Tracks
Review challenges for the stack you use.
Real pull requests per track. Start with first-day fixes, finish with lead-level calls, and earn a badge at 70% overall.
- 16
- Tracks
- 8
- Reviews each
- ~104
- Minutes
Inside a track
Frontend Engineer · React
- 01Fix the busted responsive layout
- 04Kill the unnecessary re-renders
- 06Ship an accessible modal
- 08Guard the bundle from perf regressions
First 3 graded reviews free PROLead steps
Frontend
From markup to design-system ownership.Backend
From request validation to live migrations.Laravel
Backend Engineer
8 reviews · ~104 min Preview
Django
Backend Engineer
8 reviews · ~104 min Preview
Rails
Backend Engineer
8 reviews · ~104 min Preview
Node / Express
Backend Engineer
8 reviews · ~104 min Preview
Spring Boot
Backend Engineer
8 reviews · ~104 min Preview
ASP.NET Core
Backend Engineer
8 reviews · ~104 min Preview
Fullstack
Both sides of the wire, end to end.ML / Data
From data hygiene to production inference.Pick a stack. Start free.
Your first 3 graded reviews are free, on any track.