YouGov Senior Software Developer interview questions

I was given an automated evaluation project to add features to a dummy project. The code itself was messy. I added a YAGNI solution to it not to avoid messing it too much. I thought it was part of a collaboration with a real interviewer. But it was final. They were expecting clean code and SOLID principles and I should have done drastic changes to the code instead.

I liked the Interview process. One HR person from the UK approached me from LinkedIn. He asked me about my total years of experience, technical skillset, current & expected hike, the reason for switching and expected hike, etc. The next day only he mail me regarding my skype interview with a Development Manager and Director. The interview was pretty long, lasted for 1.5 - 2 hours of discussion. Maybe they were also testing my patience level and my interest in the job and role. The manager asked mostly about my past experiences, about my projects and technical questions. The director asked me mostly managerial questions and was curious about my working mentality and my past experiences in leading and mentoring a team. Trust me these were the toughest managerial questions I have faced in my experience. The technical questions were also tough and very nice. They were alternately asking questions, like 15 mins of technical questions, then 15 mins of managerial questions. But it was more of a discussion, not an interrogation, so it was not exhaustive at all. Lastly, they said HR will get back to me soon (Like everybody says). After a few days, the HR mailed me regarding when can I join and they are happy to offer me the role. I needed a week's vacation from my last working day in my previous organization before I join YouGov because I was stressed with work. And they understood and happily agreed. Head's up: My interview was a one-day event. I am not sure how many rounds do others had to go through. It depends on many things, like teams, experience, role, etc.