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

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 DevOps Engineer

Senior DevOps Engineer

We are searching for an experienced DevOps Engineer to join our infrastructure and automation team, which is responsible for transferring infrastructure to code, automating CI / CD processes, and improving the fault tolerance of our services. First of all, we are looking for a team player who is ready to share his expertise. We have a solid technical team ready to help you grow professionally.

What You Will Be Doing:

Deployment, support, configuration, and optimization of infrastructure;
Centralized management of product segments, staging, development, and testing;
Continuous Integration and Continuous Delivery (CI/CD);
Setting up and support of monitoring systems;
Process automation;
Implementation of best practices and solutions for interaction between developers and the system;
Preparation of technical documentation for implementation;
Help with a migration to AWS.

About You:

At least three years of Linux administration;
Excellent knowledge of network technologies (TCP/UDP, NAT/Firewall/VPN);
Experience with Nginx;
Experience in building highly available and scalable services, understanding of microservice architecture;
Experience with CI/CD tools;
Git version control system;
Containerization/virtualization (Docker);
Knowledge of monitoring and logging tools;
Skilled in the formation of requirements for infrastructure;
Proficient in developing documents describing the deployment of the system;
A very good level of English, at least upper-Intermediate. Fluent Russian is essential.

Nice to have:

Knowledge of Terraform & Ansible;
Experience with infrastructure as a code;
Experience with queue brokers (RabbitMQ);
Experience with SQL and NoSQL databases (MySQL/MariaDB, Redis);
Control of the organization and impact assessment of the measures taken and information protection facilities;
Experience with Kubernetes.

What We Offer:

Competitive compensation according to your skills, experience, and professional accomplishments;
Generous paid vacation, sick leave, and paid holidays;
100% remote work, allowing working and traveling;
Flexible work hours, when it is convenient to plan your working and personal time;
Work in one of the most dynamic and fastest-growing industries;
Ambitious and challenging tasks with a high degree of responsibility and independence;
Multicultural environment;
Supportive, friendly, and professional team, which you can always rely on;
An allowance program for compensation of expenses for fitness activities and the purchase of technical equipment;
Paid training (school, events, conferences).

Senior Scrum Master

Job title: Senior Scrum Master

Seniority: Senior
Work model: Remote
Language: English, Polish

Join our dedicated community as a Senior Scrum Master where innovation, collaboration, and trust are key values. We look forward to having you contribute with us to improving the quality of life for people worldwide through modern solutions for the pharmaceutical industry.

What you'll do

Coordinate Scrum Meetings: Ensure smooth and effective Scrum meetings.
Ensure Adherence to Scrum Principles: Guarantee the team fully embraces and practices Scrum.
Facilitate Communication: Bridge between the development team and Delivery Manager for seamless collaboration.
Remove Impediments: Work closely with the team to eliminate roadblocks and keep the project on track.
Project Status Communication: Keep stakeholders informed about project progress.
Risk Management: Proactively identify and manage project risks, escalating when necessary.

Requirements

Master’s degree in Information Technology, Business, or relevant field, or equivalent experience.
Extensive experience working with virtual/dispersed project teams.
Proficiency in project management methodologies.
Minimum 7 years of experience in software development.
Minimum 5 years of experience in coordinating project teams and managing IT projects of local/global scope.
Exceptional consulting and negotiation skills.
Fluent in English (C1/C2 level).
Essential certifications: PSMI, PSM II, PSM III, AGILE PM, at least one scaled certification (SAFe 4, LeSS Practitioner).

Benefits

Permanent full-time contract adjusted to your preferences.
Ability to work entirely remotely or in one of our cool offices around Poland.
International project environment – challenging and rewarding projects.
Access to private medical services, life insurance, and multisport card.
Access to training and certificate courses (including free access to the Udemy training platform).
Cafeteria Benefits System – vouchers for purchases and services.

What you will do:

Develop and implement machine learning algorithms.
Move machine learning models from development into real-world applications.
Compare different approaches to solving complex business problems.
Collaborate with customers to identify their challenges and explore how machine learning can address them.
Develop algorithms for recommendation and ranking systems.
Build intelligent assistants.
Keep models and language model instructions up to date.

