Intro phone call that lasted about an hour. Was 50% questions, 50% company overview and interviewer's career history.
Next is an online coding test done through HackerEarth, probably the worst algorithm site available for testing in C#. Instructions say "You will be given an array, but you should expect to receive the array through a Console.Read, which turns it into a string (ie. "["5","0","1","14","2","8"]") which is a whole lot different than receiving a simple string[], like the instructions tell you. The instructions also say, "Build a function that..." when you're really expected to create an entire console app, including the "using System; etc." that you may need in order to execute your function.
The algorithm is an easy one to solve, but working with HackerEarth's horrible system turns a 5-minute problem into a nightmare to complete in 45 minutes.
After the online coding test, you'll have an on-site interview which pretty much lines up with the description from some of the other comments.
My advice to you, get used to HackerEarth's deplorable system. Do more than just the practice test before taking the actual test. Despite what the initial instructions tell you, you ONLY get to use C# for the actual assessment, so don't bother practicing with any other language. Make sure to complete a practice test that has you return each of the main datatypes (strings, ints, lists, arrays, objects), just to make sure you feel confident using HackerEarth's broken system.