Hackathons for developers
5 open hackathon opportunities for software developers, each checked against the organizer's official page.
Arbitrum Open House Singapore Online Buildathon 2026
Arbitrum runs a three week online buildathon with $115,000 in prizes and grants. Registration on HackQuest closes on October 2, 2026, submissions on October 4.
AWS Agents for Humans Hackathon 2026
AWS pays $40,000 in cash prizes for AI agents built with the Strands Agents SDK that take over repetitive tasks. Submissions close on September 14, 2026.
Colosseum Crypto World's Fair Hackathon
Colosseum opens its first online hackathon for builders from all blockchain ecosystems, with prize tracks per ecosystem and a general prize pool. It runs from September 14 to October 12, 2026.
Decentralize AI Hackathon by HackerNoon
A $51,750+ prize pool and $35,000 in compute credits for developers building open AI infrastructure. The second round of entries ends on February 27, 2027.
Hackaday Retrocomputing Contest 2026
Hackaday and DigiKey give a $150 gift certificate to each of three favorite retrocomputing projects. Entries close on October 27, 2026.