I highly value Codility's pivot toward modern engineering workflows, particularly its transition to a native VS Code-powered environment that allows candidates to use multi-file navigation, a real terminal, and debugging tools. To address the rise of generative AI, their new narrated, animated video tasks successfully prevent simple prompt copy-pasting, forcing candidates to actually process problems conceptually. Furthermore, rather than blindly blocking AI, their configurable GenAI assistant lets teams monitor and evaluate how effectively an engineer uses AI for problem decomposition and code verification. Finally, features like full interview session replays and the integrated Excalidraw whiteboard layer make reviewing a candidate's genuine troubleshooting loop and system design capabilities seamless.

The fact of being web based helps a lot, so that the candidates don't need to install any software nor the interviewer. The code highlighting for code interview and the graphical tool for system design interviews are also very good. There is no delay on the interactions.

I had a test with it and I couldn't see anything I like on this platform