Amazon L5 | Interview Experience | Offer

Leetcode discuss has helped me a lot in prepping for recent interviews at both Amazon and Atlassian, and so this is a way if giving back. Hopefully, it helps someone else too!

Previous Company: US Travel PBC

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Interview Rounds

R0 - OA New Pattern. 1 DSA Question and then a full fledged project setup with pre-written test cases. You have to find the buggy, or missing pieces of code and complete them in a modular way to make all tests pass. Time constraint and developer mindset is the most challenging part of this new Pattern.

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R1 - LLD Design a Notification System. Multiple Channels like SMS, E-Mail. Multiple Users with configured channels. Factory, Strategy, Singleton Pattern. Error Handling and extensibility.

Standard LP

Verdict: Not bad. But could've been better. -> Hire

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R2 - DSA Multiple Scale ups to a Base Problem.

1. Given a Grid, find the minimum steps to reach the Bottom right cell from top left one, given Obstacles in the grid as well.
2. Minimum Steps to reach bottom right, if you can remove at most K obstacles
3. Minimum obstacles to remove so that you can reach bottom right in minimum steps.

Similar to: https://leetcode.com/problems/shortest-path-in-a-grid-with-obstacles-elimination/description/

30 Minutes LP and Project Discussion Only 30 Minutes to Solve these Problems. Brutal Time Management.

Verdict: Strong Hire

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R3 - HLD Design a Job Scheduler. Single Run Jobs + Periodic jobs. Data Schema, Tables. High level Design for scalability. Database Choice (MongoDB vs Dynamo and why?), Queue System vs In-Memory System. Kafka integration and error handling. Expected Depth and maturity in answers and relentless pushback on loose responses until i tightened them with concrete backing logic.

Verdict: Strong Hire

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R4 - Bar Raiser 30 Minutes of grilling on current project in form of LP. Depth, Impact, What I learnt and how I changed the org for good.

A DSA + LLD Problem

void upvoteSongByOne(string songName, string artistName);
void getTopKSongs(string artist);

A set-based LogK solution was required. The discussion became a little confusing and unclear but was able to end on a good solution.

Verdict - Lean Hire

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My recuiter pushed in the HC Debrief based on the flawless DSA round and got the offer within a week of the last round.

Leadership Principles are a must. They can make or break your candidature all by themselves. Standard DSA + LLD + HLD prep enough to clear these. Practice to manage time and talking out loud while coding really helped me get my competence accross to the interviewers.