
AI · San Francisco
Idler
Idler builds reinforcement learning coding environments that train AI to code like elite engineers using real-world scenarios. It closed a multimillion-dollar contract with a leading foundation lab and is scaling to power the training data layer for frontier AI; SF-based.
- Locations
- San Francisco+1
- Also Remote
- Team size
- 11-50 employees
- Founded 2025
- Total raised
- $9.5M
- Seed · last round Aug '26
- Salary range
- $125–500k
- 3 of 5 roles
- Open roles
- 5
Open positions · 5
About Idler
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), and demand is outpacing our capacity to deliver. We're scaling fast to build the training data layer for frontier AI. Every breakthrough model will need environments like ours to learn real-world skills at scale. We're a tight-knit founding team in San Francisco. We move quickly, think deeply about what makes good training data, and play to win. Join us if you want to win too.
Culture & values
We are a tight-knit founding team in San Francisco.
We move quickly.
We think deeply about what makes good training data.
We play to win.
The team at Idler
11-50 employees peopleSee everyone on LinkedIn
Location
Frequently asked questions
Of 5 open roles, Idler has 2 remote, 3 on-site positions.
Idler is based in San Francisco.
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