Lead Engineer, AI Infrastructure (C++, C)

SpaceXSI·Palo Alto, CA; Seattle, WA·Posted 8 November 2026

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About the role

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars. SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next. LEAD ENGINEER, AI INFRASTRUCTURE (C++, C) The Grok training program is looking for a lead software engineer on the AI infrastructure team. You will lead the team that architects, implements, and maintains the software infrastructure responsible for training grok models on hundreds of thousands or millions of GPUs. The success of Grok depends on the quality of the software that you and your…

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