Senior RL Environments Engineer — Production & Scale

Pareto in San Francisco builds production RL environments and data platforms for frontier labs. You will own environments end to end, from build to production, and work between research teams and engineering to ensure clear specs and reliable delivery.

This role demands shipping fast, owning the release path, and turning training signals into product improvements. Equity is part of the package, and you’ll be at the core of the platform that underpins models at Anthropic and GDM.