John Osezele (JohnOsezele)

Mobile developer

Bitcoin++ Open Source Edition

Nairobi, Kenya

bitcoin++ works in public

$6,180 in prizes
Jun 17 – 18, 2026
90 participants

Code with Kiro Hackathon

Online

A challenge for developers to explore Kiro, an AI IDE that works alongside you to turn ideas into production code with spec-driven development.

$100,000 in prizes
Winners announced
9943 participants

Bitcoin 2025 Official Hackathon

Online

Virtual Hackathon for the Bitcoin 2025 Conference in Las Vegas

$58,750 in prizes
Winners announced
828 participants

MIT Bitcoin Hackathon: Freedom Tech

Online

Join us for the annual MIT Bitcoin Hackathon -- we welcome projects built on Bitcoin like technology to compete for a $10K prize pool.

$10,000 in prizes
Winners announced
496 participants

Square Unboxed Hackathon

Online

Build or extend an app with new features using Square’s new Bookings API release, Cash App Pay, Checkout API, or Terminal API.

$85,000 in prizes
Winners announced
806 participants

Local Hack Day: Build Day 1

Online

Embark on a week of creation and exploration at LHD: Build! Prepare to conquer projects both big and small as you expand your network, skillset, and hacker portfolio.

Non-monetary prizes
Winners announced
633 participants

Chainlink Fall Hackathon 2021

Online

Build the next generation of hybrid smart contracts alongside developers, creators, artists, and industry-leading mentors from across the blockchain ecosystem.

$606,500 in prizes
Winners announced
1520 participants

Celo's Make Crypto Mobile Hackathon

Online

Make Crypto what it should be; — Mobile. Accessible. For everyone.

$2,572,000 in prizes
Winners announced
2324 participants

BlockHack Hackathon

Online

Bridging the gap between entrepreneurs and blockchain technology, promoting growth for blockchain-related projects and ventures

$10,000 in prizes
Winners announced
136 participants

Facebook Hackathon: Messaging

Online

Build messaging solutions that empower conversation

$7,000 in prizes
Winners announced
2008 participants

monday Apps Challenge: Dream it, build it

Online

Build any app you can dream of and drive away in a Tesla X

$171,590 in prizes
Winners announced
1568 participants