All projects
  • In development

Relay

An offline-first AI messaging engine for small business: scheduled SMS/WhatsApp campaigns and a 24/7 AI auto-responder.

Stack

  • TypeScript
  • Expo · React Native
  • Hono
  • Drizzle
  • PostgreSQL
  • Twilio

Links

Source

What I built

  • A properly multi-tenant backend with per-tenant query scoping, IDOR guards, idempotency keys, and server-side plan gating.
  • 95 tests, with Postgres run in-process (PGlite) so CI needs zero infra, plus an honest SECURITY.md threat model.

TODO(content): full case study (problem → approach → outcome) coming. The card metadata above is migrated verbatim from the live site.