A padel super app for Pakistan, where a court can only ever be sold once.

Pakistan's padel players wanted one app for the whole game: finding and paying for a court, joining open matches and tournaments, booking coaching, and seeing where they rank. The courts' owners needed the other side of it.

That a court slot paid for with real money is taken once: locked, paid, checked in, and played, with nothing in between left to chance.

Four parts built to one contract: a player app and a facility-owner app in Flutter, an admin panel in Next.js, and a FastAPI backend of 31 modules.

1. 01

   The booking core

   lock(slot) → pay → check_in

   Atomic slot locking in Redis Lua, feeding a lock, pay, check-in, and result lifecycle, so no court is sold twice.

2. 02

   Five ways to pay

   pay(provider)

   PayFast, Stripe, EasyPaisa, JazzCash, and SadaPay behind one pluggable interface.

3. 03

   The money audit

   audit(money)

   Led the security and money audit: fixed a P0 payment bypass and an OAuth role escalation, and moved every amount to integer minor units.

4. 04

   Tests & releases

   pytest --cov 70%

   1,873 backend tests behind a 70% coverage gate, with iOS TestFlight and Play Store release engineering.

Next came Maidaan, PadleX's multi-sport evolution: padel, badminton, table tennis, futsal, and cricket from a config-driven sport registry instead of code forks, with every phase gated on the padel regression suite.