I applied through an employee referral. The process took 4 days. I interviewed at GridPlus (Austin, TX) in Nov 2020
Interview
You get to talk with the CTO, and usually get on a technical interview with one of the FW engineers + the CTO. This technical interview may involve live coding, which can make it long but everyone is friendly. Alternatively it may be in the take home exercise format, to which you'll be asked some technical questions.
Interview questions [1]
Question 1
Develop a linked in C list than modify it and implement some ordering algorithm.