I applied online. The process took 2 weeks. I interviewed at WePay (Seattle, WA) in Apr 2017
Interview
HackerRank Online challenge given to take in a week. Can't say much more because I couldn't solve the challenge all the way, but all I can say is prepare well for coding challenge.
I applied online. The process took 2 weeks. I interviewed at WePay (San Francisco, CA) in Sept 2015
Interview
I applied through Linkedin. They had initial phone screening followed by two phone interviews. The entire process took 2-3 weeks. All the questions were based on web security and cryptography. Its good to know some concepts on OAuth. Many others were from your resume. The role is focussed more on application security and pen testing. Code reviews will help you a lot.
Interview questions [1]
Question 1
Differentiate XSS and CSRF. What are the protection mechanisms. Describe SSL handshake. How does OAuth work. The second interview focussed more on session management.