About the Hackathon

Whether you write code for a living or have never touched a terminal, this one's for you. Gemini Build Days is a hackathon where you'll use the Google Gemini API — paired with AI coding tools like Cursor, Claude Code, or your weapon of choice — to ship something real in just a few days.

Pick your lane: make work less painful, or make play more fun. Either way, Gemini has to do some of the heavy lifting.

The Two Tracks

Submit a project to one of the following tracks:

Track 1: Build Something Productive

Pick a workflow at your company that's annoying, slow, or just plain tedious — and reimagine it. Build the ideal version. The thing you wish existed every Monday morning. Expense reports, meeting follow-ups, status updates, onboarding checklists, knowledge digging — fair game. If it makes you sigh, it's a candidate.

Track 2: Build Something Playful

Build a game your team could actually play at the next offsite. It has to run on a MacBook and must include some kind of teamwork component — collaboration, coordination, shared objectives, whatever sparks that "okay, now we're a team" feeling. Trivia, party games, cooperative puzzles, weird social experiments — go nuts.

Requirements

Google Gemini API must power core functionality. Not a sprinkle — a real, load-bearing part of your project.

Your project must fit one (and only one) of the two tracks above.

Built during the hackathon window. Pre-existing projects don't count, though you can use open-source libraries and AI tools freely.

Teams of 1–4. Solo builders welcome.

Requirements

Live demo link — your project must be accessible to judges (hosted URL, downloadable build, or runnable repo with clear setup instructions).

Demo video (2–3 minutes) — walk us through the problem, the solution, and a quick demo. Show it working.

Project writeup — a short description covering:

  • The problem you're solving (or the game you're building)
  • How you used the Google Gemini API and which capabilities you leaned on
  • What AI coding tools helped you build it

Source code — link to a public repo (GitHub, GitLab, etc.).

Screenshots — 2–4 images of your project in action.

Prizes

$0 in cash
Swag
$0 in cash
3 winners

Swag prize

Judges

Robin

Robin
Devpost

Victor

Victor
Devpost

Judging Criteria

  • Technical Execution
    Does the project demonstrate quality application development? Does the project leverage Google Gemini 3?
  • Potential Impact
    How big of an impact could the project have for the use case it addresses?
  • Innovation / Wow Factor
    How novel and creative is the idea? How effective is the user experience?
  • Presentation / Demo
    Is the problem clearly defined, and is the solution effectively presented through a demo and documentation? Does the submission explain how they used Gemini 3?

Questions? Email the hackathon manager

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