Status: 2yr Exp SDE
Position: L2 at Twilio
Location: Bengaluru
Date: March 2022

Week 0
Applied via refferal, got callback in a couple of days.

Week 1
OA (Hackerrank, 120 mins)

1. Provided list of logs of format <sender> <receiver> <amount> and number k return all users who have participated in atleast k transactions.
2. Make HTTP GET request to a API and get some details
3. Maximum path sum between any two nodes in an n-ary tree.

Result: Passed. Got confirmation for next round on the same day.

Week 2
Coding Round (Hackerrank, 45 mins)

1. Course Schedule.

Result: Passed. Took a week for confirmation

Week 3
Technical Screening (this was supposed to be the previous round)
Lots of general tech and few system design questions

• Tasks at current job
• Experiences with cloud based microservices
• Handling API secrets
• Experiences with scaling
• Design service to handle 10k qps to return static HTML page. More requirements added iteratively (single DB query, global availability, rate limiting)
• Reject all requests over 10k qps
• Delete millions of records in DB without downtime

System design round
Design URL shortner and follow up.

Result: Failed. Received rejection in a week.