When a new software developer joins bunq, a Dutch bank, (s)he will need some time to get familiar with the existing codebase. Preferably, the time necessary for the familiarisation is as short as possible. The faster the developer is up to speed, the faster (s)he can contribute to new features and help solving bugs. This research develops a prototype for a tool that aims to support developers in the comprehension of the PHP backend of bunq. This tool has been evaluated by interviewing multiple developers. Furthermorewe asked the developerswhether the toolwould be able to replace a senior developer regarding question asking. During the interviews feedback was acquired on the current prototype. New developers found the tool useful, although there was also room for improvement. More experienced developers indicated that they found the tool less useful, but saw opportunities to use the tool for more managerial-like tasks.