ML Infrastructure Engineer
- Salary
- $180,000 - $440,000
- Level
- Mid
Not stated in the posting: work type, visa.
Open. First seen 2 October 2026.
About the role
SpaceXSI's standard text
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.
ABOUT THE ROLE:
As an ML Infrastructure Engineer, you will play a pivotal role in building and optimizing the reliable, high-performance ML platform that powers recommendations on X. We're looking for exceptional engineers who are passionate about our mission and have a strong desire to make a meaningful impact.
RESPONSIBILITIES:
- Designing, building, and scaling GPU compute infrastructure, training frameworks, and experimentation tools to enable rapid iteration on ML hypotheses
- Developing data pipelines and integrating large-scale data, training, and inference systems
- Collaborating with ML teams to productionize models and ensure seamless integration across the stack
- Ensuring scalability, reliability, and efficiency of large-scale machine learning systems
- Working across the full stack to solve complex problems independently
- Mentoring junior engineers and contributing to the growth of the team
BASIC QUALIFICATIONS:
- Bachelor, Master, Post-graduate or PhD in computer science, machine learning, or other quantitative discipline; or equivalent work experience
- 2+ years of industry experience working with high traffic or large-scale production environments, distributed systems, GPU infrastructure, and/or deep learning applications
- 2+ years experience with ML platforms, training infrastructure, or close collaboration with modeling engineers and data scientists
- Strong proficiency with Python and experience with compiled languages such as C++ or Rust
PREFERRED SKILLS AND EXPERIENCE:
- Deep familiarity with modern ML frameworks such as JAX or PyTorch
- Low-level understanding of compute systems, including distributed storage, NVIDIA drivers, CUDA toolkits, and networking
- Comfortable with Linux systems and orchestration tools
- Experience with job schedulers (e.g., Slurm), configuration management (Puppet/Ansible), or related infrastructure tooling
COMPENSATION AND BENEFITS:
$180,000 - $440,000 USD
Base salary is just one part of our total rewards package at SpaceXSI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.
SpaceXSI's standard text
SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
What this role asks for
Standard for DevOps / SRE / cloud roles
Linux · Python
Common in DevOps / SRE / cloud postings at any company.
68% of this description is written for the role. The rest is SpaceXSI's standard text, folded away below.
Read against SpaceXSI's other open postings on this site.
The team: Engineering HIRES STEADILY
This role is one of 27 open in Engineering. 3 were posted in the last 30 days and the oldest in April: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Python (13 of 27), Rust (10 of 27), C++ (8 of 27), Networking (7 of 27), Golang (6 of 27), Java (6 of 27), C (5 of 27)
OTHER ROLES ON THIS TEAM
- Spring 2027 Software Engineering Internship/Co-op posted Oct 2
- Summer 2027 Software Engineering Internship/Co-op posted Oct 2
- Member of Technical Staff - Evaluation Infrastructure posted Sep 30
- Network Engineer posted Sep 14
- Network Engineer posted Sep 14
- Analytics Engineer - X posted Aug 12
- Research Analyst posted Aug 11
- Software Engineer - Search Infrastructure posted Aug 6
- Software Engineer - X Developer Platform posted Aug 5
- Software Engineer - Linux Kernel (C++, C) posted Aug 3
- Software Engineer - Evals posted Jul 22
- Software Engineer - Platform Infrastructure (Rust, C++) posted Jul 20
- Software Engineer - Network Software and Services posted Jul 15
- Software Engineer - X Data Engineering posted Jul 12
- Software Engineer - Network (C++) posted Jul 2
- Network Operations Technician (SpaceXAI / Starlink) posted Jun 19
- Software Engineer, Ads Product posted Jun 2
- Member of Technical Staff - Imagine Safety posted May 31
- Software Engineer - Search Ranking posted Apr 30
- Backend Engineer - API posted Apr 24
- Software Engineer - Consumer Subscriptions posted Apr 16
- Software Engineer - X Money posted Apr 14
- Machine Learning Engineer - Ads posted Dec 3
- Exceptional Software Engineer posted Oct 23
- Software Engineer - Networking Software and Services posted Oct 15
- Machine Learning Engineer - Recommendation Systems posted Apr 11
From the team and dates on SpaceXSI's own job board.
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