I applied through an employee referral. The process took 2 weeks. I interviewed at PerimeterX (Tel Aviv-Yafo) in Nov 2019
Interview
HR interview (0.5 hour), Head of Research group interview (1 hour), home task (3~ hours), VP R&D interview (1 hour). Three weeks total. Very nice and professional people. Looks like a good place to work in. Have a good reputation.