// the find
quickfixgo/quickfix
The Go FIX Protocol Library :rocket:
QuickFIX/Go is a Go port of the QuickFIX engine, implementing the FIX Protocol (versions 4.0–5.0SP2) for trading system connectivity. It's for developers building order management systems, algo trading infrastructure, or broker connectivity layers that need to speak FIX — the dominant messaging protocol in institutional equities and futures markets.
Spec-driven code generation is the right call — you get type-safe message structs for every FIX version rather than hand-rolling tag lookups against magic numbers. The acceptance test suite is shared across all QuickFIX implementations (C++, Java, .NET, Go), which means session-layer behavior is validated against the same scenarios, not just unit-tested in isolation. Multiple session store backends (SQL, MongoDB, disk, memory) give you real deployment flexibility without custom glue code. The devcontainer setup means a new contributor can run the full acceptance suite without fighting Ruby and MySQL installs locally.
886 stars for a library that covers a protocol spoken by virtually every institutional trading venue is suspiciously low — it's not a community problem, it's a niche one, but it means slow issue response and PRs sitting open for months. No native support for FIXP (the binary successor to FIX) or SBE encoding, so if you're targeting low-latency DMA venues that have moved beyond classic FIX over TCP, this won't get you there. The logging options (file and screen only) are primitive for production — you'll want structured log output that feeds into your observability stack, and you'll be writing that adapter yourself. The split across a dozen separate repos (fix40, fix41, fix42...) is annoying dependency management overhead for a Go module ecosystem that already has enough to track.