They post jobs on Accenture's job board since Navitaire is an wholly owned Accenture company. Recruiter of company will contact you after you have applied, then a phone interview with a manager, then series of face to face interviews and they will usually return in a week with an answer for you. Its pretty fast and well organized.
Interview questions [1]
Question 1
Mostly about OOPS logic, C# skills, abstract classes and interfaces