---
title: Amazon Full-Stack Engineer Interview: Questions, Process & Prep (2026)
description: How to prepare for the Amazon Full-Stack Engineer interview in 2026 — the real process, what they screen for, sample questions, and a free AI mock to practice out loud.
url: https://usegreenroom.app/prep/amazon-fullstack-engineer-interview
last_updated: 2026-06-04
---

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Interview Prep · Amazon

# Full-Stack Engineer interview at Amazon: questions, process & how to prepare

How to prepare for the Amazon Full-Stack Engineer interview in 2026 — the real process, what they screen for, sample questions, and a free AI mock to practice out loud.

**Quick answer:** The Amazon Full-Stack Engineer interview runs 4 main rounds: coding, system design, frontend + backend deep-dive, and behavioral. Have 2 STAR stories per Leadership Principle ready. Coding is LeetCode medium; the differentiator is structured, data-backed behavioral answers. Practice each round out loud before the real thing.

## The Amazon Full-Stack Engineer interview process

Online assessment → phone screen → onsite 'loop' (4–6 rounds, each anchored to Leadership Principles) → bar raiser round → debrief.

## What Amazon actually screens for

Every round is mapped to Amazon's 16 Leadership Principles. Behavioral answers in tight STAR format matter as much as coding. The 'bar raiser' is a calibrated interviewer with veto power.

**How to clear the bar:** Have 2 STAR stories per Leadership Principle ready. Coding is LeetCode medium; the differentiator is structured, data-backed behavioral answers.

## Rounds you'll face

- Coding
- System design
- Frontend + backend deep-dive
- Behavioral

## Core topics to master

- API design
- Databases
- React / frontend
- Auth & sessions
- End-to-end system design
- Testing strategy

## Sample Full-Stack Engineer interview questions

These are representative of what comes up for this role. Practice answering them *out loud* — being right on paper isn't the same as explaining your reasoning under time pressure.

- Design a URL shortener end to end — API, storage, and the redirect path.
- How would you handle auth across a React frontend and a stateless API?
- Implement an LRU cache.
- Describe a feature you shipped from database to UI. What broke?

## Frequently asked questions

How hard is the Amazon Full-Stack Engineer interview?

It's a high bar — Amazon applies it to every hire. The hardest part for most candidates isn't any single round but sustaining clear, structured reasoning across all 4 (coding, system design, frontend + backend deep-dive, and behavioral) under time pressure.

How many rounds is the Amazon Full-Stack Engineer interview?

Typically 4: Coding, System design, Frontend + backend deep-dive, Behavioral. Online assessment → phone screen → onsite 'loop' (4–6 rounds, each anchored to Leadership Principles) → bar raiser round → debrief.

What should I study for the Amazon Full-Stack Engineer interview?

Focus on: API design, Databases, React / frontend, Auth & sessions, End-to-end system design, Testing strategy. Then rehearse each round out loud, because explaining your reasoning under time pressure is what's actually scored — not just getting the right answer on paper.

Can I do a mock Amazon Full-Stack Engineer interview for free?

Yes. Greenroom runs a free AI mock interview tailored to the Full-Stack Engineer role, covering coding, system design, frontend + backend deep-dive, and behavioral with follow-up questions and feedback afterward. No card required.

### Practice the Amazon Full-Stack Engineer interview out loud

Greenroom runs a realistic AI mock interview for this exact role — coding, system design, frontend + backend deep-dive, and behavioral rounds with follow-up questions and feedback after. Free to start, no card required.

Start a free mock interview