I applied to the Dev Tools position at NumberFour AG back march 2015. I got very quick feedback after submitting my application. A cool and professional HR handled my application and guided me through the process. Had to go through an initial questionnaire and afterwards a coding challenge. I found the process amusing and I had the flexibility to decide when to do it as those were offline. After that, an initial interview with HR took place and then with the manager of engineering. Both interviews were in a respectful and relaxed tone, where I felt the third-party was trying to be as honest as possible. My major concern where some negative online reviews, but with transparency I was shown that actions where taken in order to address some of major historical issues. It felt like the company had a "restart" and now they are doing things well, demonstrated by the dramatic reduction of employee turnover. I meet the engineering team at Berlin (cozy, modern, and centric office in Mitte), was interview by some of then and even did a presentation. It was clear the company was trying to make sure they were to hire the right person, by making sure I would get along with my future colleagues. The office breathes innovation and creativity, and there are some very skilled engineers and researchers. I'm very happy with the whole application process, I felt treated like a human being and that communication was transparent.