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This position is no longer accepting applications
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July 14, 2026
Member of Technical Staff - RL Training Framework
Senior • On-site
180,000 - 440,004 USD/yr
Palo Alto, CA
SpaceXAI's mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity.
We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company's mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important.
All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.
About the Role
The RL infrastructure team is looking for an engineer to help develop our RL training framework.
Responsibilities
- Design and implement the systems backing all RL workloads, from small scale ablations to production training runs
- Profile, debug, and optimize end-to-end training performance
- Improve scalability and observability of the RL stack
Basic Qualifications
- Experience building, debugging, and optimizing efficiency of large-scale distributed systems
- Comfortable diving into unfamiliar areas and solving problems at all levels of the stack
- Proficiency in Python, Jax, Rust, and/or C++
Preferred Skills and Experience
- Experience with large scale LLM training infrastructure
- Strong knowledge of reinforcement learning techniques
- Experience with RL numerics
Compensation and Benefits
- $180,000 - $440,000 USD
- Equity package
- Medical, vision, and dental coverage
- 401(k) retirement plan
- Short and long-term disability insurance
- Life insurance
- Additional discounts and perks
SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
