Amazon SDE-2 Interview Experience - Selected
Sharing my recent Amazon SDE-2 interview experience.
Online Assessment
Difficulty: Medium
DSA: A medium-difficulty problem centered around prefix and suffix sums. The challenge was not computing the arrays, but applying additional logic on top of them.
AI Repository: Navigate a real codebase using an AI assistant, identify a business-logic bug causing failing tests, and manually implement the fix. AI could help explore the project but not generate the final patch.
Focus: DSA, debugging, code understanding, and effective AI usage.
Round 1 – DSA + Leadership Principles
Difficulty: Medium
Problem 1: Given histogram bar heights, find the largest rectangular area formed by consecutive bars. Expected optimal solution: monotonic stack.
Problem 2: Given a grid with positive and negative values that increase/decrease your power, find the minimum initial power needed to safely reach the bottom-right cell without power dropping to zero.
Focus: Stacks, DP, optimization, complexity explanation, and LPs.
Round 2 – System Design + Leadership Principles
Difficulty: Hard
Question: Design an Attendance Management System for hourly employees. The interviewer intentionally gave almost no constraints and expected the candidate to gather requirements, define assumptions, design APIs, data model, event flow, scalability, consistency, failure handling, and observability.
Focus: Requirement clarification, proactive discussion, scalability, trade-offs, and failure handling.
Round 3 – LLD + Leadership Principles
Difficulty: Medium
Question: Design a terminal-based file search utility. It should support searching by attributes such as name, size, extension, etc., and allow complex queries combining filters using logical AND/OR. The focus was on an extensible object-oriented design.
Focus: Clean OOP, extensibility, and Specification/Composite-style design.
Bar Raiser
Difficulty: Medium
Problem 1: Given a valid time (HH:MM), find the next 'good time'. After a brute-force solution, the discussion shifted toward a cleaner production-quality implementation.
Problem 2: Find a common element present in every sorted row of a matrix. The interview emphasized progressing from brute force to an optimized approach and clearly communicating the reasoning.
Focus: Correctness, optimization, production-quality code, and LPs.
Key Takeaways
- Leadership Principles were discussed in almost every round.
- Explain your thought process clearly.
- Start with a correct solution, then optimize.
- Clarify requirements before system design.
- Discuss trade-offs, failures, scalability, and observability.
- Amazon evaluates problem solving, communication, and production thinking — not just coding.
Hope this helps anyone preparing for Amazon SDE-2 interviews.
Comp - https://leetcode.com/discuss/post/8448320/amazon-sde-2-l5-hyderabad-3-yoe-compensa-v5id/
