ENGINEERING NOTES
Notes on backend systems, application modernization, testing, and the engineering decisions behind maintainable software.
A generalized design for reliable document-processing workers that separates durable intake, idempotent stages, bounded retries, and operator-owned dead-letter recovery.
A guide to moving persistence and authorization tests toward small database-backed fixtures while retaining fast unit tests at genuinely isolated boundaries.
A boundary-focused design for using Redis to revoke otherwise valid JWTs and enforce atomic API rate limits without confusing the two policies.
A practical framework for moving a legacy application toward a modern stack through explicit seams, reversible routing, and incremental ownership.
A measurement-led approach to making data-heavy APIs smaller by returning intentional fields, paginating work, and applying compression at the right boundary.