Our expectations:

1.5+ years of relevant experience in startups or professional services firms.
Familiarity with software development and delivery processes and an understanding of their key stages.
Knowledge of machine learning model development and tuning for tasks such as classification, regression, and clustering.
Experience integrating off-the-shelf machine learning solutions.
Experience working with large datasets and data processing systems.
Ability to use data analysis to identify patterns and insights that help solve business problems.
A solid mathematical background and knowledge of core machine learning algorithms and evaluation metrics.
Experience deploying machine learning models to production.
Knowledge of natural language processing (NLP) and large language models (LLMs).
Experience developing agentic systems, including multi-tool and multi-agent solutions.
Strong customer communication and negotiation skills.
Ability to identify customer needs, gather and analyze requirements, and translate business requirements into technical specifications.
Ability to define clear and achievable goals for machine learning tasks and projects.
Ability to conduct customer demos and explain technical concepts and results clearly.
English at B2 level and fluent Russian.
Tech stack: Python, SQL, PostgreSQL, Pandas, FastAPI, Flask, Django, Pydantic, SQLAlchemy, scikit-learn, PyTorch, Transformers, Git, Bitbucket, CI/CD, Docker, OpenAI API, LangChain, LangGraph, LangSmith, Airflow, and BigQuery.

Why join us

At Mad Devs, you will join a company that values creativity, strategic thinking, and continuous improvement. You will work on projects that reach millions of users worldwide, alongside a strong and supportive team. Here, you will grow professionally, take on meaningful challenges, and contribute to products that solve real problems at scale.

Employees benefits

Flexible working hours
Remote-first culture
Long-term projects
Salary in dollars
Professional communities
Onsite business trips
Training budget
Paid conferences

Backend Engineer - Engagement

In This Role, You Will:

Do discovery, 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.
Stay up to date with the latest trends in technology.
Propose new findings during our Get Stuff Done Days (GSDD).

What You Need to Be Successful:

Background & Skills:

Experience in developing software using a JVM language and Spring Boot in large-scale production systems (experience with Kotlin is a plus).
Sound understanding of microservice architecture.
Knowledge of both relational and non-relational databases, preferably Postgres.
Appreciation of working in a modern cloud architecture, preferably with AWS.

Traits:

Strong bias for action, and getting things done.
Ongoing appreciation and consideration for security.
Motivation to write code which is well-tested and well-documented.
Ability to 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.
Access to a Premium subscription on your personal N26 bank account, as well as subscriptions for friends and family members.
An 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, life experiences, and family statuses.
A relocation package with visa support for those who need it.

What you'll do

Sell e-bikes to delivery riders door-to-door, online, and in communities. Build and manage a partner network. Attend interview at a Whizz office in your city.

What you need

Must be authorized to work in the US. No sales experience required. Multilingual skills welcome — English, French, Spanish, Russian, or other languages.

What you get

Flexible schedule, weekly commission payments, bonuses for hitting targets, full training provided, ready-to-use marketing materials, career growth to Senior Partner.

Apply for this position

We'll reach out within one business day to confirm the time and the closest Whizz office.

Weekly payouts — $1,500+/week realistic
Flexible schedule, no fixed hours
Full training and ready-to-use materials
No prior sales experience required

Who you are

Not explicitly separated in content beyond requirements; includes being authorized to work in the US and multilingual capabilities.

Senior Marketing Decision Scientist II

Senior Marketing Decision Scientist II

Overview

Instacart’s Marketing Data Science and Analytics team partners across Marketing, Strategic Finance, and Product to power data-driven growth. As a Senior Marketing Decision Scientist II, you will shape how we measure, forecast, and optimize marketing performance across channels, helping Instacart make smarter investment decisions and accelerate customer acquisition and retention. This is a high-impact, high-visibility role on a small, focused team where you will own complex, zero-to-one measurement initiatives and scale proven solutions. You will collaborate closely with channel marketers, growth leaders, finance partners, and data engineers to deliver models and experimentation frameworks that inform multi-million-dollar decisions. If you thrive in a fast-paced environment that still moves like a startup—and you love rolling up your sleeves to turn ambiguous questions into clear recommendations—this role is for you. You’ll join a tight-knit immediate team of 5 within a broader 9-person marketing data science org, where there is real scope to set the bar for analytical rigor, build systems that last, and influence the roadmap. Come help us go far together by solving complex problems that grow the pie for our customers, retailers, and partners.

