After applying online I was contacted by someone in HR. He was extremely prompt and professional and never kept me waiting for replies. We did an initial phone screen--as is typical in the industry, to make sure that I could hold a basic conversation--and then shortly afterward set up a technical phone screen with an engineer. The engineer was also very professional and I liked his interview-style a lot: essentially he had my GitHub up in front of him and he just asked me questions about my own work. I had to withdraw from the application process for personal reasons (entirely unrelated to the company or position), but the next step would have been an in-person interview, which they invited me to very promptly after the technical phone screen. Overall, very professional and enjoyable.