I applied through college or university. The process took 1 week. I interviewed at PerkinElmer (Waltham, MA) in Nov 2015
Interview
Initial call to discuss skills and interests
Skill based online programming challenge (coding--similar to hacker rank)
onsite 3 rounds --Drilling on resume, projects, user experience
Projects review in detail
Challenging test for the given time
Need to be fast enough to come up with a solution and code satisfying all the test cases.
1 xml parsing based coding question
Interview questions [1]
Question 1
How do you manage when you need to get help from other teams