Coin ClashCoin Clash

01

The product

Coin Clash ("Skill matches. Real stakes. Fair play.") is a competitive mobile gaming platform from Saverr IO LTD. Players are matched in real time, enter tournaments, join guilds, climb leaderboards and earn referral bonuses. A wallet handles deposits and bank withdrawals, and support and admin consoles run the operations side.

02

The problem

Competitive mobile play needs low-latency matchmaking. When money moves through it, the platform also needs strong guarantees around payments, withdrawals and fair play, plus the operations tooling to support players.

03

My role

Co-founder2026

• Co-founder: product direction, scope and launch planning, together with my co-founder.
• Full-stack engineering across the Expo mobile app and the FastAPI backend (the majority of commits in the shared repository).
• Payments and withdrawals with Paystack, real-time matchmaking over WebSockets, and CI/CD to AWS.

04

Engineering approach

1. 01A FastAPI service with domain routers (auth, game, matchmaking, tournaments, guilds, leaderboards, wallet, support, admin) on an asyncpg connection pool.
2. 02Defence-in-depth middleware: security headers, request-size limits, cache-control rules and a strict CORS allow-list.
3. 03Pushes to the backend path deploy automatically to EC2 through GitHub Actions.

05

Architecture

06

Key decisions

07

Technologies

• Expo
• React Native
• Expo Router
• TypeScript
• TanStack Query
• Python
• FastAPI
• WebSockets
• PostgreSQL
• asyncpg
• Paystack
• Docker
• AWS EC2
• GitHub Actions

08

Outcome

• ◆Live at coinclash.live, published by Saverr IO LTD with Paystack payments. The game itself sits behind sign-in.