MediOne

The client runs several pharmacy branches, each with its own stock in Odoo. Customers had no way to see what a branch carries, order it, or know when a delivery would arrive, and couriers had no shared view of the orders they were carrying.

A NestJS modular monolith where every module is split into domain, application, infrastructure and presentation layers. Customers sign in with a phone number and one-time code, browse a branch-aware catalogue, check out with a map-picked address, and watch the order move on a live map. Background work runs in a separate BullMQ worker built from the same Docker image.

• Foundation phase shipped: authentication, catalogue, cart, orders with status history, courier simulation and health checks.
• Every pull request runs the test suite against real PostgreSQL 16 and Redis service containers in GitHub Actions.
• Customer app talks to the API through types generated from the backend's OpenAPI document, so contract drift fails the build.

• Phone number and one-time code sign-in with refresh tokens, login history and lockout
• Catalogue and stock per branch
• Cart and checkout with an address picked on a map inside the delivery zone
• Delivery fee and free-delivery threshold in Djibouti francs
• Order status history with a live tracking map
• Idempotent order creation so a retried request never places two orders
• Push notifications through Expo
• Offline-friendly query cache that survives app restarts

One API and one worker process from a single image, backed by PostgreSQL, Redis and MinIO. The mobile app keeps the map renderer behind an adapter so it can be swapped.

• Environment validated with Zod at boot, so a missing secret stops the process before it serves traffic
• Correlation IDs, rate limiting, caching and structured pino logs in the HTTP layer
• MikroORM v7 migrations, pinned to Node 24 after tracing module-identity failures under Jest on older Node versions
• MapLibre native module behind a map adapter interface, built with EAS development clients
• Docker Compose stack for PostgreSQL, Redis and MinIO, with the API and worker behind an opt-in profile