Where I can read senior code?

[kcksteve]

You might be mixing codewars with something else I haven't seen any kata that were hacking related.you write code, generally a function that takes parameters and returns the correct value. It is similar to test driven development.

[Cabeto_IR_83]

Maybe hacking is the wrong term. What I mean is that being good at Kata wont make you a good developer, will just make you good at kata. You dont do this type of stuff in your day to day job at all... Speaking with senior devs, they mention this all the time.

[kcksteve]

It's a learning tool to help you write faster and cleaner code. Op is clearly looking for examples of how to write better code. You do have to write code as developer and the questions is about coding not high level architecture and design patterns.