This. And salary ranges. Honestly. It is a big waste of resources for everyone involved to go through a hiring process only to discover there will be a mismatch during the different steps or in the end because not everything was disclosed upfront.
Many of us have been part of both sides of the process and we assume there is a necessary level of professionalism and transparency here. We also understand that companies and people have different requirements which is totally OK. Just an extra sentence or two with a relevant summary goes a long way and will speak highly of your company!
"Who is hiring" replies have tighter length restrictions than regular comments. There frequently isn't enough space. Previously, when I posted ads, I did the kind of thing you're suggesting by having a following reply with additional details. I was asked to stop.
How many:
- technical phone screens
- video interviews
- projects (esp. length and duration, paid/unpaid, etc)
- portfolio / code reviews on past projects
- onsite interviews and if there's any whiteboarding/pairing/etc
And the total amount of time you expect interviewing to take?
Candidates need the ability to compare positions, processes, etc.