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Amazon·Software Engineer·Online Assessment (OA)·Senior

SeniorPending
Jun 2026Remote

Summary

Got the Amazon OA for a senior SDE role and ran into their newer format with two parts: a standard coding problem and a second section where you work inside a full codebase with an AI assistant available. Still not sure exactly what they're grading on in that second part, and a friend who solved both got rejected anyway, so I'm trying to figure out what I'm missing before I sit down to do mine.

Questions Asked (3)

Q1

In the AI-assisted codebase section of the OA, what exactly is being evaluated? Is it how you prompt the AI, your debugging ability inside a larger repo, or just whether the final code works?

Technical Trade-offsAdaptability & Ambiguity
Author's notes

This is the part that's keeping me up.

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AI HintsAI Generated

Suggested Approach

Acknowledge that the AI-assisted codebase section evaluates a combination of skills, not just the final code. Emphasize that Amazon cares about how you leverage AI as a tool while demonstrating core engineering competencies like debugging, code comprehension, and trade-off analysis. Structure your answer to show that you understand the evaluation is holistic, covering prompt quality, debugging within a large repo, and the ability to deliver working code.

Pro tip: Frame your answer around Amazon's Leadership Principles: show 'Customer Obsession' by focusing on delivering correct, maintainable code, and 'Learn and Be Curious' by adapting to AI tools. Avoid claiming AI does the work; instead, highlight how you direct and verify AI outputs.

1. Clarify the evaluation criteria

State that the section assesses multiple dimensions: your ability to effectively prompt AI, debug within a complex codebase, and ensure the final solution works. This shows you understand the holistic nature of the assessment.

2. Highlight prompt engineering skills

Explain that crafting precise prompts to get useful AI suggestions is key, but it's not just about prompting—it's about knowing what to ask and how to iterate based on AI responses.

3. Emphasize debugging in a larger repo

Discuss how you navigate and debug within an existing codebase, using AI to assist but relying on your own understanding of the system to identify and fix issues.

4. Focus on final code quality

Stress that the ultimate goal is working, maintainable code that integrates well with the existing codebase, demonstrating your ability to deliver results.

5. Connect to Amazon principles

Tie your approach back to Amazon's Leadership Principles, such as Insist on the Highest Standards and Deliver Results, to show alignment with company culture.

Key Points to Mention

  • Prompt engineering: crafting effective prompts and iterating with AI
  • Debugging within a large codebase: using AI as a tool but applying your own problem-solving skills
  • Code comprehension: understanding the existing code and how AI suggestions fit
  • Trade-off analysis: deciding when to use AI vs. manual coding
  • Final code quality: ensuring the solution works, is maintainable, and meets requirements
  • Adaptability: handling ambiguity and integrating AI into your workflow

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q2

A candidate solved both sections of the OA but still got rejected. What hidden factors might Amazon be screening for beyond correctness, such as edge case handling, code style, time taken, or AI usage patterns?

Algorithms & Data StructuresAdaptability & Ambiguity
Author's notes

This is the thing that got me.

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AI HintsAI Generated

Suggested Approach

Acknowledge that passing the OA is only a baseline; Amazon evaluates many signals beyond correctness. Structure your answer by grouping hidden factors into categories: code quality, problem-solving process, efficiency, and integrity. Emphasize that these factors reflect Amazon's Leadership Principles, especially Customer Obsession, Ownership, and Learn and Be Curious.

Pro tip: Mention that Amazon's automated grading often includes hidden test cases and code style checks, and that recruiters review your OA session for signs of AI assistance or excessive time on trivial parts. Show you understand that the OA is a holistic evaluation, not just a pass/fail test.

1. Acknowledge the gap between correctness and hiring

Start by stating that solving both sections correctly is necessary but not sufficient; Amazon looks for multiple signals of engineering excellence.

2. Identify technical hidden factors

Discuss edge case handling, code readability, modularity, naming conventions, and efficiency (time/space complexity) as key technical screens.

3. Consider process and behavioral signals

Explain that time taken per problem, debugging approach, and comments can indicate problem-solving maturity and adaptability.

4. Address integrity and AI usage patterns

Note that Amazon monitors for AI-generated code (e.g., unusual syntax, lack of personal style) and may flag sessions with suspicious patterns like instant perfect solutions.

5. Tie back to Amazon Leadership Principles

Conclude by linking these hidden factors to Amazon's Leadership Principles, showing that the OA is designed to assess cultural fit and long-term potential.

Key Points to Mention

  • Edge case handling: testing for null inputs, large inputs, and boundary conditions.
  • Code style: consistent formatting, meaningful variable names, and modular functions.
  • Time management: solving efficiently without rushing or spending too long on one problem.
  • AI usage detection: avoiding copy-paste solutions or unnatural code patterns that trigger plagiarism checks.
  • Complexity analysis: optimizing for time and space, and explaining trade-offs in comments.
  • Amazon Leadership Principles: demonstrating Ownership, Customer Obsession, and Learn and Be Curious through code and process.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q3

Has anyone recently passed this OA format and moved on to interviews? What should candidates focus on to avoid common pitfalls?

Adaptability & Ambiguity
Author's notes

Throwing this out there mostly because I can't find a single recent data point.

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AI HintsAI Generated

Suggested Approach

Acknowledge that while you can't speak to recent candidate experiences, you can share a structured strategy for tackling Amazon's OA. Focus on understanding the assessment's core components (coding, work simulation, logical reasoning) and emphasize preparation through practice and Amazon's Leadership Principles.

Pro tip: Treat the work simulation as seriously as the coding section—it's designed to test your alignment with Amazon's Leadership Principles, especially Customer Obsession and Ownership. Practice articulating your thought process in ambiguous scenarios, as this mirrors the adaptability required in the role.

1. Clarify the OA Format

Briefly outline the typical structure of Amazon's OA: coding challenges (often 2 problems), work simulation, and logical reasoning. This shows you've done your research.

2. Prioritize Coding Proficiency

Emphasize the need to practice data structures and algorithms, focusing on Amazon's frequently asked topics like arrays, strings, trees, and dynamic programming. Use platforms like LeetCode and aim for optimal time/space complexity.

3. Master the Work Simulation

Explain that the work simulation assesses behavioral fit through scenarios. Advise practicing with Amazon's Leadership Principles in mind, choosing responses that reflect customer obsession, ownership, and bias for action.

4. Avoid Common Pitfalls

Highlight pitfalls: rushing through problems without reading carefully, ignoring edge cases, and underestimating the work simulation. Stress time management and thorough testing.

5. Leverage Available Resources

Recommend using Amazon's official practice assessment, online forums (e.g., LeetCode Discuss, Reddit), and mock tests to simulate the actual experience and reduce anxiety.

Key Points to Mention

  • Amazon's Leadership Principles are integral to the work simulation—align your answers with them.
  • Practice coding under timed conditions to improve speed and accuracy.
  • Read each problem statement carefully and consider edge cases before coding.
  • The work simulation often presents ambiguous situations; choose responses that demonstrate ownership and customer focus.
  • Utilize Amazon's official practice assessment to familiarize yourself with the format.
  • Seek recent candidate experiences on platforms like LeetCode and Reddit for updated insights.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.