The interview process in total takes around 1 month. First interview is with HR where they check if you've got a cultural fit with the company. Next, you're given a challenge to be solved in a week. You can choose any programming language you feel comfortable with (I'd recommend you to always do that). Then you're going to do some pair programming with two senior engineers who will ask you to make some improvements to your code. You're supposed to collaborate with them as if you were coworkers. I'd suggest not always agreeing with them if you have reasons that support your design decisions, also ask for help if you feel stuck or would like to get some ideas. They won't help you solve the challenge, but they will definitely value that you ask questions. The final interview is with an engineering manager who is going to evaluate your career, accomplishments, etc. The process is very clear from day one and they give you tips for each stage of the process.