Head of Infrastructure

Overview

Diabolocom is building an AI-first communication platform where AI agents, human agents, business workflows and communication channels work together seamlessly. As the company enters its next phase of growth, we are looking for a Head of Infrastructure to own and scale the infrastructure foundation behind this platform. You will lead an infrastructure organization combining carrier-grade voice systems, on-premise data centers, distributed systems and AI workloads, while building the operational maturity required to support 2x growth.

You will report directly to Sergei, the CTO, and lead the infrastructure organization: owning operational excellence, team development and execution of infrastructure initiatives, while actively contributing to technical strategy and architecture decisions.

Why this role is different

Most infrastructure leadership roles focus on managing cloud platforms and abstracted services. Here, you will own the foundations of a real-time, AI-first communication platform, from hardware and networks to telecom systems, distributed services and operational processes. 100% of production infrastructure is managed by our own teams, giving full technical ownership and deep system knowledge.

You will work across:

• Telecom infrastructure: a global voice carrier powering real-time communications across multiple markets, with carrier relationships, routing decisions and voice traffic flows managed end-to-end.
• On-premise infrastructure: around 95% of production runs on our own hardware across several data centers around the Paris and Frankfurt areas.
• Cloud infrastructure: used strategically for remote locations and specific workloads, particularly smaller-scale deployments.
• Stateful systems: PostgreSQL, ClickHouse, Kafka, RabbitMQ, Redis and others powering high-volume workloads.
• Distributed systems: fully redundant deployment across multiple data centers, able to sustain the loss of a data center without impacting workloads.
• AI infrastructure: GPU workloads and compute infrastructure supporting AI capabilities.
• Storage: Ceph as the main object and volume storage layer.

This is infrastructure engineering where reliability, latency, scalability and operational excellence directly impact the product. You will help shape the architecture, processes and team structure required for the next stage of growth.

Your mission

Make infrastructure ready for the next stage of scaling by building a strong operational foundation across all infrastructure domains. You will:

• Own infrastructure reliability and operations across the whole stack: incident management, monitoring, alerting, post-mortems and prevention of recurring failures.
• Improve operational visibility across infrastructure teams: identify bottlenecks, improve processes and drive continuous improvement.
• Improve capacity planning, connecting business growth and infrastructure needs.
• Lead the evolution of network and telecom infrastructure: topology, connectivity, carrier relationships, routing, redundancy and voice platform performance and reliability.
• Own on-premise infrastructure operations: data centers, hardware, storage, connectivity and deployment practices.
• Drive scalability and reliability of stateful infrastructure: PostgreSQL, ClickHouse, Kafka, RabbitMQ, Redis and other critical systems.
• Support the evolution of AI infrastructure, including GPU workloads and compute clusters.
• Drive infrastructure improvements with automation, observability and tooling.
• Partner with engineering teams to ensure applications run reliably on our platforms.
• Lead and grow the Infrastructure team across Networking, SRE, Stateful Systems, Voice and Data Center squads.

Who we are looking for

We are looking for a strong infrastructure engineer and leader who has built complex systems, understands operational excellence and wants broader ownership. You might be a Head of Infrastructure looking for a more hands-on technical challenge; an Infrastructure Manager who still enjoys engineering; a Staff/Principal SRE who has been leading infrastructure beyond their formal title; or a network or systems engineer who grew into technical leadership.

Must have

• Deep expertise in at least 2–3 infrastructure domains, such as networking, SRE/reliability, database administration, telecom/voice infrastructure, or hardware/on-premise infrastructure.
• Proven experience building and improving infrastructure operations: establishing processes, improving reliability practices, driving incident management and creating effective ways of working across multiple domains.
• Experience leading technical teams where different groups own different areas of infrastructure (e.g. networking, SRE, databases, systems or platform engineering).
• Strong hands-on mindset: you stay close to technology and lead through context and expertise.
• Self-taught, hands-on background: you have grown technically by solving complex problems beyond your formal role.
• Fluent English, written and spoken. French or other languages are a plus.
• Ability to work onsite in Paris.

Nice to have

• Telecom or carrier infrastructure.
• Voice platforms or real-time communication systems.
• PostgreSQL, Kafka, RabbitMQ or Redis operational experience at scale.
• Dark fiber, peering and advanced networking.
• Kubernetes in production.
• GPU infrastructure.
• Incident command and post-mortem culture.

About you

• You are motivated by complexity and ownership, not titles.
• You solve problems before being asked.
• You are comfortable with ambiguity and know how to make pragmatic technical trade-offs.
• You enjoy building teams and scaling impact through people, not only systems.
• You stay curious about networking, hardware trends, observability and modern infrastructure practices.

Why join us

• Own infrastructure decisions with real business impact: your work directly influences reliability, customer experience and engineering velocity.
• Work on infrastructure that cannot simply be outsourced: from telecom networks and hardware to distributed systems and AI workloads.
• Build from an early stage of maturity: help establish the operational discipline, processes and team structure for the next phase of growth.
• Work directly with technical leadership: you will report to the CTO, who is deeply involved in infrastructure and technical decisions while giving leaders ownership to drive change.

Recruitment process

1. Intro call with Talent Acquisition (up to 1h): alignment on experience, expectations and motivation.
2. Two technical conversations with the CTO: infrastructure strategy, technical depth, architecture decisions and operational leadership approach.
3. Meeting with the infrastructure team (onsite or online): collaboration, problem-solving and engineering culture.
4. Final conversation with the CEO.

Logistics and benefits

• Location: Paris, France
• Hybrid model: minimum 3 days/week onsite
• Equipment: choose your preferred setup (Mac/Linux + monitors)
• Lunch vouchers
• Navigo: 50% of the monthly pass reimbursed
• Relocation support available

One more thing

We are not necessarily looking for someone who has already done this exact role in this exact environment. The strongest candidates are often engineers who grew into leadership by taking ownership, solving complex problems and going beyond their formal responsibilities. If you have built and operated complex infrastructure and want to shape a critical engineering domain, we would love to talk.