xAI· Infrastructure· London, UK
Member of Technical Staff - Sandbox Service
Classified Tasks (12)
Automate 0%Augment 92%Human-Only 8%
Augment (11)
AI assists, human decides
Build and maintain a secure, scalable system that provides models with safe, controlled access to computational environments
technical
Provision containers and virtual machines on large-scale clusters
operational
Enable models to run code in remote environments in real time
technical
Enable models to build software within provisioned environments
technical
Enable models to interact with external tools and control applications with user interfaces
technical
Orchestrate massive jobs and perform resource scheduling at the cluster level
operational
Fine-tune filesystem performance on cluster nodes
technical
Enable Grok to safely run and test code in real time for user queries
technical
Support reinforcement learning training by enabling models to interactively explore tools such as compilers and productivity applications
technical
Operate and maintain infrastructure that powers critical workloads across training and product
operational
Share knowledge concisely and accurately with teammates
communication
Human-Only (1)
Requires human judgment
Grant models interactive control over remote computational environments
technical
Job description
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 xAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice .