Backend Intern - Node.js & Express

The service you will work on

MailerMen's campaign delivery service pushes several million emails a week, and its Express API is the thing every other team calls. Over three months you sit inside that team and take ownership of a slice of it: the template rendering endpoints, the per account rate limit middleware, and the audit log that records who changed which campaign.

What a normal week looks like

Mondays start with a short design chat where you sketch a route contract before writing a line of it. You then implement it, write Jest tests around the happy path and the two failure modes nobody remembers, and open a pull request that a senior backend engineer reads line by line. Expect blunt feedback, and expect to argue back when you disagree.

By the end

You will have shipped at least four endpoints to production, debugged a real N+1 query against a PostgreSQL table holding a few hundred thousand rows, and learned to read a flame graph without panicking. Two days a week you work from the Bengaluru office and the rest from wherever suits you. No prior job experience is expected. Curiosity about how a request actually travels through a server is.