Senior Software Engineer (.NET Performance & Reliability)

Criteo • Paris, Île-de-France, France • Posted May 26, 2026

Location Paris, Île-de-France
Job Type Full-time
Category Computer Occupations
Posted May 26, 2026

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 Software Engineer focused on performance and reliability, you will work closely with product engineering teams to analyze, troubleshoot, and optimize large-scale .NET applications running in production.

Your work will span performance profiling, runtime optimization, reliability engineering, observability, and incident prevention. You will help teams identify bottlenecks, improve application efficiency, and build tooling and frameworks that enhance reliability across the platform.

This role is ideal for engineers who en...

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