications

• 3+ years of professional iOS application development experience with a demonstrable portfolio.
• Strong proficiency in both Swift (5.0+) and Objective-C programming languages.
• Comprehensive understanding of iOS SDK, UIKit, and contemporary iOS features.
• Practical application of SOLID, KISS, and DRY principles in mobile development projects.
• Experience with Git for version control and collaborative development workflows.
• Proficiency with Xcode IDE and iOS simulators for efficient development cycles.
• Knowledge of RESTful APIs and JSON data structure parsing.
• Understanding of concurrent programming paradigms and memory management techniques.
• Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience.
• Excellent problem-solving capabilities coupled with meticulous attention to detail.

Nice to Have

• Experience with SwiftUI for creating modern, fluid user interfaces.
• Familiarity with Core Data frameworks for sophisticated local data persistence.
• Expertise writing comprehensive Unit and UI tests using XCTest framework.
• Understanding and implementation of architectural patterns (MVC, MVVM, VIPER, Clean Swift).
• Experience with dependency managers such as CocoaPods and Swift Package Manager.
• Knowledge of CI/CD pipelines specific to iOS application development.
• App Store submission and review process experience.
• Contributions to open-source projects or personal GitHub repositories.
• Proficiency with Reactive programming paradigms (RxSwift or Combine).
• Understanding of BLE connectivity, push notification systems, and background processing.

Why Join Us

Become part of our forward-thinking team and contribute to innovative projects while enjoying the freedom to work from anywhere across the globe. We foster a collaborative environment where you can expand your technical expertise, work with cutting-edge technologies, and make a substantial impact. Our flexible work arrangements, competitive compensation package, and commitment to professional growth make this an exceptional opportunity for passionate iOS developers seeking to advance their careers in mobile technology.

Senior Software Engineer

Responsibilities:

• Construir y evolucionar software con un enfoque en la creación de funcionalidades de plataforma que otros equipos utilicen en su trabajo.
• Producir una gran cantidad de código de alta calidad para construir APIs escalables, eficientes y seguras.
• Utilizar habilidades de frontend para construir componentes efectivos en React.js que puedan usarse en todo Checkr.
• Diseñar y mejorar la arquitectura de sistema de nuestra plataforma que impulsa los productos de Screening de Checkr.
• Colaborar con ingenieros Staff y Principales para influir y ejecutar nuestros diseños técnicos.
• Comunicarse eficazmente con los ingenieros de todo Checkr que dependen de la funcionalidad que estás construyendo: ¡ellos serán tus clientes principales!
• Redactar documentación clara sobre cómo interactuar con las funcionalidades que construyes, aplicaciones y buenas prácticas de software.
• Implementar pasos en el pipeline de CI/CD y gestionar el control de versiones (Git).
• Mentorear y guiar a otros desarrolladores dentro de la organización de Ingeniería.
• Ayudar a identificar y resolver errores (bugs) complejos.

What you bring:

• Inglés avanzado (escrito y hablado).
• 6+ años de experiencia en desarrollo de software full-stack.
• Dominio de Ruby, JavaScript (React.js), HTML, CSS, protocolos HTTP y Regex.
• Disponibilidad para trabajar híbrido 3x2 en Santiago (oficina ubicada en torre gran costanera).
• Sólida comprensión de fundamentos de Ciencias de la Computación: bases de datos relacionales, estructuras de datos y algoritmos, ORM y APIs REST.
• Sólidas prácticas de desarrollo usando TDD, DDD y programación funcional u orientada a objetos.

Requisitos indispensables:

• Experiencia con bases de datos relacionales y no relacionales (MongoDB, Redis) es deseable.
• Experiencia con microservicios y patrones como Event Sourcing o API Gateways.
• Experiencia con arquitecturas orientadas a eventos (Kafka, RabbitMQ o SQS).
• Experiencia en observabilidad (Datadog, Grafana o Splunk).
• Experiencia en IA (Inteligencia Artificial) es deseable.
• Fuerte sentido de propiedad y capacidad para colaborar con equipo y stakeholders.
• Entusiasmo por aprender, innovar y divertirse; mentalidad de A-player y orientación a la acción.

