OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46713 participants
Hack Day in UPJŠ Košice, Slovakia Hack Day at UPJŠ is a one-day beginner-friendly hackathon. Work in teams, build simple projects, learn new tools, and get mentor support. Just bring your laptop and curiosity. Non-monetary prizes Mar 26, 2026 21 participants
