The Heart of B3: Building the Matching Engine with RabbitMQ, Redis and Spring Boot

Hello everyone! Continuing the My Broker B3 series, we've reached one of the most anticipated components of the ecosystem: the B3 Matching Engine API . In the previous post, we built b3-market-sync-api which synchronizes real prices from brapi.dev and stores them in Redis. Now it's time to use that data — this is the service that simulates the stock exchange itself, deciding whether a buy or sell order will be executed or rejected based on the prices we just put in cache. 🏗️ What is the Matchin