React is the frontend winner, Vue is good if you look for work in startups, Angular if you're more into enterprise work. Backend... matter of taste. And each l

React is the frontend winner, Vue is good if you look for work in startups, Angular if you're more into enterprise work. Backend... matter of taste. And each local / regional market is different. PHP has always been big and it has been making good strides technically (use Symfony or Laravel as a first framework). Python is also a safe bet, Django and Flask are good framework options. Java Spring Boot and C# are good options if you want to work with larger companies. Node is also a good choice in terms of marketability, but I personally prefer one of the "conventional" back end frameworks. Rust, Go, Haskell, Svelte, Phoenix / Elixir might be exciting, but in terms of market opportunities, it's still relatively small compared to the above. Maybe for when you have more expertise in 2 or 3 of the above.