Given a coding task, not overly complex but stated a good testing approach and clean design. I completed the task, meeting every criteria requested exactly. Beyond the brief in some aspects I would say. Then got a no, with no feedback whatsoever. Never got a 'no' for a technical test before in my life. No opportunity to explain or defend any technical decisions. If they were looking for a particular style (efficiency, simplicity, testing, etc) they could have just asked. But despite meeting their task brief to the letter, I get nothing. Gave the impression of a flippant attitude, and a disregard for the candidates time. Wouldn't waste my time ever applying there again..

30 min phone interview, informal chat, plus a trivial programming question. Following that, a simple coding exercise (but they requested I do it in a language not mentioned on my CV - presumably to test my ability to pick up something new.) After that, a 2 hour face to face, firstly a leetcode style whiteboard problem (though no actual coding), followed by a systems question. No feedback or further questioning on the coding exercise, and no questions about my CV or experiences.