PracticeDepth

Companies now screen engineers with an AI interviewer before any human reads the application. micro1, HireVue, CodeSignal, Karat, and Mercor all run some version of that round. PracticeDepth is where you rehearse it.

Pick a topic and a difficulty, then answer out loud or by typing. The interviewer follows up on what you actually said rather than reading down a fixed list. Mention that you cached something in Redis and the next question is about invalidation. That depth is what the real screens reward, and it is the part nobody can practise alone.

Sixteen topics are covered: JavaScript, TypeScript, React, Node.js, Python, Go, Java, REST, relational databases, testing, security, real-time, CS fundamentals, DevOps, AI engineering, and machine learning. Difficulty ranges from junior to staff.

Also included: code challenges with line-by-line corrections, CV Defense, where the interviewer questions the claims on your CV, Learn mode for the concepts these interviews keep asking about, and a study plan built from where you lost points.

No subscription. Signing up gives you 200 free credits to try it, and credit packs start at 7 EUR. Every session ends with a scorecard that tells you what to fix.