Software Engineer - Network (C++)
SpaceXAI · Palo Alto, CA; Seattle
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- Company
- SpaceXAI
- Location
- Palo Alto, CA; Seattle
- Salary
- $180,000 - $440,000
- Posted
- July 2, 2026
About this job
At SpaceXAI, we design, build, and operate Colossus from the ground up. This includes the massive GPU clusters, high-speed interconnect fabric, and the software that makes it all work at unprecedented scale. Colossus powers Grok and our frontier AI models with a custom, high-performance datacenter network that delivers ultra-low latency and massive bandwidth across hundreds of thousands of GPUs. As a Software Engineer on the Colossus Networking team, you will develop the core networking software that maximizes the performance and reliability of our datacenter fabric. Your work will directly impact training efficiency, model convergence, and the speed at which we can push the frontier of AI.…
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