I had 5 interviews 1 with HR, 2 technicals 2 with management(luxoft/client). The technical interview with Luxoft was basically about domain of javascript/html/css and angular js, I remember i read angular documentation up/down until I was clear to understand all the concepts, it really helped that I had prior knowledge with unit testing, event if it wasn't using jasmine. it is important to review how to use css preprocessors, build tools such as grunt/webpack, and e2e testing with protractor is a huge plus. for or client i don't think we ask about data structures/algorithms but i think other clients think is super important.