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SpaceXSI

Machine Learning Engineer - Recommendation Systems

Palo Alto, CA
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:

We’re seeking exceptional Applied engineers to join a high-priority project that approximately 600 million monthly users use. This is an exciting opportunity for individuals with a engineer or scientist background to apply their skills to recommendation systems, ranking algorithms, search technologies, and many other systems. You’ll work at the intersection of advanced AI development and real-world impact, enhancing the ability to connect users with relevant content, accounts, and experiences.

RESPONSIBILITIES:

  • Designing and architecting recommendation algorithms across various product surfaces
  • Leverage all of SpaceXSI's infra and AI stacks to dramatically enhance the user experience
  • Write data pipelines and training jobs that continuously learn from product data.
  • Iterate and improve the algorithm by gathering user feedback in real time through experimentation
  • Ensuring scalability and efficiency of machine learning systems

BASIC QUALIFICATIONS:

  • Knowledge of data infrastructure like Kafka, Clickhouse, and Spark
  • Experienced in implementing recommender systems and/or deep learning applications at industrial scale
  • Skilled in one or more DL software frameworks such as JAX or PyTorch
  • Exceptional candidates may be experienced in writing CUDA kernels

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 data science / ML roles

Machine Learning · PyTorch

Common in data science / ML postings at any company.

61% 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

From the team and dates on SpaceXSI's own job board.

See Machine Learning Engineer salaries in the United States →

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