Drimva

Magic

Member of Technical Staff, RL Research & Environments

$275K–$550K

San Francisco · On-site · Staff · Full-time · Posted Nov 8, 2024

Visa sponsorship
Visa sponsorship is offered, if possible.

About the job

Build and operate post-training data, evaluation, reward, and environment systems to improve long-context model capabilities and user-facing behavior.

What you'll do

  • Create and curate post-training datasets, including through synthetic generation, targeted collection, and self-play.
  • Build evaluation frameworks, reward signals, and training environments; run experiments to measure capability improvements.
  • Maintain reliable post-training pipelines and work with Product and Research to turn capability goals into measurable iterations.

What they ask for

  • Strong software engineering fundamentals.
  • Experience building or operating large-scale data or ML systems.
  • Ability to design and interpret experiments measuring changes in model behavior.
  • Track record of owning experimental or production systems end-to-end.

Pay

$275K - $550K USD base salary; $275K – $550K USD (type unspecified)

AI focus

Post-training and reinforcement learning work to improve model capabilities, including long-context reasoning, coherence, context use, and tool-augmented behavior.

Model-written summary · the original posting is authoritative

First seen Oct 10, 2026 · Last verified Nov 6, 2026 (UTC)