Member of Technical Staff - Sandbox Service

xai· Infrastructure
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📍 London, UK

About this role

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.

Frequently Asked Questions

Is the salary disclosed for the Member of Technical Staff - Sandbox Service position at xai?
The salary for this Member of Technical Staff - Sandbox Service role at xai is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Member of Technical Staff - Sandbox Service position at xai located?
This Member of Technical Staff - Sandbox Service role at xai is based in London, UK. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Which team or department does the Member of Technical Staff - Sandbox Service at xai belong to?
This Member of Technical Staff - Sandbox Service position is part of the Infrastructure department at xai. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Member of Technical Staff - Sandbox Service position at xai?
Click the "Apply Now" button on this page. You will be redirected to xai's official application portal hosted on greenhouse where you can submit your application directly.
When was the Member of Technical Staff - Sandbox Service job at xai posted?
This Member of Technical Staff - Sandbox Service position at xai was posted on Dec 18, 2025. Apply as soon as possible — early applications are often reviewed first.
Member of Technical Staff - Sandbox Service
xai
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You'll be redirected to xai's official application page on Greenhouse.