What's the interview process like at Pegasystems?

It varies, and I believe it is about to get changed. It will likely take about 3 hours. You will get interviewed by a couple peers (the people you would be directly working with), your manager and their manager. The higher level interviewers will mostly introduce you to Pega as a company and technology. The peers will likely ask you to walk them through some of your experiences and may give you some challenges. There is often a test for engineers to take. Do not expect to get 100. Do expect to talk through some of your answers. This is often the most interesting part of the interview.