Head of Infrastructure

Build the infrastructure behind the next generation of AI-powered customer communicationsthe company is building an AI-first communication platform where AI agents, human agents, business workflows and communication channels work together seamlessly.

As we enter our next phase of growth, we are looking for a Head of Infrastructure to own and scale the infrastructure foundation behind this platform.

This is a unique opportunity to 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, our 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 today 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.

Our philosophy is simple: we build and operate our infrastructure ourselves. 100% of our production infrastructure is managed by our teams, giving us full technical ownership, deep system knowledge, and the ability to solve complex challenges without relying on external vendors. This allows us to move faster, make better architectural decisions, and build systems tailored to our needs.

Your mission

Your goal is to make infrastructure ready for the next stage of scaling up by building a strong operational foundation across all the 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 improvements.
• Improve capacity planning processes, connecting business growth and infrastructure needs.
• Lead the evolution of our network and telecom infrastructure: topology, connectivity, carrier relationships, routing, redundancy and voice platform performance and reliability.
• Own our on-premise infrastructure operations: data centers, hardware, storage, connectivity and deployment practices.
• Drive scalability and reliability of our stateful infrastructure: PostgreSQL, ClickHouse, Kafka, RabbitMQ, Redis and other critical systems.
• Support the evolution of our 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 not looking for someone who has mastered every infrastructure domain.

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;
• 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;
• 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 infrastructure domains.
• Experience leading technical teams where different groups own different areas of infrastructure (for example networking, SRE, databases, systems or platform engineering).
• Strong hands-on mindset: you stay close to technology, understand technical details 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, both written and spoken. French or other languages are a plus.
• Ability to work onsite in Paris.

Nice to HaveExperience with:

• 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 — infrastructure is complex, and you 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 will directly influence 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, you will solve problems where architecture and engineering decisions matter.

Build something from an early stage of maturity.

You will help establish the operational discipline, processes and team structure needed for the next phase of growth.

Work directly with technical leadership.

You will report directly to Sergey, our CTO, who is deeply involved in infrastructure and technical decisions while giving infrastructure leaders the ownership to drive changes.

Recruitment Process

Intro call with Talent AcquisitionUp to 1h — alignment on experience, expectations and motivation.

Two technical conversations with Sergey, CTOFocused on:

• infrastructure strategy;
• technical depth;
• architecture decisions;
• operational leadership approach.

Meeting with the infrastructure teamOnsite or online session focused on collaboration, problem-solving and engineering culture.

Final conversation with CEO

Logistics

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, enjoy solving ambiguous technical challenges and want to shape a critical engineering domain — we would love to talk.

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