What is the interview process for Software Engineer at Amazon?

The L6 Software Engineer (SDE III) interview at Amazon is a rigorous process designed to assess a candidate's technical expertise, problem-solving abilities, leadership potential, and cultural fit with Amazon's Leadership Principles. This level typically requires a strong track record of delivering complex projects, mentoring junior engineers, and influencing technical direction.

How many interview rounds does Amazon have for Software Engineer?

Amazon has 4 interview rounds for the Software Engineer position: Coding and Algorithms, System Design, Behavioral and Leadership, Hiring Manager Round.

L6 (SDE III) at Amazon - Interview Guide

Evaluation

What they measure.

Technical depth and breadth in relevant areas (e.g., distributed systems, algorithms, data structures, specific programming languages).
Problem-solving skills: ability to break down complex problems, identify constraints, and devise effective solutions.
System design and architecture: ability to design scalable, reliable, and maintainable systems.
Leadership and influence: ability to drive technical initiatives, mentor others, and influence technical decisions.
Communication skills: clarity, conciseness, and effectiveness in conveying technical ideas.
Cultural fit: alignment with Amazon's Leadership Principles (e.g., Customer Obsession, Ownership, Bias for Action, Dive Deep).

Preparation

How to prepare.

Tips

Thoroughly review Amazon's Leadership Principles and prepare specific examples from your experience that demonstrate each principle.
Practice coding problems, focusing on data structures, algorithms, and object-oriented design. Aim for clean, efficient, and well-documented code.
Study system design concepts for large-scale distributed systems. Understand trade-offs related to scalability, availability, consistency, and performance.
Prepare for behavioral questions using the STAR method, ensuring your examples are specific, quantifiable, and demonstrate impact.
Research the specific team and product you are interviewing for to tailor your answers and questions.
Practice mock interviews to simulate the interview environment and get feedback.
Understand common interview pitfalls and how to avoid them, such as not asking clarifying questions or not explaining your thought process.

Study plan

Fig · Study plan — 04 phases

01 / 04

01

Phase 01 of 04

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms (DSA) fundamentals. Practice Medium/Hard LeetCode.

Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice implementing these in your preferred language and analyze their time and space complexity. Solve LeetCode problems tagged 'Medium' and 'Hard'.

Questions

Commonly asked.

Design a system to handle real-time notifications for a large user base.
Tell me about a time you had to deal with a production issue. What was your approach?
How would you design a distributed key-value store?
Describe a complex technical challenge you faced and how you overcame it.
What are the trade-offs between monolithic and microservices architectures?
How do you ensure the quality and reliability of the software you ship?
Tell me about a time you had to influence a decision that was different from your initial recommendation.
Design a rate limiter for an API.
What are the principles of good API design?
Describe a situation where you had to work with a difficult stakeholder. How did you manage the relationship?

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

Global

Interview focus

Deep dive into system design and architecture for large-scale, distributed systems.Emphasis on leadership and influencing skills, particularly in driving technical strategy.Assessment of ability to handle ambiguity and drive results in a fast-paced environment.Evaluation of cross-functional collaboration and communication.

Common questions

Discuss a time you had to influence a team to adopt a new technology. What was the outcome?
Describe a complex system you designed. What were the trade-offs?
How would you scale a service that is experiencing exponential growth?
Tell me about a time you failed. What did you learn from it?
What are your thoughts on the current state of cloud computing and its future?

Tips

For Seattle/US-based interviews, be prepared for in-depth discussions on distributed systems and cloud architecture. Highlight experience with AWS services.
For international locations (e.g., India, Europe), expect a strong focus on data structures, algorithms, and coding proficiency, alongside system design. Tailor examples to global scalability challenges.
Understand Amazon's specific business context for the role and location. Research recent Amazon news and initiatives relevant to the team.

Rounds

Round-by-round.

Expand a step for evaluation criteria, sample questions, and prep notes.

Hard

Data Structures And Algorithms Interview · 60 min · Software Development Engineer (SDE)

This round typically involves one or two coding problems, often focusing on data structures and algorithms. The interviewer will assess your ability to write clean, efficient, and correct code, as well as your problem-solving approach and communication skills. You'll be expected to explain your thought process, discuss trade-offs, and handle edge cases. This round is crucial for demonstrating your foundational technical skills.

What they look for

Clean, efficient, and correct code.A systematic approach to problem-solving.Understanding of time and space complexity.Ability to explain the solution and its trade-offs.Consideration of edge cases and error handling.

Evaluation

Coding proficiency and correctness.
Understanding of data structures and algorithms.
Problem-solving approach.
Code quality and efficiency.
Ability to communicate technical solutions.

Sample questions

Given a binary tree, find the lowest common ancestor of two given nodes in the tree.
Data StructuresAlgorithmsTreesRecursion
Implement a function to find the k-th largest element in an unsorted array.
Data StructuresAlgorithmsArraysSortingQuickSelect
Design a data structure that supports insert, delete, and getRandom O(1) operations.
Data StructuresHash MapsArraysO(1) Operations

Prep for this round

01Practice coding on a whiteboard or shared editor.
02Focus on explaining your thought process out loud.
03Be prepared to discuss the time and space complexity of your solutions.
04Write test cases for your code.
05Ask clarifying questions about the problem statement and constraints.

Common rejection reasons

×Inability to articulate thought process clearly.
×Lack of depth in understanding fundamental computer science concepts.
×Poor coding practices (e.g., inefficient solutions, unreadable code).
×Failure to consider edge cases or constraints.
×Not asking clarifying questions when needed.

