Posting record
Open 17+ days
- Idler's site dates the posting
- Ghostless first sees this listing
- Last checked: still up
How we know
It hasn't been reposted, listed twice, or left up unusually long, and the posting doesn't say it's a talent pool.
Ghostless records the day it first sees a posting, so a repost can't reset its age. This one was already up when Ghostless started tracking Idler, so its true age is longer.
Last checked Nov 1, 2026.
How well do you match?
See how much of this posting your resume shows, and what it's missing.
Upload your resumeWhat it asks of you
- 1–10 years of experience
What the posting discloses
- Pay
- $125k to $400k a year USD
Not stated: Real vacancy, AI screening.
Why these three
Ontario requires postings from employers with 25 or more staff to state the pay, whether the vacancy exists, and whether AI screens applicants.
Skills mentioned
About the role
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.
You can see some of our work here: https://idler.ai/collections
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.
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