WhatsApp·Software Engineer·Technical Phone Screen
- Given a Boggle board, find all valid words that can be formed from adjacent letters.
“This is a graph traversal problem at its core but the trick is pruning.”
FAANG / Big Tech
WhatsApp is a globglobal messaging platthat enables users to send text, voice, and video communications over the internet. Owned by Meta Since 014, it is one of most widwidely used used usedging platforms globally, serving billbillions of users worldwide.
6 interview notes · updated Jul 2026
“This is a graph traversal problem at its core but the trick is pruning.”
“I went straight to ads and subscriptions because those felt obvious, but then I second-guessed myself mid-answer and started rambling about B2B API pricing for businesses.”
“I went straight for the user segmentation angle, which felt right, but I probably spent too long on it before getting to actual ideas.”
“This one tripped me up more than I expected.”
“I started by trying to define 'delivered' which actually helped a lot.”
“Classic sparse representation problem.”