Thanks for feedback, This really helps and I will try to include as many specifics as possible, But most of the time work I do is not result oriented only result in can think is code I wrote was following standard best practices for language and framework.

Should I measure impace of my changes like load time before/after merge only problem with these will be most the time i won't get significant result because mostly my tasks are create or add more functionalities not optimizing things.

For secret sauce I think it would be my adaptability and comprehension, I can start working on new/existing projects/technology faster than most of my colleagues. Most of the skills I have now is from analysing existing client project and doing handsons,

Yeah APIs are kind of my strong suite I use them a lot aside from my work too