Case Studies

Architecture write-ups of production systems: the problem, the design and the trade-offs.

• Double-entry ledger with CQRS projections

  Ship a ERP

  A multi-tenant ERP built around an immutable double-entry ledger, with every AI feature metered and governed through a single gateway.

  • Laravel
  • React
  • Inertia.js
  • PostgreSQL 15
  • Redis
  • Laravel Horizon
  • Laravel Reverb
  • Docker
  • AWS ECS

• Queue-driven fulfillment with nightly batching

  Ship a Postcard

  Design, pay for and mail real postcards: AI artwork, a developer API and a nightly batch engine that hands orders to a commercial print network.

  • Laravel 13
  • React 18
  • Inertia.js 2 (SSR)
  • MySQL
  • Stripe
  • AWS S3
  • Lob
  • OpenAI