Lessons Learned Modularising a Large Ios App

I’ve always been interested in how codebases change over time: as teams grow, more code gets added, but it also makes the system more complex and more difficult for a new starter to understand. As engineers we strive to build our systems in a way that makes it easy to extend and add new features (without breaking existing functionality). In recent years, one of the ways to help teams move fast is to move people into “vertical”/feature teams and have them focus on specific domains of the business.