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SpaceXAI

Software Engineer - Kernels/CUDA (C++)

SpaceXAI · Palo Alto, CA

Posted about 2 months ago · $180,000 - $440,000

or apply directly on SpaceXAI's site. We never take the application ourselves.

Is this posting real?

This role has been open
66 days
SpaceXAI's roles stay open a median of 66 days
Reposted
No
Salary listed
Yes
32% of SpaceXAI's roles list one
Ghost-job risk at SpaceXAI
high
221 stale, 5 reposted of 258 open
Hiring momentum
339 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-08

Measured from postings appearing on and disappearing from SpaceXAI's own greenhouse board since 2026-08-03. Full hiring picture for SpaceXAI.

About this role

As a Software Engineer focused on Kernels and CUDA at SpaceXAI, you will be integral to building and optimizing one of the world's largest AI supercomputers. Your responsibilities will include designing GPU clusters, developing low-level CUDA kernels, and collaborating with AI research teams to enhance performance and scalability. This role demands a hands-on approach and a commitment to engineering excellence in a fast-paced environment.

Our read on this posting4.0out of 5
benefits
4/5
freshness
1/5
career value
5/5
role clarity
5/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of SpaceXAI as an employer.

What you need

  • Strong experience in C/C++ programming
  • Experience with GPU kernel optimization
  • Ability to profile and debug GPU memory hierarchy and multi-GPU operations
  • Experience with large-scale GPU clusters or distributed compute infrastructure
  • Strong communication skills

Nice to have

  • Deep low-level systems programming (PTX/SASS)
  • Hands-on work with CUTLASS and Nsight profiling
  • Track record of building or running high-performance infrastructure for AI workloads
  • Ability to reason from first principles for optimization

What you get

  • Base salary range of $180,000 - $440,000 USD
  • Equity
  • Comprehensive medical, vision, and dental coverage
  • Access to a 401(k) retirement plan
  • Short & long-term disability insurance
  • Life insurance

Worth weighing

  • Role involves high-level responsibility and ownership of critical infrastructure
  • Flat organizational structure may require strong initiative and self-direction
  • High compensation range may indicate a competitive and demanding work environment

Summarised from SpaceXAI's posting. Read the full original.

Listed by SpaceXAI on their greenhouse job board, last confirmed open on 2026-10-08. PitchMeAI is not the employer.

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