Building the Backend for a Project Management Tool — Express, Prisma, and the Mistakes I Made Along the Way

I'm currently completing a Full Stack Development internship with CodeAlpha, and the first project is a collaborative project management tool. Think stripped-down Trello/Asana users create projects, invite members, organize tasks across boards, assign them, comment on them, and get real-time updates via Socket.io.

Before touching the frontend, I spent considerable time getting the backend right. This post documents exactly what I built, the patterns I now understand at a deeper level, and the specific mistakes I caught while writing every line myself.

The Stack

Express.js — HTTP server and routing

Prisma — ORM for database queries