Amazon.
The Amazon.com retail marketplace, Prime Video, Alexa and AWS cloud services.
its questions lean on
- service design
- notifications
- object-oriented design
- scalability
- availability
The rounds, as candidates describe them
Reported by candidates
From public interview write-ups; each links its source.- Design a Notification SystemSystem designIP-06 · Design a Notification System →W06 · DAY 01 · Notification Platform — Problem Understanding & High-Level Design →W06 · DAY 02 · Core Notification Flow →reported in:LeetCode Discuss · Amazon SDE-2 interview experience, bar raiser HLD (2025) ↗LeetCode Discuss · Amazon SDE2 Hyderabad, offer (2022) ↗
- Design a URL ShortenerSystem designIP-01 · Design a URL Shortener →W01 · BOSS · Design a URL Shortener at Scale →reported in:LeetCode Discuss · Amazon SDE2 interview experience (2024) ↗
- Design PastebinSystem designIP-12 · Design Pastebin →SQ-08 · AWS S3 →reported in:LeetCode Discuss · Amazon SDE2 interview experience (2024) ↗
- Design a File Sync ServiceSystem designIP-10 · Design a File Sync Service (Dropbox / Google Drive) →SQ-08 · AWS S3 →reported in:LeetCode Discuss · Amazon L5 (SDE2) Seattle, "Design Dropbox" (2022) ↗
- Design a Ride-Hailing ServiceSystem designSQ-09 · Uber →IP-13 · Design a Proximity Service →reported in:LeetCode Discuss · Amazon SDE-2 L5 interview experience (2021) ↗
- Design a Chat SystemSystem designIP-08 · Design a Chat System →SQ-02 · WhatsApp Messaging →reported in:LeetCode Discuss · Amazon SDE 2, WhatsApp with sent/delivered/read (2021) ↗
- Design a Distributed Job SchedulerSystem designIP-17 · Design a Distributed Job Scheduler →W02 · DAY 05 · Distributed Cron & Job Scheduling →reported in:LeetCode Discuss · Amazon SDE 2 Bangalore (2022) ↗
- Design an IoT Sensor Data PlatformSystem designW08 · DAY 01 · Event Ingestion at Scale →IP-15 · Design a Metrics Monitoring and Alerting System →W03 · DAY 03 · Backpressure and Flow Control →reported in:LeetCode Discuss · Amazon SDE2 AWS Seattle, sensors for farmland (2024) ↗LeetCode Discuss · Amazon SDE2 Seattle, air-quality sensors across cities (2021) ↗
- Design a Parking LotLow-level designLLD-01 · Design a Parking Lot →reported in:LeetCode Discuss · Amazon SDE-2, hiring manager LLD round (2025) ↗LeetCode Discuss · Amazon SDE2 Bangalore, concurrent parking garage (2022) ↗
- Design SplitwiseLow-level designLLD-06 · Design a Bill-Splitting App (Splitwise) →reported in:LeetCode Discuss · Amazon SDE 2 interview experience (2024) ↗
- Design a Vending MachineLow-level designLLD-07 · Design a Vending Machine →reported in:LeetCode Discuss · Amazon SDE-2 Hyderabad, offer (2020) ↗
- Design a Customer Loyalty Points ProgramLow-level designW02 · DAY 02 · Idempotency in Practice →IP-20 · Design a Payment System →reported in:LeetCode Discuss · Amazon SDE 2 India, Amazon Fresh loyalty program (2025) ↗
- Design a Collaborative Document Editor (LLD)Low-level designSQ-20 · Google Docs Collaboration →W05 · DAY 04 · Conflict Resolution →reported in:LeetCode Discuss · Amazon SDE 2 Bangalore, offer (2024) ↗
Likely, from what they build
Our pick, not a report: questions that fit Amazon's products.- Design an E-commerce Flash SaleSystem designW02 · BOSS · The Ultimate System Design Interview →W01 · DAY 04 · Hot Keys and Skew →W04 · DAY 03 · Thundering Herd →
Study path
An ordered path through the course for Amazon, and why each step is there.
- 01W04 · BOSSDesign a Global E-Commerce Product Catalog Systemthe product catalog interview
- 02W04 · DAY 05Multi-Tier Cachingcaches at every layer and invalidating them
- 03SQ-08AWS S3object storage at planet scale
- 04W03 · BOSSEvent-Driven Food Delivery Order Systemevent-driven order processing
- 05W05 · DAY 05Leader Election and Coordinationleader election and fencing
- 06W10 · DAY 01SLIs, SLOs and SLAsSLIs, SLOs and error budgets
- 07W10 · DAY 04Capacity Planningcapacity planning for peak sales
- 08W10 · DAY 05Incident Managementincident management and postmortems
- 09LLD-02Design an LRU Cachea classic coding/LLD warm-up
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