Sr. Machine Learning Engineer, Recommendation Systems
- Salary
- $180,000 - $330,000
- Level
- Senior
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.
SR. MACHINE LEARNING ENGINEER, RECOMMENDATION SYSTEMS
We’re seeking exceptional 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:
- 5+ years of industry experience in implementing recommender systems and/or deep learning applications at industrial scale
PREFERRED SKILLS AND EXPERIENCE:
- Experience in writing CUDA kernels
- Skilled in one or more DL software frameworks such as JAX or PyTorch
- Knowledge of data infrastructure like Kafka, Clickhouse, and Spark
COMPENSATION AND BENEFITS:
$180,000 - $330,000 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.
62% of this description is written for the role. The rest is SpaceXSI's standard text, folded away below.
Compared with SpaceXSI's other open jobs.
The team: Engineering HIRES STEADILY
This role is one of 30 open in Engineering. 5 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 (16 of 30), Rust (13 of 30), C++ (10 of 30), Golang (8 of 30), Java (8 of 30), Kafka (7 of 30), Machine Learning (7 of 30)
OTHER ROLES ON THIS TEAM
- Sr. Software Engineer, Data Engineering (X) posted Nov 6
- Sr. Software Engineer, Ads Product posted Nov 6
- Analytics Engineer (X) posted Nov 6
- Sr. Software Engineer, Linux Kernel posted Nov 6
- Senior Product Manager, Commerce Platform posted Oct 27
- Spring 2027 Software Engineering Internship/Co-op posted Oct 2
- Summer 2027 Software Engineering Internship/Co-op posted Oct 2
- Software Engineer, Evaluation Infrastructure posted Sep 30
- Sr. Network Engineer posted Sep 14
- Sr. Network Engineer posted Sep 14
- Sr. Analytics Engineer (X) posted Aug 12
- Sr. Software Engineer, Search Infrastructure posted Aug 6
- Sr. Software Engineer, X Developer Platform posted Aug 5
- Software Engineer, Linux Kernel posted Aug 3
- Software Engineer, Evals posted Jul 22
- Sr. ML Infrastructure Engineer posted Jul 22
- Sr. Software Engineer, Platform Infrastructure posted Jul 20
- Software Engineer, Network Software & Services posted Jul 15
- Software Engineer, Data Engineering (X) posted Jul 12
- Software Engineer, Network (C++) posted Jul 2
- Network Operations Technician (Starlink) posted Jun 19
- Software Engineer, Ads Product posted Jun 2
- Software Engineer, Imagine Safety posted May 31
- Sr. Maching Learning Engineer, Search Ranking posted Apr 30
- Sr. Backend Engineer, API posted Apr 24
- Sr. Software Engineer, Consumer Subscriptions posted Apr 16
- Sr. Software Engineer, X Money posted Apr 14
- Sr. Machine Learning Engineer, Ads posted Dec 3
- Sr. Software Engineer, Network Software & Services posted Oct 15
From the team and dates on SpaceXSI's own job board.
See Machine Learning Engineer salaries in the United States →
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