Lo que ofrecemos:

• Ambiente dinámico y colaborativo; programa de learning and development; compensación competitiva en cash y equity; oportunidades de crecimiento.
• Cobertura médica, dental y de visión 100%.
• Reembolso de hasta $25K para servicios de fertilidad, adopción y planificación parental.
• Política de PTO flexible y estipendio mensual de bienestar.
• Ambiente de oficina con sede en Denver, CO; San Francisco, CA; Nashville, TN; y Santiago, Chile; preferencia por trabajo presencial 3+ días a la semana en oficina.
• Perks de oficina como almuerzo varias veces a la semana, estipendio de transporte y snacks.
• Posibilidad de stipend de reubicación para quienes se muden a una ubicación de hub de Checkr.

Nota de transparencia de pago y ubicación

Backend Engineer - Customer Identity

Department:Tech - Customer Identity

Location: Barcelona

What you’ll do

• Design, develop, test, deploy and maintain software in a thriving environment
• Manage individual project priorities and deliverables whilst working in a team who enjoy knowledge sharing sessions
• Work with international, highly engaged peers.
• Work with people and teams who have a getting things done attitude.

What you need to be successful

• Experience in developing software using Java or Kotlin.

• The ability to work independently.
• Be highly motivated and a fast learner.
• Be a problem solver.

• Full professional proficiency in English.
• Strong call to action and for getting things done.
• Motivation to write code which is well-tested and well-documented.
• Give and receive open, direct and timely feedback.

What’s in it for you

• Accelerate your career growth by joining one of Europe’s most talked about disruptors 🚀.
• Employee benefits that range from a competitive personal development budget, work from home budget, discounts to fitness & wellness memberships, language apps and public transportation.
• As an N26 employee you will have access to a Premium subscription on your personal N26 bank account. As well as subscriptions for friends and family members.
• Additional day of annual leave for each year of service.
• A high degree of autonomy and access to cutting edge technologies - all while working with a friendly team of peers of diverse nationalities, experiences, and backgrounds.
• A relocation package with visa support for those who need it.

SAP MM/SD Consultant

What you’ll do

• Functional SAP experience, including hands-on MM Configuration responsibilities in the following areas:
• Enterprise and Procurement Organization Structure
• Purchase Order Processing
• ATP
• MRP
• Pricing
• Delivery Processing
• Customer Master
• Invoicing and EDI
• Inventory management, etc.

Who you are

• Strong background in logistics and integration processes;
• Minimum 3 full life cycle implementation experience from blue print to go live for SD and/or MM module;
• Proven functional consulting experience with experience in system implementation/migration projects;
• Proven ability to work creatively and analytically in a problem-solving environment;
• Experience with ERP and S/4HANA;
• Experience with Agile/Activate methodologies;
• Excellent client-facing and internal communication skills;
• SAP certification(s) strongly preferred;
• Ability to work independently with minimal supervision;
• Polish and German will be a plus;
• English (written and spoken) upper-intermediate or better.

Requirements

• As listed under “What you’ll do” and “Who you are” above.

Perks and Benefits

• Be part of a multinational team working with industrial leaders on full-cycle projects.
• Access individual employee development plans, certifications, and opportunities to work with cutting-edge technologies.
• Participate in internal meetups, attend professional events, and take company-sponsored English, German, and Polish language courses.
• Expand your knowledge with access to professional literature, with the option to request new books at company expense.

Requirements

Equal to the list in “What you’ll do” and “Who you are.”

About LeverX

We are proud to be an SAP Gold Partner—a global company with 20 years of experience and a track record of successful international projects. We’re about our people, sustainable growth, community support, and continuous learning. We believe in you.

Software Developer | C#/.NET + ReactJS (Full-Stack Web)

Software Web Developer contributes to the development of the cloud/web part of a medical imaging product portfolio (R&D, SW Development). Working as part of a Scrum team, the developer builds the product functionalities defined in the roadmap together with teammates, and stays continuously up to date with the latest development technologies to make the most appropriate choices for the products.

Responsibilities

• Understand functional needs and translate them into development activities
• Develop back-end services hosted in Microsoft Azure Cloud, based on the C# .NET framework
• Develop web applications based on the ReactJS framework
• Interact with MS SQL databases using Entity Framework
• Collaborate with Software Quality Engineers and Product Owners to meet customer needs and quality standards
• Collaborate with the DevOps team to deploy solutions to production environments
• Interact with other Scrum teams based in France and China for broader capability delivery
• Accountable, together with the Scrum team, for the quality of products delivered to end customers (market fit driven by the Product Owner; timelines driven by the Program Manager and facilitated by the Scrum Master)

Skills

• Engineering diploma in computer science
• Experience with C#.NET and ReactJS technologies
• Experience developing back-end services in a Microsoft Azure cloud context
• Knowledge of MS SQL and interaction via Entity Framework
• Knowledge of REST API principles
• Comfortable with English, written and spoken
• Customer focus in every task
• Team player, easy to collaborate with
• Makes technical decisions aligned with customer expectations, timing constraints and code quality

