Red Phanes Technology

Validate your dev tools.
Hire the engineers who proved it.

We run live coding competitions on Cozy Arena, then use our AI Judge & Talent Scout Engine to turn code submissions into real product feedback and real hiring signal — from the same event.

Sponsor a competition

Validate your API or SDK under real usage and walk away with a ranked hiring shortlist from the same event.

For sponsors →

Join as a developer

Compete live, get an AI-scored capability report, and get noticed by companies hiring for your stack.

For developers →
cozyarena.tech — live competition
Submission #14 — AI Judge scoring
91 / 100
Live leaderboard
DX Friction Report
Score
91
Errors
3.1
Every competition produces a real report.
Not a leaderboard screenshot — an actual DX friction report and candidate scorecard, generated automatically as developers build.
Scroll this into view and the copy sharpens into focus, the same way it would on the report itself.

Cozy Arena

Our live hackathon platform where developers and students compete on real problems, submit code, and win prizes.

For developers →

AI Judge & Talent Scout Engine

Every submission is evaluated by our proprietary AI, generating objective capability scorecards and skill matches — not just a leaderboard.

For sponsors →

B2B API & DX Testing

Deploy your API, SDK, or infrastructure into a live competition and get real-world friction reports and usability data.

For sponsors →

How it works

1

You bring the stack

Sponsors deploy their API, SDK, or cloud infrastructure into a live Cozy Arena competition.

2

Developers build live

Developers compete in real time, integrating your tools under real deadline pressure.

3

AI evaluates everything

Our AI Judge scores every submission and logs every friction point.

4

You get both outputs

A DX report for your product team, and a ranked shortlist for your hiring team.

What developers are saying

★★★★★
“Pushed me to write better code under real pressure.”
Priya S.
★★★★★
“A real scorecard instead of a generic rejection.”
Marcus T.
★★★★★
“Closer to a real job than a whiteboard interview.”
Aisha R.
★★★★★
“Better feedback than most code reviews at work.”
Devon K.
★★★★★
“Judging that actually felt fair and consistent.”
Sana M.
★★★★★
“A scorecard I could actually put on my portfolio.”
Leo P.
★★★★★
“Pushed me to write better code under real pressure.”
Priya S.
★★★★★
“A real scorecard instead of a generic rejection.”
Marcus T.
★★★★★
“Closer to a real job than a whiteboard interview.”
Aisha R.
★★★★★
“Better feedback than most code reviews at work.”
Devon K.
★★★★★
“Judging that actually felt fair and consistent.”
Sana M.
★★★★★
“A scorecard I could actually put on my portfolio.”
Leo P.
★★★★★
“Pushed me to write better code under real pressure.”
Priya S.
★★★★★
“A real scorecard instead of a generic rejection.”
Marcus T.
★★★★★
“Closer to a real job than a whiteboard interview.”
Aisha R.
★★★★★
“Better feedback than most code reviews at work.”
Devon K.
★★★★★
“Judging that actually felt fair and consistent.”
Sana M.
★★★★★
“A scorecard I could actually put on my portfolio.”
Leo P.
★★★★★
“Pushed me to write better code under real pressure.”
Priya S.
★★★★★
“A real scorecard instead of a generic rejection.”
Marcus T.
★★★★★
“Closer to a real job than a whiteboard interview.”
Aisha R.
★★★★★
“Better feedback than most code reviews at work.”
Devon K.
★★★★★
“Judging that actually felt fair and consistent.”
Sana M.
★★★★★
“A scorecard I could actually put on my portfolio.”
Leo P.
★★★★★
“Pushed me to write better code under real pressure.”
Priya S.
★★★★★
“A real scorecard instead of a generic rejection.”
Marcus T.
★★★★★
“Closer to a real job than a whiteboard interview.”
Aisha R.
★★★★★
“Better feedback than most code reviews at work.”
Devon K.

Ready to see it in action?

Whether you're validating a product or looking for your next hire, the next Cozy Arena competition is the fastest way to find out.

Get in touch