Huangxin Dong (HuangxinDong)

London, United Kingdom
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OpenAI Build Week

Online

Join a global week of building with Codex

$100,000 in prizes
Winners announced
46685 participants

HackLondon 2026

Greater London, United Kingdom

The annual hackathon of the world's greatest city. Hosted by KCL and UCL

Non-monetary prizes
Feb 21 – 22, 2026
230 participants

Gemini 3 Hackathon

Online

Build what's next

$100,000 in prizes
Winners announced
35515 participants