Architecture, distributed systems, event-driven design, and the craft of principled software engineering.https://engineering.david-hayes.com/https://engineering.david-hayes.com/blog/build-your-own-webhook-transport/https://engineering.david-hayes.com/blog/build-your-own-webhook-transport/How to build a webhook registry and delivery system on Postgres using outbox rows, delivery attempts, signatures, retries, and inbound inbox rows.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/00-introduction/https://engineering.david-hayes.com/blog/durable-work-postgres/00-introduction/How to implement common queue and messaging patterns in Postgres: competing consumers, transactional outbox, idempotent handlers, leases, and dead letters.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/01-claim-loop/https://engineering.david-hayes.com/blog/durable-work-postgres/01-claim-loop/Minimal Postgres claim loop: enqueue, SKIP LOCKED claim, complete, and handler retry with an interactive simulation.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/02-recovery/https://engineering.david-hayes.com/blog/durable-work-postgres/02-recovery/Leases, lease cleanup, at-least-once delivery, and handler idempotency for Postgres inbox workers.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/03-workers/https://engineering.david-hayes.com/blog/durable-work-postgres/03-workers/Multi-worker contention, delivery guarantees, and per-key ordering before consistent hash.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/04-partitioning/https://engineering.david-hayes.com/blog/durable-work-postgres/04-partitioning/Consistent hash, heartbeats, rebalance windows, and multi-worker simulation with ring ownership.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/05-production/https://engineering.david-hayes.com/blog/durable-work-postgres/05-production/Lease renewal, fencing, graceful drain, and housekeeping for Postgres-backed durable work after order:9182 ships.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/06-shapes/https://engineering.david-hayes.com/blog/durable-work-postgres/06-shapes/How to choose inbox, outbox, projection, CDC, and saga patterns when implementing durable work in Postgres.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/07-handoffs/https://engineering.david-hayes.com/blog/durable-work-postgres/07-handoffs/Transactional outbox, transport choices, webhooks, contracts, and when brokers fit. Work that leaves your database commit.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/08-operations/https://engineering.david-hayes.com/blog/durable-work-postgres/08-operations/Full Postgres schema, inbox SQL, observability, testing, and schema evolution for order:9182.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/09-performance/https://engineering.david-hayes.com/blog/durable-work-postgres/09-performance/Claim-path tuning, indexes, and an interactive performance tuner for Postgres claim loops.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/10-workflows/https://engineering.david-hayes.com/blog/durable-work-postgres/10-workflows/How to extend a Postgres durable queue into a simple durable workflow engine with workflow definitions, step scheduling, timers, signals, and versioning.Thu, 02 Jul 2026 00:00:00 GMThttps://engineering.david-hayes.com/blog/durable-work-postgres/11-enterprise-patterns/https://engineering.david-hayes.com/blog/durable-work-postgres/11-enterprise-patterns/How Postgres durable work fits with DDD, domain events, transactional outbox, event sourcing, CQRS projections, sagas, CDC, and workflow engines.Thu, 02 Jul 2026 00:00:00 GMT