Site Reliability Engineer

The Platform Core group at Criteo is composed of seven agile, human-sized teams providing the foundational platform and systems powering all Criteo products.

Within this group, the Analytics Infrastructure team builds and operates the distributed, multi-datacenter analytic data stores and platforms enabling interactive querying, exploration, and large-scale data processing for internal and external use cases.

You will join a highly skilled engineering environment managing some of the largest analytical systems in Europe, supporting massive data volumes and high concurrency across hundreds of services and applications.

As a Senior Site Reliability Engineer (SRE) in the Platform Core Analytics Infrastructure team, you will:

Design, Build & Operate Large-Scale Analytics Infrastructure

• Design, build, and evolve multi-datacenter, large-scale analytic systems focusing on performance, scalability, and resilience.
• Lead the creation of a new real-time analytics platform, working closely with a growing team of experts.
• Operate and improve core analytical data stores: Vertica, Presto, Druid, Tableau, and related systems.
• Ensure high reliability and low latency for systems accessed by diverse internal and external clients.

Automation, Tooling & Platform Engineering

• Build and maintain automation stacks end-to-end using tools such as Chef, Mesos, Docker, Kubernetes.
• Develop internal management, deployment, and monitoring tools, primarily in Scala, with opportunities to use Python or Ruby.
• Enhance self-service capabilities to empower engineering teams while maintaining high operational standards.

Reliability, Incident Ownership & Continuous Improvement

• Own the full lifecycle of reliability: monitoring, troubleshooting, on-call rotation, incident management, root cause analysis, and long-term fixes.
• Define and implement best practices for observability, automation, SLIs/SLOs, capacity management, and cost/performance optimization.
• Drive technical innovation, migrations (including to Kubernetes), and reliability improvements across platform components.

Collaboration & Technical Leadership

• Partner with product teams, data stakeholders, and platform engineers to ensure consistency, usability, and performance.
• Share technical vision, contribute architectural proposals, and influence system evolution across the organization.
• Document processes and systems extensively to improve onboarding and daily operations.

Technical Background

• Master's or PhD in Computer Science (or equivalent experience).
• 5+ years in backend engineering, SRE, DevOps, or distributed systems.
• Strong coding skills in Scala, Java, or another statically typed language; scripting experience in Python or Ruby.
• Deep understanding of distributed systems: design, tuning, scalability, reliability.
• Experience with analytic databases and concepts such as query optimization, concurrent data access, and large-scale storage.

Infrastructure & Operations Skills

• Solid experience with Linux/UNIX environments.
• Hands-on knowledge of container technologies (Docker, Kubernetes) and orchestration systems (Mesos).
• Strong SRE mindset: passion for automation, observability, reliability, documentation, and reducing toil.
• Familiarity with CI/CD pipelines, configuration management, and infra-as-code.

Soft Skills

• Excellent communicator, able to explain complex systems clearly and collaboratively.
• Team player with a proactive mindset.
• Comfortable working in high-scale environments and taking ownership of complex problems.
• Willingness to join the team's on-call rotation.

Take a look at our R&D blog on Medium for access and insight into our engineering culture and achievements.

We understand that you might not meet each of the outlined requirements listed above or may have experience that is a little different from our specifications. If you think that you can still bring value to the role, we want to hear from you.

We acknowledge that many candidates may not meet every single role requirement listed above. If your experience looks a little different from our requirements but you believe that you can still bring value to the role, we'd love to see your application

Criteo is a leader in commerce media, helping brands, agencies, and publishers create meaningful consumer connections through AI-powered advertising solutions. We're shaping a more open and sustainable digital future for advertising.

At Criteo, our culture is as unique as it is diverse. From our offices across the globe or from the comfort of home, our 3,600 Criteos collaborate together to build an open, impactful, and forward-thinking environment.

We foster a workplace where everyone is valued, and employment decisions are based solely on skills, qualifications, and business needs—never on non-job-related factors or legally protected characteristics.

Ways of working – Our hybrid model blends home with in-office experiences, making space for both.

Grow with us – Learning, mentorship & career development programs.

Your wellbeing matters – Health benefits, wellness perks & mental health support.

A team that cares – Diverse, inclusive, and globally connected.

Fair pay & perks – Attractive salary, with performance-based rewards and family-friendly policies, plus the potential for equity depending on role and level.

Additional benefits may vary depending on the country where you work and the nature of your employment with Criteo.