Building a Trade Matching Engine from Scratch in Go

Every exchange — whether it trades stocks, crypto, or commodities — has a matching engine at its core. It is the component that takes buy and sell orders, finds compatible pairs, and executes trades. Despite being so fundamental, the inner workings of a matching engine are rarely discussed in the open. Most implementations live behind proprietary walls. This article walks through MatchEngine, an open-source order matching engine written in Go. We will cover the core algorithm, the data structur