Model Engineer, Mid-training
- Pay
- $180,000 – $440,000 per year
- Location
- Palo Alto, CA
- Listed
- 30 days ago
About the role
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.
Responsibilities
- Scale synthetic coding data to trillions of tokens with large-scale docker verification
- Distill the intelligence of flagship models into flash models through synthetic data generation
- Optimize mid-training data mixtures to boost the ceiling for RL
- Engineer long-context data recipes
- Develop robust and diverse evaluation for mid-training checkpoints
Basic Qualifications
- Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++
Preferred Skills and Experience
- Familiarity across all kinds of scaling laws
- Strong ability to design ML experiments
- Familiarity with state-of-the-art techniques for curating AI training data for text, image, audio, and video modalities
- Strong engineering abilities in large-scale data processing frameworks
- Experience with ML and large model scaling
- Experience with Spark, Ray, and other large-scale data processing frameworks
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.
Equal opportunity and legal notices
SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
From SpaceXSI's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.
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Common questions
What is the salary for the Model Engineer, Mid-training role at SpaceXSI?
The Model Engineer, Mid-training posting at SpaceXSI states compensation of $180,000 – $440,000 per year. Final pay may depend on location, experience, and interview evaluation on SpaceXSI's official career site.
Where is the Model Engineer, Mid-training job at SpaceXSI located?
This Model Engineer, Mid-training position at SpaceXSI is located in Palo Alto, CA. Always check SpaceXSI's application page for specific state eligibility or relocation policies.
How do I apply for the Model Engineer, Mid-training position at SpaceXSI?
This listing links directly to SpaceXSI's Greenhouse application page. You can apply directly on SpaceXSI's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Greenhouse application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.