Got an email within a week, need to do an online test in 3 days, then first round phone screening: basic computer science concepts including C++, OS, hardware and background checking.

There was a general meeting with everyone prior to the individual interview. One on one, lasted for 45 minutes. Asked generally about my resume, projects I've worked on, what I wanted to get from all this, general interview questions. Then this is followed by some technical questions. At the end was told about what IBM does and given chance to ask questions. Very casual overall.