Comment by bereft_orange

If you don't have an idea for a project (I totally didn't), find an open source project that you like, start contributing to it and get to the point where you can get accepted as a core developer / maintainer. It can be a great way to show that you have chops (and you end up doing many things that are important dev skills, like code reviews, API design, handling a legacy codebase, etc.). Plus, it's fun and can be a good way to meet people.