# SystemRound

> Learn the concepts, practise real problems with honest feedback that tells you exactly what to fix, and always know what to do next, from entry level to staff.

SystemRound is where people prepare for system design interviews: a free learning library, guided practice on real problems with honest feedback that quotes their own words, and a coach that plans what to do next, from entry level to staff.

## Primary pages
- [Home](https://thesystemround.com/)
- [Problems](https://thesystemround.com/problems): system design interview problems to practise step by step, each with a free worked solution, starting with SystemRound 100
- [Learn](https://thesystemround.com/learn)
- [Pricing](https://thesystemround.com/pricing)
- [Blog](https://thesystemround.com/blog)

## Problems
- [Ticket booking](https://thesystemround.com/problems/ticket-booking)
- [URL shortener](https://thesystemround.com/problems/url-shortener)
- [RAG assistant](https://thesystemround.com/problems/rag-pipeline)
- [Rate limiter](https://thesystemround.com/problems/rate-limiter)
- [Chat](https://thesystemround.com/problems/chat)
- [News feed](https://thesystemround.com/problems/news-feed)
- [AI inference gateway](https://thesystemround.com/problems/ai-inference-gateway)
- [Ride dispatch](https://thesystemround.com/problems/ride-dispatch)
- [Video streaming](https://thesystemround.com/problems/video-streaming)
- [Notification service](https://thesystemround.com/problems/notifications)
- [Search autocomplete](https://thesystemround.com/problems/search-autocomplete)
- [Payments ledger](https://thesystemround.com/problems/payments-ledger)
- [Distributed cache](https://thesystemround.com/problems/distributed-cache)
- [File sync](https://thesystemround.com/problems/file-sync)
- [Webhook delivery](https://thesystemround.com/problems/webhooks)
- [Ad-click aggregator](https://thesystemround.com/problems/ad-click-aggregator)
- [Top-K and leaderboards](https://thesystemround.com/problems/top-k)
- [Job scheduler](https://thesystemround.com/problems/job-scheduler)
- [Web crawler](https://thesystemround.com/problems/web-crawler)
- [Content moderation](https://thesystemround.com/problems/content-moderation)
- [Distributed message queue](https://thesystemround.com/problems/message-queue)
- [Feature flags](https://thesystemround.com/problems/feature-flags)
- [Distributed key-value store](https://thesystemround.com/problems/kv-store)
- [Collaborative document editor](https://thesystemround.com/problems/collab-editor)
- [Metrics and monitoring](https://thesystemround.com/problems/metrics-monitoring)
- [Distributed ID generator](https://thesystemround.com/problems/id-generator)
- [Coding practice platform](https://thesystemround.com/problems/coding-platform)
- [Online auction](https://thesystemround.com/problems/online-auction)
- [Flash sale](https://thesystemround.com/problems/product-launch)
- [Nearby places](https://thesystemround.com/problems/proximity-search)
- [Pastebin](https://thesystemround.com/problems/pastebin)
- [ChatGPT-style assistant](https://thesystemround.com/problems/llm-chat-assistant)
- [Food delivery](https://thesystemround.com/problems/food-delivery)
- [Payment gateway](https://thesystemround.com/problems/payment-gateway)
- [Stock exchange](https://thesystemround.com/problems/stock-exchange)
- [LLM inference service](https://thesystemround.com/problems/llm-serving)
- [Subscription billing](https://thesystemround.com/problems/subscription-billing)

## Blog guides
- [How to Practice System Design When Feedback Is Usually Vague](https://thesystemround.com/blog/system-design-practice-with-real-feedback): A practical loop for turning open-ended system design practice into measurable improvement: attempt, checkpoint, study, and retry.
- [The System Design Interview Rubric Strong Candidates Internalize](https://thesystemround.com/blog/system-design-interview-rubric): The core checkpoints interviewers grade in senior system design rounds, from requirements and estimates to data, reliability, and trade-offs.
- [What to Study After a Weak System Design Round](https://thesystemround.com/blog/what-to-study-after-a-system-design-miss): A triage guide for turning a weak system design interview into a focused study plan instead of rereading the same broad resources.
- [A Practical System Design Interview Preparation Roadmap](https://thesystemround.com/blog/system-design-interview-preparation-roadmap): A four-week roadmap for system design interview preparation that balances concepts, problem practice, estimation, and mock interviews.
- [How to Answer System Design Interview Questions Without Rambling](https://thesystemround.com/blog/how-to-answer-system-design-interview-questions): A concrete answer structure for system design interviews: scope, numbers, contracts, data, architecture, scale, failures, and trade-offs.
- [Common System Design Interview Mistakes and How to Fix Them](https://thesystemround.com/blog/system-design-interview-common-mistakes): The mistakes that make system design answers feel weak: vague scope, unused estimates, fashionable components, missing failures, and thin trade-offs.

## Trust and contact
- [How grading works](https://thesystemround.com/evaluation): Against the problem’s rubric at the level you chose, and a rule decides each band. Valid alternatives get credit.
- [Privacy policy](https://thesystemround.com/privacy)
- [Terms of service](https://thesystemround.com/terms)
- [Contact](https://thesystemround.com/contact)
- Email: hello@thesystemround.com

Content is intended for interview preparation and educational use. Practice sessions, results and account pages are private and should not be indexed or used as public source material.