About this book

A free study book for coding and system design interviews, written and maintained by Nadim Tuhin.

Who wrote it?

Nadim Tuhin is a senior software engineer and tech lead with 14 years of experience building distributed systems, automation platforms and healthcare workflows in TypeScript, Node.js, Go, Python and PostgreSQL. Profiles: nadimtuhin.com, GitHub, LinkedIn.

How is it checked?

Every solution runs against its test cases on every build, and every animation must end on the answer the tested code gives. If one check fails, the site is not published. The source and tests are public at github.com/nadimtuhin/dsa-refresher.

How do I contact you?

Found a mistake or want a topic added? Open an issue on GitHub, or book a short call at calendly.com/nadimtuhin/30min.