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Senior Backend Engineer

RustJobs · Paris · Senior · Hybrid

We’re hiring Intermediate and Senior Backend Rust Engineers to join a fast-growing consumer product company with millions of active users and significant long-term backing.

The engineering team is highly international, deeply technical, and focused on building scalable real-time systems with strong performance and reliability requirements. This is an opportunity to join early, work alongside experienced systems engineers, and help shape core backend infrastructure powering a globally used product.

The Role

You’ll work on backend and infrastructure systems written in Rust, solving problems around scalability, concurrency, distributed systems, and reliability in production.

The team values engineers who enjoy ownership and want to work close to architecture and systems design rather than narrow feature work.

This is a highly collaborative, engineering-driven environment with a strong in-person culture in central Paris.

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What You’ll Work On

Design and build high-performance backend services in Rust
Work on distributed systems handling real-world scale and low-latency workloads
Contribute to architecture, concurrency models, and infrastructure design
Own services end-to-end including observability, debugging, incident response, and reliability
Collaborate across backend, mobile, and platform engineering teams
Help evolve shared systems used across multiple platforms and clients

Requirements

Strong backend or infrastructure engineering background
Production experience with Rust OR deep low-level systems experience in languages such as C++, C, or OCaml
Strong understanding of concurrency, distributed systems, and performance-sensitive applications
Experience operating large-scale systems in production environments
Comfortable taking ownership beyond implementation alone
Strong debugging and problem-solving skills
Interest in architecture, scalability, and reliability engineering

Experience with technologies or concepts such as the following is highly valuable:

Kafka / Redpanda
ScyllaDB / Cassandra
Real-time systems
High-throughput backend infrastructure
Cross-platform shared systems architecture
Async and concurrent systems programming

Ideal Profile

Intermediate to Senior-level engineer
Systems-oriented mindset with strong architectural intuition
Interested in building consumer-facing products at massive scale
Comfortable in fast-moving, high-ownership environments
Motivated by product impact and technical depth
Open to working closely in-person with a collaborative engineering team

Location & Relocation

Full-time on-site in Paris
Relocation support available, including visa assistance and temporary accommodation support
International candidates encouraged to apply