I applied through an employee referral. The process took 2 months. I interviewed at Splunk in Jan 2017
Interview
Applied through employee referral.
First, there was a simple online coding problem that took around 20 mins.
Then, there was 20 min phone call interview by a manager.
Finally, there were 4 technical interviews, 30 mins each - onsite or on skype.
Haven't heard back yet.