Jump Trading Systems Engineer interview questions

1) Quick phone interview with easy question. 2) Codility test, 3 questions: 2.1) "change exactly one line to fix this code" - buggy question - had to do it in Python because you couldn't do it cleanly in C 2.2) write some code 2.3) document some code No results were given, no feedback from Jump except for "it was enough" 3) 3x 1h interviews: 3.1) interview with a person who wasn't prepared for the interview, had no idea about nearly anything on my CV and the whole hour was about me explaining to him what's Kubernetes or Docker. Ending with "We're out of time, do you have any questions?" 3.2) An interview with two kind developers who would quiz me with brainteasers (?) 3.3) An interview with a developer who gave me a decent algorithmic task to implement. He was kind and the atmosphere was good. 4) "We will not proceed with the interview and we will not provide you with a feedback." 5) I received an e-mail from a third party to give Jump feedback about the interview process.