Round 1: OA
1 Medium and 1 Hard. Both of them were already discussed in lc discuss posts related to paypal.

Round 2 (1 Hour):

1. k closest points to origin
2. Find maximum sum path in a tree
3. An array medium question (can't remember)

Round 3 (1 Hour):
System Design round. Extensive discussion on a lot of topics related to scaling. In last 10 mins ask to do class design of E-commerce.

Round 4 (1 Hour):
HM round. Standard questions. Discussion on projects and role.

Got an offer.
https://leetcode.com/discuss/compensation/2062204/Paypal-or-SDE-3-or-Bangalore