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xAIxAI

Member of Technical Staff

Build and optimize the RL training framework and infrastructure for large-scale workloads at SpaceXAI, from ablations to production runs. Requires experience with distributed systems and proficiency in Python, JAX, Rust, or C++.

About the job

Responsibilities

  • Design and implement the systems backing all RL workloads at SpaceXAI, 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 total compensation (base salary is one part of total rewards, which also includes equity and benefits).

Skills

Python, JAX, Rust, C++, Distributed Systems, Llm Training, Reinforcement Learning

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