About Idler

Reinforcement learning environments.

Tech description:

TypeScript, React, NextJS, Postgres, NodeJS, various AI completions

Job description:

## **What we do** Idler builds reinforcement learning environments that teach AI models to code like 0.01% engineers. Our training environments are based on real-world coding scenarios that frontier models will actually encounter. We've closed a multimillion-dollar contract with a leading foundation lab (the largest they've issued to date). Demand is outpacing our capacity to deliver, so we're scaling the team fast. ## **What you'll do** Build agentic systems that create and QA coding environments at scale. Most of your day will be spent designing these systems to be extremely sound. A big part of our work is thinking critically about what makes a coding environment and task "good" and "fair". This requires high agency and philosophical thinking alongside technical execution. Concretely, you'll: - Design and build scaleable systems that generate RL environments - Create automated QA systems to validate environment quality and fairness - Work directly with AI researchers at leading labs to understand what makes training data effective - Support new product lines as we expand beyond coding environments ## Staff Engineer Responsibilities & Requirements - Lead the process of identifying, specifying, and implementing core technology primitives that maximize the leverage of the rest of the team. - Understand and own the technology stack end-to-end. - 8+ years of professional software engineering experience. - Lead and mentor more junior members of the team. ## **You'll work with** The founding team, a founding engineer, and a small group of engineers (we're hiring quickly). You'll have direct access to AI researchers at frontier labs. ## **Tech stack** Typescript, React, NodeJS, Postgres, Redis, Vercel, Cursor ## **Benefits** - Healthcare coverage, 401(k), and 15 days PTO. - Meals, coffee, and snacks (that you will actually enjoy) covered during working days. - Latest MacBook Pro and equipment. - Relocation assistance available. - Team offsites and events (we love hanging out). This is an in-person role in San Francisco. We're a tight-knit founding team and we play to win. Join us if you like to win too.

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