By default, the admin user can acces to special features of "developer mode" , for example: Manage Views, Edit SearchView, Edit Action, Edit Worflow and Print Workflow from the combobox in the top.

How do you able those "developer mode options" for other user (not admin)?

See the picture:

https://pbs.twimg.com/media/B8D4KEEIIAAfQLq.png:large

I duplicated the user admin with same permissions to test that but doesn't work. The duplicate user only can acces to these options: View Log (perm_read), Set Defaults, JS Tests, View Fields, Fields ViewGet and Manage Filters.