A Paradise Code product2026GameWeb app or websiteMobile app

Hokm & Shelem

Two classic Persian card games on one shared engine.

Four-player Hokm and Shelem as installable PWAs: online tables with coins and levels, LAN play over WebRTC, and offline play against three bot levels.

Hokm Shelem

Our role

Game engine, server and PWA

Challenge

Fair play means no client may ever see anyone else's cards.

Solution

An authoritative server that sends each seat only its own hand, with an engine and protocol shared by both games.

Features

Online, LAN and offline
A hard bot using PIMC search
Friends and leaderboards

Engineering notes

01Our own WebSocket signaling relay for WebRTC
02A shared Zod protocol package

Stack

React
Vite PWA
Fastify
WebSocket
WebRTC
PostgreSQL + Drizzle
Zod
Docker

Impact

Two products from one engine

Gallery

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