Process of interview on hiring event in Kiev. 1. They schedule time for performing an algorithmic task. You should solve small problem, cover it with unit tests in 1 hour. Some problems are simple, some are more difficult. 2. If you correctly fullfill the task they schedule time for main part: 4 interviews in a set for 45 mins each. No questions on specific language. They are interested only in your understanding of data structures (deep knowledge of hash tables, graphs, lists) and your ability to solve algorithmic problems (problems for uni directional nodes, working with rows of String data, finding paths in matrix and so on), understanding of big-O notation. Database design questions may be asked. Also they pay attention to your previous experience - you always need to be prepared to answer what was the most excited project, your worst experience, the project where you made great mistakes... And the give you time to ask them questions about Amazon WS. They listen and fix what and how you ask. And give you quite long and interesting answers.