Senior Software Engineer

San Franciscofull-timesenior

Software EngineerSoftware Engineering

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Quick Summary

Overview

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.

Key Responsibilities

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.

Technical Tools

postgresqlreactredistypescriptvercel

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.

Responsibilities

~1 min read

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:

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Design and build scaleable systems that generate RL environments
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Create automated QA systems to validate environment quality and fairness
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Work directly with AI researchers at leading labs to understand what makes training data effective
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Support new product lines as we expand beyond coding environments

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.

Typescript, React, NodeJS, Postgres, Redis, Vercel, Cursor