• Experience working in a regulated environment is a plus

Other

• Languages: English: B2 Upper Intermediate
• Seniority: Senior

Responsibilities

• Own and deliver IVVQ activities across aircraft, system, and item levels for the ZA200 fuel cell system
• Develop and maintain V&V, integration, and qualification plans, ensuring alignment with lifecycle and programme schedules
• Plan and execute validation, integration, verification, and DO-160G environmental qualification campaigns
• Authorise test specifications, procedures, execution, and results; lead defect investigation and resolution
• Lead IVVQ reviews and represent IVVQ at design reviews, managing verification risk and stakeholder alignment (customer, regulator, suppliers)
• Collaborate cross-functionally (Airworthiness, Certification, Safety, Test, Design) to deliver compliant IVVQ in line with ARP4754B / ARP4761A

Experience & Qualifications

• Degree in Aerospace, Electrical, Mechanical, or related engineering discipline (Master’s preferred)
• ~6+ years’ systems engineering experience in aerospace, including certified or in-certification programmes
• Strong working knowledge of ARP4754B (essential), with familiarity of ARP4761/A, DO-178C, DO-254
• Proven experience planning and executing system-level IVVQ programmes, including verification strategy, test development, and traceability
• Experience with DO-160G environmental qualification and supplier test oversight (including witnessing and data acceptance)
• Proficiency with requirements tools (e.g., Polarion); experience in propulsion, fuel cell, electric, or emerging aerospace systems advantageous

Why Join Us?

We want to help you be your best self, at work and at home, that’s why we provide our employees with…

• Private health and dental care– get access to services and support when you need them. Add your family members too.
• Mental health support– enjoy a culture where positive mental health is front of mind with our trained Mental Health First Aiders, Employee Assistance Programmes and wellbeing support.
• Free lunch and healthy snacks– keeping you fuelled up so you can help us deliver the technology of the future**
• Sports, games and culture clubs– connect and keep fit with other ZeroAvians by joining one of our clubs – such as, running, cycling, padel, trivia, theatre and gardening.

We also offer:

• Stock options– so you can share in our success.
• 25 days holiday, plus public holidays and additional days awarded for long service
• Free EV Charging and membership in our EV Club.
• Salary Sacrifice Schemes for EV Club, Curry's Tech and Cycle to Work
• Weekly Spot Bonuses to reward excellence.
• Income Protection and Legal Support for peace of mind.
• Relocation Support to make your move seamless.

Diversity and Inclusion

As an emergent company shaping the aviation industry, we know that diversity fuels success and unlocks potential. We embrace being an equal-opportunity employer and actively seek individuals from diverse backgrounds. We value the multitude of skills, perspectives, and mindsets everyone can bring to the table. These experiences ignite creativity, originality, and growth. We proudly reject discrimination in all forms, including that based on race, religion, color, national origin, sex, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

Responsibilities

1. Design and develop backend architecture for business systems, ensuring high availability, high performance, and scalability.
2. Perform service governance and performance tuning in high-concurrency scenarios to continuously improve system stability, throughput, and response efficiency.
3. Develop core services and business modules, including user systems, authentication, authorization, and open API capabilities.
4. Participate in microservices architecture design and implementation, promoting system modularization, service-orientation, and engineering excellence.
5. Troubleshoot production issues, analyze performance, and resolve complex technical problems.
6. Collaborate with product, frontend, QA, and cross-functional teams to ensure high-quality delivery of requirements.
7. Continuously optimize development processes, code quality, and technical solutions to improve maintainability and R&D efficiency.

Qualifications

1. Bachelor's degree or above in Computer Science or a related field.
2. 3-5+ years of Java backend development experience with a solid technical foundation. Outstanding fresh graduates may also be considered.
3. Proficiency in Java core technologies, with a deep understanding of JVM, concurrency programming, collection frameworks, I/O, and network communication.
4. Familiarity with mainstream frameworks like Spring Boot and Spring Cloud, with experience in microservices development and governance.
5. Experience in developing high-performance, high-concurrency systems, with familiarity in caching, asynchronous processing, rate limiting, circuit breaking, and thread pools.
6. Proficiency in common middleware such as MySQL, Redis, Kafka, and Elasticsearch, with an understanding of their use cases and performance optimization methods.
7. Understanding of common distributed system issues and solutions, including idempotency, consistency, distributed locks, transaction processing, and service fault tolerance.
8. Strong analytical and problem-solving skills, capable of independently troubleshooting production issues and resolving complex problems.
9. Familiarity with authentication and authorization mechanisms, with experience designing and developing with OAuth2, JWT, SSO, RBAC, and Session.
10. Experience with Kubernetes, including containerized deployment, service orchestration, auto-scaling, and configuration management.
11. Experience with AWS cloud services is a plus.
12. Strong coding standards, documentation skills, and teamwork abilities.

