Backend

CouchDB data modeling: what belongs in a document

Decide what a CouchDB document owns, then choose IDs, relationships, indexes, partitions, security boundaries, and deletion rules that fit that decision.

Oct 19, 202611 min read

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.

Aug 20, 202616 min read

Domain-Driven Design in TypeScript

Connect the domain model to tenant-safe persistence

Learn where DDD repositories end and infrastructure safeguards begin when enforcing tenant isolation in a shared-schema database.

Aug 13, 202618 min read

Domain-Driven Design in TypeScript

Coordinate long-running work with domain events

Learn how domain events, a transactional outbox, and a process manager let a DDD workflow resume tenant onboarding after failures.

Jul 28, 202615 min read

Domain-Driven Design in TypeScript

Protect business rules with aggregates and value objects

Learn how tactical DDD uses an aggregate root, entities, and immutable value objects to keep an enterprise seat-allocation rule true.

Jul 14, 202621 min read

Durable Work in Postgres

Optional extension: build a small workflow engine in Postgres

When a service-local process outgrows one queue row, add explicit workflow state, step scheduling, timers, signals, and versioning.

Jun 11, 202618 min read

Durable Work in Postgres

Diagnose a slow Postgres work queue

Separate claim-query cost, handler capacity, hot keys, and transport limits before changing queue technology.

Jun 4, 202615 min read

Durable Work in Postgres

Reference: schema, support queries, and guarantee tests

The Postgres schema, operational queries, and tests used to inspect and verify the durable-work implementation.

May 28, 202620 min read

Durable Work in Postgres

Cross-service handoffs

Transactional outbox, transport choices, webhooks, contracts, and when brokers fit. Work that leaves your database commit.

May 22, 202612 min read

Durable Work in Postgres

Production controls

Lease renewal, fencing, graceful drain, and housekeeping for Postgres-backed durable work after order:9182 ships.

May 8, 202618 min read

Durable Work in Postgres

Stable worker affinity with consistent hashing

Use fixed database buckets, a consistent-hash ring, and live membership when work benefits from staying on the same process.

May 1, 202620 min read

Durable Work in Postgres

Many workers

Multi-worker contention, delivery guarantees, and per-key ordering before consistent hash.

Apr 24, 202615 min read

Durable Work in Postgres

Crash recovery

Leases, lease cleanup, at-least-once delivery, and handler idempotency for Postgres inbox workers.

Apr 18, 202612 min read

Durable Work in Postgres

The claim loop

Minimal Postgres claim loop: enqueue, SKIP LOCKED claim, complete, and handler retry with an interactive simulation.

Apr 11, 202615 min read