NestJS

Tricia Digital Academy: an e-learning platform for digital marketing education - 10 formal design documents (UML, class responsibility, exception policy), then a test-covered NestJS/Prisma/PostgreSQL backend delivered through AI-agent task branches with CI, Husky gates, and Dockerized environments.

A NestJS/MongoDB financial-system backend - users, accounts, transactions, role-based access - with unit and e2e tests, Sentry/Loggly observability, and a TypeDoc API reference deployed as its own documentation site.