Psychometric test and job insight test followed by programming test on codility. Three questions were available in multiple languages, but two were in JavaScript & JS React only. I need more words

The whole process took 3 weeks and went through 4 stages. The first stage was a phone interview with HR. I was asked basic questions relating to why I wanted to work there and so on(no technical stuff). The phone interview with the woman from HR was very pleasant and easy. The second stage was a phone interview with one of the senior engineers. This time I was asked more technical questions relating to software engineering. The third stage was the code production stage. I was sent a brief and was asked to develop a small application so they could get a feel for my programming abilities and style. And after all that I was finally invited for a face to face interview with two of the companies senior software engineers. This last interview stage was split into two parts. The first part was just sitting down and having a chat with the two engineers about the code I had produced earlier and just talking about different technologies. I really enjoyed this part as we were having a proper chat and it felt like I was talking to some friends from University and not like I'm being interviewed for a job. The second part was an aptitude test. This part was slightly less enjoyable since the test requires you to concentrate very hard for a very long period of time, but at the same time It was not very difficult and quite thought provoking.