I was approached by a recruiter on LinkedIn. We had a phone conversation, and then an interview was scheduled for 10 days later.

The interview took a little more than an hour and involved a team manager, HR, and myself. First, we had a general talk about them – what they do – and me – what's driving me to change careers.

Then came the technical part. It wasn't tough, but boy, I had underestimated the importance of being rock-solid prepared for fundamental CS questions.

What is a logarithm?

What is O(n) complexity?

What is polymorphism?

How can you find the least common root of two numbers in a binary tree?

Could you sketch an algorithm for this (on paper)?

Got a homework assignment:

Write and deploy a web-based 3D Tic-Tac-Toe game featuring a JS frontend, user registration, and game persistence across sessions.