There is a huge variety of scientific jobs. You could work in the industry or at a university (like me), or you could be a teacher or scientific journalist. All of these are good jobs, and what you want to do depends on your own preferences. If you have a good science degree, it should be fairly easy to get a good job that you enjoy doing.
It’s just like Arttu says, there are so many to choose from. I can only go from my own experiences, but I’d recommend experimental science if you enjoy hands on experiments and national laboratories? There’s no need to specialise until after your first science degree though and by the end of that you should have a good idea of what you’d like to try out, especially as there’s lots of opportunities to gain experience at university.