Wrapped up Hack4Krak CTF 2026, the biggest in-person CTF for teenagers in Poland.
As technical lead, my favorite outcome is that the infra stayed boring: 17M+ requests in 30h, 450 rps peak, heavy bot traffic, and max backend CPU at 8% on a low-end ARM server.
Rust did its job.
Cloudflare reduced our traffic by over 89% during the Hack4Krak CTF. That is pretty impressive for a free plan