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ExperiencedAI

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

xAI · Palo Alto, CA; Seattle, WA

Posted Nov 8, 2026

Est. total comp~$182K–$281K

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From the posting

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 team produce, including reliability, fault tolerance, throughput, security, and developer experience. You are the engineer that other engineers count on; you are technical, you tackle every problem with enthusiasm; you remove hurdles. You are a self-starter and a team player. …

Excerpt from xAI's public job board. Read the full posting.

Job inventory

Required 2 items

Education: Bachelor's degree in computer science, engineering, math or a related field

Skills and tools: C++

Preferred 7 items

  • 3y
  • 1y

Experience: 3+ years of experience in software engineering, 1+ year of experience in C/C++ at SpaceX

Skills and tools: Optimization, Unit testing, Networking, Physics, Mathematics

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About this listing. Pulled automatically from xAI's public job board and refreshed daily; closed roles are removed. Mars Mining Co. is not the employer, does not take applications and does not screen candidates. Field and level labels come from the job title and can be wrong.

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About the pay figures (~): These are estimates. Yearly figures are estimated total comp ranges: the employer's posted pay range, or, with no posted pay, the median to 90th-percentile BLS wage for similar jobs, plus typical benefits and bonus, without stock. Hourly figures for internships and contract roles are posted rates or BLS hourly wage ranges. Figures outside the U.S. and for loosely matched titles are rough ballparks. How we estimate