Ryosuke Sakamoto (sumiresakamoto)

swe

Kobe, Hyogo, JP
GitHub
Twitter
LinkedIn

Kiroween 2026

Featured

Online

Build something wicked and git commit to the darkness.

$100,000 in prizes
Submissions open soon
1896 participants

PayPal AI Hackathon

Online

Build what’s next with PayPal and AI

$67,500 in prizes
Nov 12, 2026 03:00 PM EST to submit
23475 participants

Nebius x NVIDIA Global AI Hackathon

Online

Build the next frontier of AI on open infrastructure

$50,000 in prizes
Oct 30, 2026 01:00 PM EDT to submit
28820 participants

Build With AI: Basics

Online

Learn AI best practices by creating a solid proof-of-concept for your dream project.

$2,500 in prizes
Winners TBD
5111 participants

RevenueCat Shipaton 2026

Online

Ship apps and start making money.

$740,000 in prizes
Winners announced
28575 participants