Sr. Model Engineer, Model Training

xAI|02 Nov 2026

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Listed location: Palo Alto, CA; Austin, TX; New York, NY; Seattle, WA

Work arrangement: onsite. A remote label does not confirm worldwide eligibility or visa sponsorship.

Read the employer’s description for qualifications, compensation and work eligibility. Confirm the position is still open on the application page.

Job description supplied by xAI; category and skill labels may be inferred. How our listings work · Report a problem

Job Description

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.

BASIC QUALIFICATIONS:

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

PREFERRED SKILLS AND EXPERIENCE:

Experience training models used by millions of users
Power user of AI models
You believe truth-seeking AI is the most important and challenging problem
You take pride in your work and thrive in meritocratic environments
You are obsessed about building incredibly useful models

COMPENSATION AND BENEFITS:

$180,000 - $600,000 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.

Skills mentioned

PythonPyTorchJAXRustC++

Frequently asked questions

Is the Sr. Model Engineer, Model Training position at xAI remote?

The Sr. Model Engineer, Model Training role at xAI does not have a confirmed remote arrangement in our data. Check the employer description for its work location.

What type of employment is the Sr. Model Engineer, Model Training role?

xAI is hiring for a full-time Sr. Model Engineer, Model Training position.

Which skills are mentioned for the Sr. Model Engineer, Model Training job at xAI?

Detected skill labels include Python, PyTorch, JAX, Rust, C++. Check the employer description to distinguish required skills from preferred experience.