Lead Engineer, AI Infrastructure (C++, C)
xAI · Palo Alto, CA; Seattle, WA
About this role
**SpaceXSI — Lead Engineer, AI Infrastructure (C++, C)** SpaceXSI is building Super Intelligence to help humanity understand the universe. 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**. **What you’ll do** - Develop reliable, performant, and maintainable software for training Grok models on world-class compute clusters - Provide technical direction for future training architectures and hardware designs - Collaborate with model, kernel, network, hardware design, platform, and site ops engineers - Develop prototypes to validate key design concepts and quantify technical constraints - Lead team planning efforts with stakeholders to define milestones and execute against them **Basic qualifications** - Bachelor’s degree in computer science, engineering, math, or a technical discipline - Hands-on systems programming experience in **C or C++** **Preferred skills and experience** - Developed, debugged, and deployed software used in real-world applications/projects - **3+ years** software engineering experience, or **1+ year** C/C++ experience at SpaceX - Solid fundamentals in computer architecture, networking, math, and physics (including NVL72 GB300 racks) - Strong skills in modeling, debugging, performance optimization, and unit testing - Creative problem-solving, exceptional analytical skills, and strong engineering fundamentals **Compensation & benefits** - **$220,000 – $357,000 USD** - Equity and comprehensive medical, vision, and dental coverage - Access to a 401(k) retirement plan, disability and life insurance, and additional discounts/perks *SpaceXSI is an equal opportunity employer.* For details on data processing, see the **Recruitment Privacy Notice**: https://x.ai/legal/recruitment-privacy-notice
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