It was a 3 stage interview, first 2 were video interviews where you record yourself answering questions and some behavioural questions . You were given around a week to do each video one. You have around 2 minutes for each question.

I applied to a Software Developer position in the team that deals with the NextGen ticketing system. I went to three rounds, all focusing on different aspects of programming: Algorithms, Databases and Web. It was good, the questions were pretty meaningful and relevant to what it sounds like they are working on. I liked the questions around runtime complexity. Mostly the questions are on either programming techniques or specific application uses, like "how do you do X in this database?" People were very friendly. You can tell it's a bit of a government-affiliated entity the way they work (not in a bad way, it's just different than, say, a corporation).