What You'll Do:
Within the Platform department of R&D, the Product Reliability Engineering (PRE) group acts as the bridge between Product Engineering, Platform Engineering and Infrastructure. The Platform PRE group comprises eight teams helping R&D design, build, and operate large-scale distributed systems reliably and efficiently. The common objective of the PRE teams is to build the most reliable platform in AdTech.
As a Senior Site Reliability Engineer within the PRE-Platform team, you will help Platform teams improve the reliability, scalability, and operability of their services and CI/CD pipelines. You will develop and maintain tooling and libraries (Python, Jenkins, Chef), support observability and performance initiatives, and lead technical migrations across infrastructure and core dependencies. You will also participate in an on-call rotation to help ensure production stability.
What You’ll Do
Own and improve the full lifecycle of production services — from design and deployment to operation and continuous improvement.
Partner with development teams before launch through system design reviews, platform and framework development, capacity planning, and production readiness assessments.
Improve reliability, scalability, and performance by automating operations and driving infrastructure and platform enhancements.
Maintain and optimize live systems through monitoring, observability, performance analysis, and incident management.
Participate in incident response and contribute to a culture of blameless postmortems and continuous learning.
Stack: C#, Java, Scala, Python, Go, Prometheus, Grafana, Kibana, Linux, Kubernetes, Mesos, and more.
Who You Are:
Strong software engineering experience with at least one modern programming language.
5+ years of experience in Site Reliability Engineering, Platform Engineering, Software Engineering, or DevOps roles.
Experience designing, operating, and troubleshooting large-scale distributed systems in production environments.
Solid understanding of systems engineering fundamentals, including compute, networking, storage, and observability.
Hands-on experience debugging production issues, optimizing system performance, and automating operational workflows.
Ability to write clean, maintainable, and reliable code used in production systems and internal platforms.
Strong analytical and problem-solving skills, with the ability to collaborate effectively across engineering teams.
Curiosity, ownership, and a pragmatic mindset toward improving reliability and developer productivity.
Take a look at for access and insight into our engineering culture and achievements.
Senior Site Reliability Engineer (Platform Engineering) • Paris, France
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