Software Engineer
- Location
- San Francisco, CA · On-site
- Job type
- Full-time
- Level
- Mid-level
- Listed
- 30 days ago
Skills & highlights for this role
- TypeScript
- Node.js
- PostgreSQL
- distributed systems
Also useful
- React
- Redis
- AWS
- reinforcement learning
Stated benefits & perks
- 401k
- Pto
About the role
As 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 do
- Design and build scaleable systems that generate RL environments
- Create agentic QA systems to validate environment quality and fairness
- Work directly with AI researchers at leading labs to understand what makes training data effective
- Handle petabyte scale ETL and orchestrate millions of concurrent jobs
- Support new product lines as we expand beyond coding environments
- Manage our security posture and compliance requirements
What we’re looking for
- 1-10 years of experience writing excellent production software (new grads OK)
- Experience with full-stack applications in a popular programming language
- A meticulous problem solver who creates robust systems under time pressure
- Tech stack
- Typescript, React, NodeJS, Postgres, Redis, Vercel, Cursor/Claude Code/Codex, Tinker, Modal, AWS, Daytona, GRPO
Details
- In-person in San Francisco
- Competitive salary + meaningful equity
- Free meals in office
- Healthcare, 401(k), 15 days of PTO per year
- Relocation assistance
- Small, ambitious team
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.
About idler
About idler idler 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.
From idler's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.
How Rolev.ai helps with this application
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Common questions
Where is the Software Engineer job at idler located?
This Software Engineer position at idler is located in San Francisco, CA (On-site). Always check idler's application page for specific state eligibility or relocation policies.
What qualifications are required for Software Engineer at idler?
For the Software Engineer role, idler highlights experience with TypeScript, Node.js, PostgreSQL, distributed systems. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Software Engineer position at idler?
This listing links directly to idler's Ashby application page. You can apply directly on idler's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.