Prove developer skill through real builds.
DevMarathon helps developers build real projects in 72-hour AI-assisted marathons, and helps organizations run structured hiring challenges based on real execution.
For developers
Start a solo marathon, follow an AI-generated build plan, ship inside 72 hours, and turn the result into a shareable proof of execution.
For organizations
Create hiring challenges where candidates build real projects, submit work, and can be reviewed through structured execution signals.
How DevMarathon works
One platform, two entry points: solo proof-of-work for developers and structured build challenges for teams.
Start a 72-hour challenge
Choose the right path for a solo build or a structured hiring challenge.
Build with AI-assisted guidance
Use planning, scaffolding, review, and refinement support while the builder still does the work.
Submit and get scored
Turn completed work into a score and shareable execution signal.
Build proof as a developer.
Use AI planning support, then execute the project yourself inside the 72-hour marathon.
AI Architecture Planner
Generates system design, tech stack, repo structure, and milestone guidance.
AI Code Scaffolder
Creates starter structure and setup files so the build can begin quickly.
AI Code Critic
Reviews the plan before implementation and flags risks or missing logic.
AI Plan Refiner
Improves the blueprint based on review feedback before execution starts.
Run structured build challenges.
Give companies, schools, and communities a clearer way to evaluate real project execution.
Create a challenge
Define the role, project context, and expectations for candidates.
Invite developers/candidates
Route participants into the same structured challenge flow.
Review submissions and execution signals
Compare submissions through the same structured challenge flow.