Backend Rust Engineer for AI Safety at Scale

White Circle is seeking a Product Engineer (Backend - Rust) to own and evolve the core AI safety systems, building APIs that handle hundreds of millions of requests and real-time policy enforcement.

You will design and ship backend services in Rust, own features end-to-end from API design to database schema, and collaborate with product and research. The role offers a hybrid work model in Paris with relocation support and strong equity.