Resume-projects round plus HLD round on Kafka, Postgres/MongoDB internals and a notification system design

Gurgaon, HaryanaSept 20250by Anonymous

Application

I applied through a recruiter. I interviewed at Zomato (Gurgaon, Haryana)

Interview

The interview process first round involved questions on the projects mentioned on resume. Also in the ending gave me the review what was my mistakes in both the hld and questions he asked.

Interview questions [1]

Question 1

Kafka partitions and consumer based questions. How indexing is done in postgres? Why Mongodb is faster than postgres?Then asked to explain notification app system design and also create HLD for the same.

The loop · 2 rounds

Round 1 - Resume Projects

Deep dive into projects listed on resume

Round 2 - HLD / System Design

Kafka partitions and consumers, Postgres indexing, Postgres vs MongoDB performance, notification system HLD; interviewer gave direct feedback on mistakes

Shared Jul 2026