How to Be a Bitcoin Core Developer

For applications, I think their focus is very different. It's much more UX and security than back-end focused work that needs to integrate into a company's back-end in some fashion. For protocol development, you should definitely take a look at the mailing list. And if you don't want to participate in our five-week program, looking through the collection of talks and articles for our Bitcoin protocol developer seminar is a great resource.