Their process is very straightforward. 1. Initial call with the recruiter (30 min) I made an initial call with the recruiter to talk about why I am looking for a job, why I applied Mollie, etc... It was a classical recruiter call. 2. Hackerrank Test It had 3 questions, first was a very simple SQL query about GROUP BY. Second was a question called Binge Watching, you can google it. The Third was to write a function to collect all data from the REST endpoint that exposes data via pagination and filter that data in memory. 3. Code Review (1 hour) They have a dummy PR for review. They want you to tell what you will comment in PR. It was a REST controller that has no proper testing, requirements partially implemented, and not following SOLID principles. 4. System Design (1 hour) They ask you to design a wallet system so that customers can send credits to other customers. Also, they can deposit some credits from their bank account. It will be more than enough if you check Payment System and Wallet System from Alex Xu's System Design Interview book. It feels like in this stage they have an approved design, so even if you propose a better design than their approved design they won't like it. 5. Mollie Values (1 hour) This is a basic cultural fit interview. There is nothing special. In the end, they rejected me because of Code Review round. I think it is unfair to spend my time doing two more interviews. Also, all of the developers in the interview looked down on me. They were behaving like they are better developers than me since they are working at Mollie.