Sr. Model Engineer, Mid-training

United States·Palo Altosenior

Other

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Quick Summary

Requirements Summary

Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++ Experience training large models (e.g., pre-training, post-training, fine-tuning,

Technical Tools

Other

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

~1 min read

→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

Requirements

~1 min read

Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++
Experience training large models (e.g., pre-training, post-training, fine-tuning, or RL training of neural networks with 1B+ parameters)

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

What We Offer

~1 min read

$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 is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

Location & Eligibility

Where is the job

Palo Alto, United States

On-site at the office

Who can apply

About this job

Pay per year: $180,000–$440,000 a year; 354% above the $68,210 median for Other jobs on Jobera (133,430 salaries).
Who can apply: United States
Posted: Today
Employer: has 309 open jobs on Jobera in 7 countries.