xAI
xAI builds Grok and trains frontier models on the Colossus supercluster. Hiring engineering, research, and infrastructure across the Bay Area, Memphis, and London.
About xAI
xAI is the AI company founded by Elon Musk to build Grok and train frontier large language models. The company operates Colossus, one of the largest GPU training clusters in the world, located in Memphis, Tennessee. xAI integrates closely with X (formerly Twitter) and Tesla, giving its products distribution and real-world data sources at unusual scale.
Open roles cover ML research (pretraining, RL, post-training), inference and serving infrastructure, GPU systems and cluster engineering, product engineering on Grok and the X integration, and a growing set of operations and recruiting positions. xAI hires primarily in the San Francisco Bay Area, Memphis (Colossus), and London, with some roles open in New York and remote-friendly options for senior engineers.
Frequently Asked Questions
Where does xAI hire?
xAI's main engineering and research office is in the San Francisco Bay Area (Palo Alto). The Colossus training cluster is in Memphis, Tennessee, where xAI hires datacenter, GPU systems, and infrastructure engineers. There is also a London engineering presence. Senior research and ML systems roles are sometimes open to remote candidates.
Does xAI hire in London?
Yes - xAI runs a London engineering hub focused on research and applied AI. Open London roles are listed above when available. Most London positions are research, ML engineering, or product engineering rather than infrastructure or GPU operations.
What is the xAI Colossus cluster?
Colossus is xAI's GPU supercluster in Memphis, Tennessee. It is one of the largest AI training clusters in the world, running NVIDIA H100 and H200 GPUs at the scale of 100,000+ accelerators. Hardware, networking, datacenter operations, and ML systems engineers at xAI work directly on Colossus.
What does xAI pay?
xAI pays at the top end of the AI lab market, similar to OpenAI and Anthropic. Senior ML engineers and researchers typically earn USD 400k-800k+ in total compensation including equity. Specific salary bands are listed on each open role.
How do I apply to xAI jobs?
Browse the open xAI roles listed on this page and click any position to apply directly through xAI's official careers portal. Applications are reviewed by xAI's recruiting team; expect an initial recruiter screen followed by technical interviews tailored to the role (coding, ML research depth, or systems design). New roles are added frequently, so check back or set up a job alert to be notified when matching positions open.
What teams does xAI hire for?
Major hiring areas include Grok pretraining and post-training research, reinforcement learning, inference and serving infrastructure, GPU systems and cluster engineering at Colossus, product engineering for Grok and the X integration, security, recruiting, and operations. Listings on this page are updated daily with the latest open roles.