Hard

Architecture And Scalability Interview · 60 min · Senior Software Development Engineer or Principal Engineer

This round assesses your ability to design complex, large-scale distributed systems. You'll be given an open-ended problem (e.g., design Twitter, design a URL shortener) and expected to define requirements, propose an architecture, discuss trade-offs, and justify your design choices. This round heavily emphasizes your understanding of scalability, reliability, and system performance.

What they look for

A structured approach to system design.Consideration of functional and non-functional requirements.Understanding of trade-offs between different design choices.Knowledge of relevant technologies and patterns.Ability to handle ambiguity and make reasonable assumptions.

Evaluation

Ability to design scalable, reliable, and maintainable systems.
Understanding of distributed systems concepts (e.g., consistency, availability, partitioning).
Knowledge of common architectural patterns and technologies (e.g., databases, caching, load balancing, message queues).
Ability to identify and address trade-offs.
Clarity and structure in presenting the design.

Sample questions

Design a URL shortening service like bit.ly.
System DesignScalabilityDatabasesAPIs
Design a system to count the top K trending items in real-time.
System DesignData ProcessingAlgorithmsScalability
Design a distributed cache.
System DesignDistributed SystemsCachingScalability

Prep for this round

01Study common system design patterns and architectures.
02Practice designing systems for various scenarios.
03Be prepared to discuss databases, caching strategies, load balancing, and message queues.
04Clearly articulate your assumptions and design decisions.
05Focus on scalability, availability, and fault tolerance.

Common rejection reasons

×Inability to design scalable and reliable systems.
×Lack of understanding of distributed systems concepts and trade-offs.
×Poorly defined system components or interactions.
×Failure to consider non-functional requirements (scalability, availability, latency).
×Not addressing potential bottlenecks or failure points.

Med

Behavioral Interview · 45 min · Hiring Manager or Senior Team Member

This round focuses on your behavioral competencies and cultural fit with Amazon. You'll be asked questions based on Amazon's Leadership Principles, requiring you to share specific examples from your past experiences using the STAR method. The interviewer wants to understand how you operate, lead, and collaborate within a team, and how you align with Amazon's values.

What they look for

Specific, impactful examples demonstrating Leadership Principles.Ownership and accountability for actions and outcomes.A proactive and results-oriented mindset.Effective communication and collaboration skills.Resilience and ability to learn from mistakes.

Evaluation

Alignment with Amazon's Leadership Principles.
Demonstration of ownership, accountability, and initiative.
Problem-solving and decision-making skills in real-world scenarios.
Teamwork and collaboration abilities.
Communication and interpersonal skills.
Ability to handle ambiguity and drive results.

Sample questions

Tell me about a time you had to make a difficult decision. What was the outcome?
Leadership PrinciplesDecision MakingOwnership
Describe a situation where you went above and beyond for a customer.
Leadership PrinciplesCustomer Obsession
Tell me about a time you had to disagree with your manager or a team member. How did you handle it?
Leadership PrinciplesConflict ResolutionCommunication
Describe a project where you had to take ownership and drive it to completion.
Leadership PrinciplesOwnershipBias for Action

Prep for this round

01Prepare detailed stories for each of Amazon's Leadership Principles using the STAR method.
02Be honest and authentic in your responses.
03Focus on demonstrating impact and learning from your experiences.
04Ask thoughtful questions about the team, culture, and challenges.
05Be prepared to discuss your career goals and motivations.

Common rejection reasons

×Lack of ownership or accountability.
×Inability to provide specific examples for Leadership Principles.
×Poor communication or interpersonal skills.
×Difficulty handling conflict or feedback.
×Not demonstrating a customer-centric approach.
×Lack of initiative or bias for action.

Hard

Managerial And Leadership Interview · 45 min · Hiring Manager or Senior Leadership

This final round, often with the hiring manager or a senior leader, focuses on your leadership capabilities, strategic thinking, and overall fit for the L6 role. You'll discuss your vision for the team, how you handle ambiguity, your approach to mentoring, and your understanding of the business impact of technology. This is your opportunity to showcase your senior-level experience and potential.

What they look for

A clear vision and strategic thinking.Demonstrated leadership and ability to influence.Understanding of how technical decisions impact business outcomes.Ability to mentor and develop other engineers.Strong communication and stakeholder management skills.

Evaluation

Strategic thinking and long-term vision.
Leadership potential and ability to influence.
Understanding of business goals and customer impact.
Ability to manage complex projects and stakeholders.
Mentorship and team development capabilities.
Overall fit for the L6 role and its responsibilities.

Sample questions

What is your vision for this team in the next 1-2 years?
LeadershipVisionStrategy
How do you handle ambiguity and drive results when requirements are unclear?
LeadershipBias for ActionProblem Solving
Describe a time you mentored a junior engineer. What was the impact?
LeadershipMentorshipTeam Development
How do you balance technical debt with delivering new features?
Technical StrategyPrioritizationTrade-offs

Prep for this round

01Think about your vision for a team or a product area.
02Prepare examples of how you've influenced technical direction or mentored engineers.
03Understand the business goals of the team you're interviewing for.
04Be ready to discuss your career aspirations and how this role fits into them.
05Ask insightful questions about the team's challenges and opportunities.

Common rejection reasons

×Lack of strategic thinking or long-term vision.
×Inability to articulate a clear vision for the team or project.
×Poor understanding of business context or customer needs.
×Difficulty in managing or influencing stakeholders.
×Not demonstrating leadership potential beyond individual contribution.

DSA

Coding questions at Amazon.

Frequently reported on Amazon loops

View all at Amazon

L6

What they measure.

How to prepare.

Data Structures and Algorithms

System Design

Behavioral and Leadership Principles

Mock Interviews and Refinement

Commonly asked.

Regional differences.

Global

North America

Europe

Round-by-round.

Coding questions at Amazon.

More at Amazon.