Lalengi
The backend of a super app for food, groceries, rides and parcels.
I built it end to end, remotely: the architecture, a PostgreSQL schema of 297 tables, the infrastructure and the DevOps. A NestJS API handles every write. A separate WebSocket gateway pushes live events, like a driver moving on the map, to six client apps, and background workers run the queues and scheduled jobs.
NestJS, PostgreSQL, Redis, BullMQ






