declaj

How it works: you register a club in any real city, get a squad with names authentic to that country (generated from name datasets covering 211 countries, weighted by real demographics), and your matches play out live, minute by minute, on a real schedule — one season per real week, with promotion/relegation between world leagues and national leagues, transfer auctions, and sponsors.

The part I'm most proud of technically: matches are fully deterministic. Every match runs off a cryptographically pre-generated "tape" of rolls, the server is the sole authority for results (clients only animate), and any replay reproduces the original live broadcast minute for minute — same commentary, same substitutions, same score. Making live === replay hold exactly, across stale client bundles and background tabs, was much harder than the simulation itself.

  Stack: Next.js 16, TypeScript, Zustand, Framer Motion, PostgreSQL (Supabase), Vercel. ~1,200 tests.

  Everything is visible without an account — leagues, live matches, standings. If you want your own club in the game, registering one takes a minute (any city in the world). A relaxed version of complex games. Just relax and enjoy every day live. 

Happy to answer anything about the engine, replay determinism, the credit economy, or what it's like running weekly seasons in production.