Either focus deep in some specific business domain you like (or don't hate at least), or focus on becoming a super knowledgeable generalist. In either case it'

Either focus deep in some specific business domain you like (or don't hate at least), or focus on becoming a super knowledgeable generalist. In either case it's better to start with becoming an okay expert in a single domain. Also don't focus too much on tools or leetcode shit, tools will evolve unpredictably in 10y. And FAANG landscape/salaries too. E.g. java, swift, nodjs, LLM is not a domain, it's a tool. But banking transactions, realtime video processing or customer support automation — is.