One challenge. Real rewards.
Skill-based competitions across coding, data science, AI and more. Solve real problems, climb a live leaderboard, and earn gems, credits and verified certificates — free to enter, open to every level.
Free to enter · Open to all levels · Live leaderboard
MERN Stack Arena
LIVEThree steps from entry to reward
Every challenge mirrors real-world work, so you're scored on skills that actually matter — not puzzle trivia.
Pick a challenge
Filter by skill, difficulty and window — from 1-hour sprints to week-long builds. Most are free and open to every level.
Compete and learn
Solve real tasks in the browser. Answer a question and the AI explains why it’s right — and why the other options are wrong. Scores update live and you can resubmit until the window closes.
Win rewards
When the window closes, results are finalised and winners announced. Top performers earn gems, credits and a verified certificate, and climb the all-time leaderboard.
Practice that actually pays off
Competitions turn practice into proof — sharper skills, real rewards and a track record you can show off.
Win real rewards
Finish near the top and earn gems, credits and platform perks as you climb the leaderboard.
Real-world skills
Simulated job scenarios, not puzzle trivia. Debugging, trade-offs and shipping under a clock.
AI explains every answer
Answer a question and the AI breaks down why it’s right — and why the other options are wrong. You learn as you compete.
Verified certificates
Every finish adds a certificate with a unique verification code — ready for LinkedIn and your résumé.
Climb the leaderboard
Rank against players worldwide, track your progress and defend your spot on the all-time board.
Proof, not claims
Performance-based achievements on your record beat a bullet list of tools you’ve “worked with”.
Every result earns you something
A finished competition isn't just a rank. Top performers walk away with gems, credits and a verified certificate — and everyone builds a track record that grows with each challenge.
Place on the leaderboard and earn gems you can spend across the platform.
Strong finishes top up your credits — unlock more challenges and features.
Every completed competition adds a certificate with a unique verification code.
Scores, ranks and badges collect on one profile you can share anywhere.
1,240Gems
320CreditsVerified achievements
8 certificates earned
View wallet →Some competitions can get you hired
A few competitions run as Hiring Events. Perform well and recruiters review your results and résumé directly — top scorers get shortlisted and matched to open roles, no cold applications.
Your scores, ranks and certificates in one recruiter-facing view.
Top performers are surfaced to recruiters hiring in the event.
You’re judged on demonstrated skill, not keyword-matched CVs.
Strong results are matched to roles you fit — recruiters reach out to you.
Matched to 6 open roles
3 recruiters reviewing your profile
View matches →Hosted weekly across the stack
New categories are added regularly. If you build it, there's a challenge for it.
Questions, answered
Entry, eligibility, scoring, certificates and prizes.
How do the challenges work?
Who can participate?
Are competitions free?
What do winners get?
What’s a hiring event?
How are winners decided?
Can I resubmit if my first attempt goes badly?
How do I start as a beginner?
What happens after a competition ends?
How do I prove achievements to employers?
Ready to prove it?
Join 18,000+ players testing their skills every week. Get ranked, earn rewards and collect certificates that prove what you can do.
No credit card required · Free competitions available
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