backend system design Interview Questions
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Adobe System Design: Scalable Subscription Management
Design a scalable subscription management backend for Adobe-like SaaS: billing, renewals, upgrades, webhooks, access control. Learn architecture patterns, APIs.
Airbnb System Design: Scalable Multi-Channel Notifications
Practice an Airbnb system design: build a scalable, multi-channel notification backend for event-triggered and batch sends. Learn trade-offs and follow-ups.
Anthropic System Design: Stateless Prompt Playground
Design a stateless prompt engineering playground backend for Anthropic: handle 10MB+ prompts, multi-window sharing, streaming LLM calls, and cost/security trade-offs.
Apple System Design: Distributed Task Scheduler in Cloud
Prepare for an Apple system design interview: design a distributed task scheduler for cloud background jobs. Learn queue, task schema, fault tolerance, and scaling.
Atlassian System Design: Scalable Image Crawler Service
Design a scalable image crawler with job-management APIs: recursive crawling, scheduling, deduplication and storage. Atlassian interview guide — prepare now.
Bloomberg System Design: Global News Aggregation & Trending
Design a scalable Bloomberg backend to aggregate global news, handle Newser's regional API limits, compute real-time trending, and serve low-latency feeds.
ByteDance System Design: Reward Backend for High QPS
Design a scalable, fault-tolerant reward backend for ByteDance that handles 10k QPS. Explore caching, rate limiting, load balancing and consistency—study now.
Coupang System Design: Large Video Upload (Backend)
Plan a scalable, fault-tolerant large video upload system with chunked, resumable uploads, object storage and processing. Review trade-offs and interview prep.
Databricks System Design: Multi-threaded Event Logger
Design a multi-threaded event logger: thread-safe, low-latency architecture for high-throughput backends. Covers async batching, durable outputs, and backpressure.
DoorDash System Design: Reliable Scalable Payment Processor
Design an idempotent, available payment processing system for DoorDash-scale e-commerce. Cover architecture, queues, retries, PCI, security, and webhooks.
eBay System Design: Concert Ticketing with Real-Time
Design a scalable concert ticketing backend for eBay: prevent oversells, ensure <100ms reads, integrate social views, and handle peak traffic. Learn the design.
Google System Design: Twitter Hashtag Aggregator Guide
Practice Google's backend system design: real-time Twitter hashtag aggregator. Learn ingestion, aggregation windows, DB trade-offs and interview follow-ups.
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