What you'll do

See responsibilities above.

Who you are

See qualifications above.

Tech stack

• Java
• Spring Boot, Spring Cloud
• MySQL, Redis, Kafka, Elasticsearch
• Kubernetes
• AWS

Team description

Cross-functional collaboration with product, frontend, QA, and other teams to deliver high-quality backend services and microservices.

Benefits & perks

Not specified in provided content.

AI Ruby on Rails Engineer

European, the Middle East or African working hours

Apply now

What you’ll be working on:

• Designing and building AI/LLM-assisted product features
• Integrating LLM APIs into Ruby on Rails systems
• Combining AI approaches with business logic, tests, fallbacks, and production safeguards
• Owning features from technical design to production
• Improving reliability, accuracy, consistency, latency, cost, security, and maintainability
• Writing and maintaining automated tests, including unit, integration, and E2E tests
• Debugging production issues and improving system behavior over time

What we’re looking for:

• Practical experience building with AI/LLM technologies, not just using AI tools casually
• Strong Ruby on Rails experience, ideally at a senior level
• Good judgment about when AI is useful and when simpler engineering is better
• Strong backend skills, including databases, API design, performance, background jobs, and security
• Ability to break down ambiguous problems into clear technical solutions

Why Join OTGS?

• Stable & self-funded: Founded in 2007, profitable, and independent.
• Industry leaders: Creators of WPML, the #1 multilingual plugin for WordPress, used on 1.5M+ sites
• Fully remote, async-friendly: Work from anywhere within EMEA hours
• Engineering-driven culture: Ownership, autonomy, testing, and thoughtful problem-solving
• Fair compensation and great benefits: Designed to support your well-being both inside and outside of work.

Want to make a lasting impact on a product used by thousands of real customers? We would love to hear from you.

Senior Gameplay Engineer

Playground Games is looking for a Senior Gameplay Engineer to join our Fable team on a permanent basis.

What you’ll do

• Provide guidance and mentoring to the gameplay engineering team.
• Own significant gameplay and engine features within our custom, proprietary engine.
• Work closely with other teams, providing reliable and effective workflows, empowering them through our technology.
• Become a key collaborator who can work effectively within a large multi-disciplined team.

What you’ll bring

• 5 years of Gameplay Engineering experience, with demonstrable work on at least one published title.
• Strong C++ experience.
• Experience working with proprietary engines is a plus.
• Excellent task planning and delivery mindset.
• A genuine passion for video games.

About us

Playground Games is looking for a Senior Gameplay Engineer to join our Fable team on a permanent basis.

About the role

As a Senior Gameplay Engineer, you will play a crucial role within the gameplay engineering team, promoting good practices, mentoring other engineers, and guiding the delivery of high-quality systems that are performant and scalable. You will work with the design teams to understand and deliver game features, game systems, and mechanics. You will work with the lead engineer to establish high-level goals for the team, and directly with the dev team to plan and deliver gameplay features. Our ideal candidate is an expert Gameplay Engineer who is passionate about their craft, autonomous, skilled in C++, and has a proven track record in games development.

Location and benefits

This is a permanent role based at our state-of-the-art facilities in Royal Leamington Spa, with a hybrid work model in place. Relocation assistance is available if required.

Who you are

Strong candidate with a genuine passion for video games, capable of mentoring others and driving features from concept to delivery within a large team.

Playground Games is proud to be an equal opportunity employer, we believe that diversity and inclusion fuels creativity. We are dedicated to creating a safe, comfortable and welcoming working environment. We strive to build an inclusive culture that encourages, supports and celebrates the diverse voices of our team members. It drives our innovation and connects us closer to our players. We are committed to equity, diversity, and inclusion across age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex and sexual orientation.

At Playground Games we recognise the importance of self-development, career progression, well-being and retention of our colleagues. We celebrate difference and welcome everyone to join us and to be themselves at work.

If you require any reasonable accommodation to apply for this position, please contact us on recruitment@playground-games.com