Backend Engineer xAI · United Kingdom Mid posted 1 month ago

Rustify; United Kingdom; On-site; GBP 65,000 - 100,000; Full time

Job summary

xAI, based in the United Kingdom, is seeking a Backend Engineer to contribute to scalable production systems powering grok.com and its API. The role emphasizes building reliable infrastructure, with a focus on Rust, or C++, and strong collaboration with teammates to address pain points and improve performance.

The ideal candidate will have expertise in Rust or C++, experience with distributed systems, and familiarity with observability and reliability practices.

Qualifications

• Expert knowledge of Rust or C++ is required.
• Experience designing and maintaining reliable, horizontally scalable distributed systems.
• Knowledge of service observability and reliability best practices.

Responsibilities

• Work on production systems powering grok.com and the API.
• Contribute to building scalable backend infrastructure in Rust/C++.
• Collaborate with teammates to resolve performance and reliability issues.

Skills

Rust

C++

Distributed systems

Observability

Job description

# Backend EngineerxAI · United Kingdom · Mid · OnsiteView & Apply## About xAIxAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. 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. They should be able to concisely and accurately share knowledge with their teammates.## About the teamIn this role you will work on xAI's production systems that power grok.com and the API. The actual team matching will happen at the offer stage.## About the RoleAs an ideal candidate you have a good understanding of how highly scalable and reliable production infrastructure is built. You strive for perfection and listen carefully to your users in order to solve any pain points they might experience. Most of our backend infrastructure is written in Rust. So familiarity with a compiled language such as C++, Rust, or Go is highly beneficial.## 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,