APIs
How to build the export endpoints customers reach for during migration, audit, BI, and account-closure scenarios. The async job pattern, format choice, completeness contract, and the patterns that fail.
APIs
The dual-algorithm rollover pattern that lets receivers update on their schedule, the v1=/v2= header format every signature scheme should ship with, and the deprecation window B2B SaaS customers can plan around.
Engineering
Rate limiting is one of those features that seems simple until you try to build it well. The basic idea — restrict how many requests a client can make — is straightforward. The details are where it ge