A 'top developer' is a relative term. I used to be a top developer few years back at my startups coding and developing interfaces, backend, APIs and everything in between. I would understand design, database and UI, as well as the best implementation methods and optimize code. However, there were times, when you just had to release something and get things done. So, my perspective, a 'top developer' is the CEO of development who can get things done and still think of scaling and long term viability of the code.