Backend Engineer

xAI xAI · AI Frontier · London, United Kingdom · Infrastructure

Backend Engineer responsible for production systems powering the API, focusing on scalable and reliable distributed systems. Requires expertise in Rust/C++, distributed systems design, observability, and databases. Familiarity with LLM APIs, embeddings, or RAG patterns is preferred.

What you'd actually do

  1. work on xAI's production systems that power the API
  2. designing, implementing, and maintaining reliable and horizontally scalable distributed systems
  3. Knowledge of service observability and reliability best practices
  4. Experience in operating commonly used databases such as PostgreSQL, Clickhouse, and MongoDB

Skills

Required

  • Rust
  • C++
  • distributed systems
  • service observability
  • PostgreSQL
  • Clickhouse
  • MongoDB

Nice to have

  • Python
  • Docker
  • Kubernetes
  • gRPC
  • LLM APIs
  • embeddings
  • RAG patterns

What the JD emphasized

  • Expert knowledge of either Rust or C++