How I Built a Real-Time Precious Metals Price Feed for 30,000 Concurrent Users in Laravel

Architecture walkthrough: Laravel Reverb, WebSocket broadcasting, Redis pub/sub, and the tricks that make it hold under real load.

The Problem

A live precious metals trading platform needs to push gold and silver price updates to every connected user the moment a tick arrives — not every 5 seconds via polling, not via a REST endpoint they hammer on a timer. Real-time. Sub-second latency. And it needs to handle 30,000 simultaneous connections without melting.

This post walks through exactly how I built this using Laravel 11, Laravel Reverb, Redis, and a few architectural decisions that made the difference between a demo and something production-ready.

Stack

• 
  Laravel 11 + PHP 8.2


• 
  Laravel Reverb — self-hosted WebSocket server (replaces Pusher)


• 
  Laravel Echo — frontend WebSocket client


• 
  Redis — pub/sub backbone + cache


• 
  Laravel Horizon — queue worker monitoring


• 
  MySQL 8 — OHLCV candle storage with covering indexes

Full source:

Includes: models, events, jobs, services, Filament 3 admin panel, Docker Compose, migrations, and a price simulator.

Tags: #laravel #php #websocket #redis #architecture