About the Job

Own the end-to-end marketing measurement strategy across paid search, paid social, display, affiliates, CTV, and lifecycle/CRM, unifying MMM, MTA, and incrementality testing to guide channel and portfolio-level investment.
Design, launch, and analyze experiments (e.g., geo tests, PSA tests, holdouts) and causal inference studies that quantify lift, inform targeting, and establish best practices for decision-making under uncertainty.
Build and productionize predictive models (e.g., LTV, churn/propensity, audience response, budget allocation) using SQL and Python or R, partnering with data engineering to automate pipelines and ensure data quality.
Create executive-ready dashboards and narratives in tools like Looker or Mode that track KPIs, explain performance drivers, and translate insights into clear, prioritized recommendations.
Partner with Strategic Finance and Marketing leadership on forecasting, scenario planning, and quarterly planning processes; influence roadmaps and present findings to VP+ stakeholders.
Prioritize ruthlessly in a dynamic environment, managing multiple concurrent projects and elevating the team’s analytical bar through peer reviews, documentation, and mentorship.

About You

Minimum Qualifications

6+ years of experience in marketing analytics or data science within technology, e-commerce, marketplace, or consumer subscription businesses.
Advanced proficiency in SQL and in either Python or R for data manipulation, statistical analysis, and modeling.
Hands-on experience designing and analyzing marketing experiments (e.g., A/B tests, geo experiments, holdouts) and applying causal inference techniques to estimate incrementality.
Proven track record implementing at least one marketing measurement approach (e.g., MMM, MTA, or structured incrementality testing) to inform budget allocation for multi-million-dollar programs.
Experience building business-facing dashboards and self-serve tools in Looker, Tableau, or Mode.
Experience working with modern data warehouses (e.g., Snowflake, BigQuery, or Redshift) and version control (Git).
Demonstrated ability to translate ambiguous business questions into analytical roadmaps and to communicate clear, actionable recommendations to non-technical and executive audiences.
Bachelor’s degree in a quantitative field (e.g., Statistics, Economics, Computer Science, Mathematics, Engineering) or equivalent practical experience.

Preferred Qualifications

8+ years of relevant experience; advanced degree (MS/PhD) in a quantitative discipline.
Experience building, validating, and operationalizing Marketing Mix Models (preferably Bayesian approaches using PyMC, Stan, or similar) and triangulating MMM with experiment results.
Familiarity with privacy-conscious measurement (e.g., conversion modeling, SKAN, clean rooms such as Amazon Marketing Cloud or Ads Data Hub) and ad platform APIs.
Experience with analytics engineering and pipeline tooling (e.g., dbt, Airflow) and strong data QA practices.
Background in lifecycle/CRM analytics (e.g., uplift modeling, audience selection, message experimentation) and LTV forecasting.
Exposure to experimentation platforms and feature flagging (e.g., Optimizely or internal frameworks) and to ML applications for bidding, pacing, and creative optimization.
Experience mentoring peers and elevating analytical standards through code reviews, reproducible research, and documentation.

#LI-Remote

Instacart provides highly market-competitive compensation and benefits in each location where our employees work. This role is remote and the base pay range for a successful candidate is dependent on their permanent work location. Please review our Flex First remote work policy here. Currently, we are only hiring in the following provinces: Ontario, Alberta, British Columbia, and Nova Scotia. Offers may vary based on many factors, such as candidate experience and skills required for the role. Additionally, this role is eligible for a new hire equity grant as well as annual refresh grants. Please read more about our benefits offerings here. For Canadian based candidates, the base pay ranges for a successful candidate are listed below. CAN $168,000 — $177,500 CAD

Systems Operations Specialist

Systems Operations Specialist

What You'll Do

Support and maintain our go-to-market systems, including HubSpot, Vitally, and other operational platforms.
Build, maintain, and troubleshoot workflows, automations, lifecycle stages, routing rules, and operational processes.
Investigate and resolve system issues, workflow failures, data inconsistencies, and operational requests from internal teams.
Partner with Sales, Customer Success, Marketing, Finance, and Product to improve business processes and operational efficiency.
Create and maintain dashboards and reporting that provide visibility into pipeline, customer health, renewals, forecasting, and other key business metrics.
Support integrations and data flow between CRM, billing, product, analytics, and customer support systems.
Perform data cleanup, improve CRM hygiene, and help maintain data accuracy across business systems.
Document processes, troubleshooting guides, and operational playbooks to improve scalability and enable self-service.
Identify opportunities to automate repetitive work using workflows, AI tools, and other operational technologies.
Assist with cross-functional operational projects that improve how teams work together and scale.

What Success Looks Like

Business systems operate reliably with minimal disruption.
Internal teams receive timely, effective support for operational questions and system issues.
Data across our go-to-market systems is accurate, consistent, and trusted.
Manual processes are reduced through thoughtful automation and workflow improvements.
Reporting provides leaders with reliable visibility into business performance.
Documentation enables teams to solve common operational issues independently.
Operational processes continue to scale as Nylas grows.