The coding challenge
built for both sides.

Developers get real feedback on real code, not whiteboard puzzles. Teams get scored, consistent assessments without pulling engineers off their work.

I’m hiring →
For developers

Prove it in real code

FullStack challenges drop you into an actual codebase with real bugs to find and fix. When you're done, you get an instant breakdown of what you caught, what you missed, and how your commits read. Honest feedback you can actually learn from.

✓Work in your own editor, no browser IDE
✓git-based workflow, just like real work
✓Detailed per-bug feedback, not just a score
✓Build a track record across challenges
For teams

Evaluate without the overhead

Send candidates a challenge link. They work in a real codebase, push their changes, and get scored automatically. You get a full breakdown of what they fixed, what they missed, and how their commits read. No manual review required.

✓Bring your own codebase or use ours
✓Send a challenge in under 5 minutes
✓Consistent rubric across every candidate
✓No engineer time spent grading
Start hiring free →

How it works

01
Get a challenge
Browse open challenges or receive an invite link from an employer. Every challenge is a real, runnable codebase.
02
Clone and fix
git clone the repo and work in your own editor. Fix the bugs, implement the feature. No restrictions on approach.
03
Push and get scored
Push your changes. AI scores your submission on correctness, approach, and commit quality within seconds.
How does the evaluation work? →

Pricing for teams

Simple, transparent pricing

Start free. Pay only when you need more assessments. Developers always use FullStack at no cost.

Free Trial
Free

3 assessments included. No card required.

✓3 candidate invites
✓AI evaluation on every submission
✓Full score breakdown
Start free
5 Pack
$200one-time

$40 per assessment. No commitment.

✓5 candidate invites
✓AI evaluation on every submission
✓Full score breakdown
Get started
10 Pack
$350one-time

$35 per assessment. No commitment.

✓10 candidate invites
✓AI evaluation on every submission
✓Full score breakdown
Get started
Best value
Base Plan
$250/mo

10 assessments/month. $25 per overage.

✓10 assessments/month
✓$25 per overage assessment
✓AI evaluation on every submission
✓Best value for active hiring
Get started

Need volume pricing or a custom plan? Contact us →

FullStack
How it worksContactFor Teams