The interview process can vary significantly across their practices and at different levels.
I interviewed for this mid-level Appian position. For a more senior role, the technical questions will likely be more system-oriented than Appian object-specific. I was asked to apply to both positions, so I took the interview as a senior developer. If the interview were purely for a mid-level position, it would be quite intense and a bit difficult.
The overall process was quick, as they were hiring to staff the project quickly. From the day the recruiter initially spoke with me in a meeting to a finalized offer, including a holiday in the middle, it took around two and a half weeks, let's say three. If I move faster on the last round, we can wrap this up in two.
My recruiter, Mirella, has been super quick and available throughout the process.