Backend Engineer | Rust

Department: AI Safety Infrastructure

Location: Paris

Employment Type: FullTime

We’re hiring a Backend Engineer (Rust) for a fast-growing AI infrastructure startup building the safety and control layer for large-scale AI systems.

The Company Behind the Role:

• AI-native product company operating in the AI safety & infrastructure space

• Backed by international investors

• Processing large-scale AI traffic across enterprise environments

• Training and fine-tuning proprietary models for performance & reliability

• Small, highly technical team shipping fast

The company builds the control and evaluation layer for AI systems - helping organizations define, test, and enforce how AI behaves in real-world environments.

Your Impact:

• Design and build Rust backend services powering real-time policy enforcement

• Own features end-to-end - API design, database schema, deployment, monitoring

• Build high-throughput data pipelines handling massive AI traffic

• Improve system performance, reliability, and observability

• Work across the stack when needed — solving problems over protecting boundaries

• Collaborate closely with product, research, and ML teams

• This is a hands-on role where infrastructure directly shapes how AI behaves in production.

Tech Environment (High-Level):

• Async Rust (Tokio)

• Modern web frameworks (Axum / Actix)

• PostgreSQL at scale

• Caching & event streaming architectures

• High-throughput distributed systems

• Production observability & performance tuning

  (Deep technical stack shared during interviews)

Your Superpower:

• Production experience building backend systems in Rust

• Strong async programming and concurrency fundamentals

• Solid system design skills - scaling, failure modes, trade-offs

• Experience with PostgreSQL performance tuning and schema design

• Experience shipping and operating services in production

• Strong communication and ownership mindset

Bonus Points If:

• Experience with ClickHouse, Redis, Kafka

• Kubernetes and infrastructure-as-code (Terraform, Helm)

• Background in fintech, monitoring, or high-throughput systems

• Interest in AI infrastructure / AI safety

Why Join:

• Competitive compensation + equity

• Hybrid setup in Europe + relocation support

• Comprehensive health coverage

• Top-tier hardware & tools

• Team off-sites

• Budget for learning & AI tooling