Software Engineer

About idleridler is a frontier data research lab. We build the evals and environments that the world's leading frontier labs use to measure and train their models.After raising a $9m seed round led by Paradigm, we spent the last year developing coding evals for top coding models you know and love. At the same time, we've expanded into other domains besides coding: RSI & Auto-Research, Law, Enterprise Business, Cybersecurity, and others. Now, we are facing more lab demand for our data than we can serve, and are rapidly scaling the team to grow the business.Our approach to creating training data scales using technology, and all of our data products are built on a unified self-reinforcing platform that learns through experience.You would be joining a close-knit team that has reached product market fit, and your work would directly help to multiply our revenue.You can see some of our work here: https://idler.ai/collectionsAbout the roleAs a Software Engineer at idler, you’ll build the systems and infrastructure that our entire company relies on. You will solve open-ended, technical challenges with focus on performance, scale, and simplicity. In the era of AI-coding, systems-level thinking and attention to detail is more important than experience with a particular framework or language.Examples of what you'll doDesign and build scaleable systems that generate RL environmentsCreate agentic QA systems to validate environment quality and fairnessWork directly with AI researchers at leading labs to understand what makes training data effectiveHandle petabyte scale ETL and orchestrate millions of concurrent jobsSupport new product lines as we expand beyond coding environmentsManage our security posture and compliance requirementsWhat we’re looking for1-10 years of experience writing excellent production software (new grads OK)Experience with full-stack applications in a popular programming languageA meticulous problem solver who creates robust systems under time pressureTech stackTypescript, React, NodeJS, Postgres, Redis, Vercel, Cursor/Claude Code/Codex, Tinker, Modal, AWS, Daytona, GRPODetailsIn-person in San FranciscoCompetitive salary + meaningful equityFree meals in officeHealthcare, 401(k), 15 days of PTO per yearRelocation assistanceSmall, ambitious teamThis 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.