SpaceXSI

Sr. Machine Learning Engineer, Ads

Palo Alto, CA
Salary
$180,000 - $330,000
Level
Senior

Not stated in the posting: work type, visa.

Open. First seen 2 October 2026.

Apply on the company's site →

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, ADS

We’re looking for exceptional engineers who want to join us on a new project to integrate Grok into all parts of our Ads Platform. We’re looking for individuals who have built exceptional advertising products and systems at a massive scale across bidding, auction, marketplace, ranking, prediction, and product. We’re bringing SpaceXSI's technology stack to Ads Platform and using it to transform our advertising stack.

RESPONSIBILITIES:

  • Leverage the latest Grok models to power all stages of our advertising stack, from candidate selection to ranking, auction, campaign optimization, creative generation, and advertiser experience
  • Own and operate systems and products, driving the majority of revenue

BASIC QUALIFICATIONS:

  • 5+ years of industry experience working on large-scale, high-throughput AI-powered advertising products

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.

59% 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

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

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