Micro1 Software Engineer interview: backend and database depth

The Micro1 interview began with React and Node.js fundamentals, then quickly moved into practical backend topics: worker threads, task processing, queues and message services, and using idempotency to make operations safe and repeatable. The discussion continued into distributed systems and PostgreSQL internals, including transactions, isolation levels, concurrency control, query optimization, an…

Shared by a candidate · reported Jul 2026. Interview formats change; use it as a guide, not a script.