codefreq

I am interested to do some part-time freelancing in DevOps, CloudOps, Developer productivity. I am also good at application development and have developed few android + web apps.

Can the community suggest me few websites (no freelancer, upwork, toptal since I already have accounts for almost a year without any luck) or any other methods which I can get contacts?

I am appearing for Amazon's interview and the JD states that I need to have good understanding about LLD and HLD. Can someone suggest websites/books/other resources for understanding the same?