Node.js & TypeScript for Interviews

Most TypeScript interviews go wrong before a single line of code is written. The candidate knows the syntax but misses the deeper mechanics: how JavaScript actually executes, why this behaves differently in arrow functions, what the event loop is doing while your await pauses, or how to build an LRU cache without reaching for a library.

This course is for engineers who already write TypeScript day-to-day and want to perform at their best under interview conditions. We start with the JavaScript runtime that TypeScript compiles down to, move through TypeScript's type system as a tool (not a ceremony), cover every major algorithm pattern you will encounter, build data structures from scratch, practice async and concurrency patterns specific to Node.js, and finish with the live-coding and take-home skills that separate candidates who pass from candidates who almost pass.

Every lesson uses working TypeScript code, Mermaid diagrams you can redraw on a whiteboard, and annotated walkthroughs of real interview problems.