artifacts/

Two-factor authentication has a reputation for being cryptographic magic. The common case is forty lines of code. This page builds it from nothing — a working authenticator you can watch…

The nine things a Go service is actually built out of — structs, embedding, interfaces, enums, generics, goroutines, channels, mutexes, waitgroups. Each one is worked three times: the…

Every box in a system diagram is there because something broke. Step through the build and watch each one break: the load balancer, the session store, the index, the cache, the replicas…