What You'll Do:

The Platform Core group at Criteo brings together seven agile, human-sized teams responsible for the foundational systems powering all Criteo products.

Within this organization, the Analytics Infrastructure team builds and operates large-scale, multi-datacenter analytics platforms enabling interactive querying, data exploration, and high-volume processing across internal and external workloads.

You will join a highly skilled engineering environment operating some of Europe’s largest analytical systems, supporting massive datasets and high concurrency across hundreds of applications and services.

As a Senior Site Reliability Engineer, you will:

Build and operate large-scale analytics platforms

• Design, operate, and evolve distributed analytics infrastructure with a strong focus on scalability, resilience, and performance.

• Manage critical data platforms including Vertica, Presto, Druid, Tableau, and related systems.

• Ensure reliability and low-latency access for a broad range of users and services.

Improve automation and platform engineering

• Develop and maintain automation, deployment, and orchestration systems using Chef, Docker, Mesos, and Kubernetes.

• Build internal tooling and operational frameworks primarily in Scala, with opportunities to work in Python or Ruby.

• Enhance self-service capabilities for engineering teams while maintaining strong operational standards.

Drive reliability and operational excellence

• Participate in on-call rotations, incident response, troubleshooting, and root cause analysis.

• Improve observability, automation, capacity planning, and cost/performance optimization.

• Contribute to infrastructure migrations and reliability initiatives, including Kubernetes adoption.

Collaborate and provide technical leadership

• Work closely with product, data, and platform engineering teams.

• Contribute to architectural discussions and help shape the evolution of the platform.

• Share knowledge and improve documentation, onboarding, and operational practices.

Who You Are:

Technical Background

• 5+ years of experience in backend engineering, SRE, or distributed systems roles.

• Strong programming skills in Scala, Java, or another JVM/statically typed language, with scripting experience in Python.

• Deep understanding of distributed systems, including scalability, reliability, concurrency, and performance tuning.

• Experience working with large-scale data or analytics systems, such as query engines, distributed storage, or OLAP databases.

• Familiarity with query optimization, high-concurrency workloads, and data-intensive architectures.

Infrastructure & Systems Engineering

• Strong experience in Linux/Unix environments and production system operations.

• Hands-on experience with containerization and orchestration technologies (Docker, Kubernetes, Mesos).

• Proven ability to build automation, improve reliability, and reduce operational toil.

• Experience with CI/CD pipelines, infrastructure-as-code, and configuration management systems.

• Strong understanding of observability practices (metrics, logging, tracing) in distributed systems.

Collaboration & Ownership

• Ability to work effectively with cross-functional teams, including product engineers and data stakeholders.

• Strong communication skills, with the ability to explain complex system behavior clearly.

• Ownership mindset when operating and improving production systems at scale.

• Willingness to participate in on-call rotations and incident response.

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!​

Who We Are:

We’re Criteo, the Commerce Intelligence Platform. Criteo helps businesses turn shopper signals into commerce outcomes while delivering more relevant experiences for shoppers. We use proprietary commerce intelligence and AI decisioning to drive relevance for shoppers and performance for businesses.

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.

What We Offer: