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From the employer's careers site First seen 14 Nov 2026

Machine Learning Research Engineer

SpaceXSI Palo Alto On-site senior full-time

Salary

$220,000 - $357,000 USD per year

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Description

We are seeking a Machine Learning Research Engineer to join our team. You will design and run rigorous experiments to improve model capability, develop data recipes, and advance training science.

Responsibilities:

  • Design and run experiments to measure gains in model capability
  • Improve data quality and develop data recipes
  • Define metrics for RL data and rewards
  • Advance training science and develop post-training recipes
  • Build evaluations and targeted tasks to guide investments
  • Collaborate with engineers to scale training runs

Basic Qualifications:

  • 3+ years of experience training large neural networks (1B+ parameters)
  • Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++

Preferred Skills and Experience:

  • Experience with RL algorithms and language models
  • Strong background in RL and machine learning fundamentals
  • Excellent programming skills in Python and PyTorch or JAX
  • Experience with distributed training and debugging
  • Track record of original work in ML

Additional Requirements:

  • Must be able to work onsite in Palo Alto

Compensation and Benefits:

  • Annual salary: $220,000 - $357,000 USD
  • Comprehensive benefits package, including equity, medical, vision, and dental coverage, 401(k) plan, and more

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Skills

Nice to have

  • RL algorithms
  • language models
  • distributed training
  • debugging
  • ML fundamentals

Ready to apply?

You apply with the employer directly. Their original posting is here: https://cursor.com/careers/sr-model-engineer-rl-data

Apply on SpaceXSI