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Rust/C++ Backend Engineer - grok.com & API

Xai

$180,000 - $440,000
Oct 9, 2025
Palo Alto, CA, US
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xAI is looking for engineers to work on the backend services that power grok.com and its API, focusing on highly scalable and reliable services that can efficiently process tens of thousands of queries per second.

Requirements

  • Expert knowledge of either Rust or C++
  • Experience in designing, implementing, and maintaining reliable and horizontally scalable distributed systems
  • Knowledge of service observability and reliability best practices
  • Experience in operating commonly used databases such as PostgreSQL, Clickhouse, and CockroachDB
  • Expert knowledge of Python
  • Experience with Docker, Kubernetes, and containerised applications
  • Expert knowledge of gRPC (unary, response streaming, bi-directional streaming, REST mapping)

Responsibilities

  • Work on the backend services that power grok.com and our API.
  • Writing highly scalable and reliable services that can efficiently process tens of thousands of queries per second.
  • Designing, implementing, and maintaining reliable and horizontally scalable distributed systems.
  • Service observability and reliability best practices.
  • Operating commonly used databases such as PostgreSQL, Clickhouse, and CockroachDB.

Other

  • All employees are expected to be hands-on and to contribute directly to the company’s mission.
  • Leadership is given to those who show initiative and consistently deliver excellence.
  • Work ethic and strong prioritization skills are important.
  • All engineers are expected to have strong communication skills.
  • Candidates joining the London team must be willing to attend late meetings at least once a week to coordinate with the rest of our team.