Role at a glance
Member of Technical Staff - Sandbox Service at xAI — London, UK. Staff-level research role on the Infrastructure team.
- →Based in London, UK
- →Infrastructure team
Skills & technologies
pythonnodegorustc++ragreinforcement learningfine-tuningscala
Full job description
As published by xAI on their official careers page.
ABOUT xAI
xAI’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 employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.
ABOUT THE ROLE:
The Sandbox service team at xAI builds and maintains a secure, scalable system that gives our models safe, controlled access to computational environments. This infrastructure powers critical workloads across training and product, enabling models to run code, build software, interact with tools, and even control applications with user interfaces. We provision containers and virtual machines on large-scale clusters, granting models interactive control over these remote environments. Our work spans the full stack: from orchestrating massive jobs and resource scheduling at the cluster level, to fine-tuning filesystem performance on nodes. The Sandbox service enables Grok to safely run and test code in real-time for user queries, and supports reinforcement learning in training, where models interactively explore tools ranging from compilers to productivity apps.
BASIC QUALIFICATIONS:
- Expert knowledge of Rust, C++ or Go
- Familiarity with Python
- Deep experience with either Linux or Windows systems (familiarity with both is a strong plus)
- Experience with virtualisation and containerisation technologies (e.g., cgroups, KVM, gVisor, QEMU)
- Solid knowledge of the networking stack
COMPENSATION AND BENEFITS:
£107,000 - £262,000 GBP
Base salary is just one part of our total rewards package at xAI, which also includes equity, comprehensive healthcare and dental coverage, cash plan, income protection, life insurance, and various other discounts and perks.
xAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
Related roles
Researcher, Agent Post-Training, API & Power-Users
OpenAI
Remote · San FranciscoResearchMid-level$295,000 – $445,000
Researcher, Agent Post-Training, API & Power-Users at OpenAI — Remote · San Francisco. Mid-level research role on the Agents team.
rustawsllmrag
Mechanical Design Engineer
OpenAI
San FranciscoResearchMid-level$295,000 – $380,000
Mechanical Design Engineer at OpenAI — San Francisco. Mid-level research role on the Robotics team.
gorustawsrest
Technical Sourcer, Research
OpenAI
Remote · San FranciscoResearchMid-level$136.8K – $240K • Offers Equity • Multiple Ranges
Technical Sourcer, Research at OpenAI — Remote · San Francisco. Mid-level research role on the Recruiting team.
rustawsragrest
Researcher, Agent Post-Training, Personality
OpenAI
San FranciscoResearchMid-level$295,000 – $445,000
Researcher, Agent Post-Training, Personality at OpenAI — San Francisco. Mid-level research role on the Agents team.
gorustawsllm
Firmware Lead, Robotics
OpenAI
San FranciscoResearchLead / Manager$380,000 – $445,000
Firmware Lead, Robotics at OpenAI — San Francisco. Lead-level research role on the Robotics team.
gorustc++aws
Researcher, Training - London
OpenAI
London, UKResearchMid-level£170K – £445K • Offers Equity
Researcher, Training - London at OpenAI — London, UK. Mid-level research role on the Training team.
gorustawsllm