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This repository contains resources to learn System Design concepts and prepare for interviews using free resources. ## System Design Fundamentals - [Horizontal vs Vertical Scaling](https://www.spiceworks.com/tech/cloud/articles/horizontal-vs-vertical-cloud-scaling/) - [Content Delivery Network (CDN)](https://www.cloudflare.com/learning/cdn/what-is-a-cdn/) - [Caching](https://medium.com/must-know-computer-science/system-design-caching-acbd1b02ca01) - [Distributed Caching](https://redis.com/glossary/distributed-caching/) - [Latency vs Throughput](https://aws.amazon.com/compare/the-difference-between-throughput-and-latency/) - [CAP Theorem](https://www.bmc.com/blogs/cap-theorem/) - [Load Balancing](https://aws.amazon.com/what-is/load-balancing/) - [ACID Transactions](https://redis.com/glossary/acid-transactions/) - [SQL vs NoSQL](https://www.integrate.io/blog/the-sql-vs-nosql-difference/) - [Consistent Hashing](https://arpitbhayani.me/blogs/consistent-hashing/) - [Database Index](https://www.progress.com/tutorials/odbc/using-indexes) - [Rate Limiting](https://www.imperva.com/learn/application-security/rate-limiting/) - [Microservices Architecture](https://medium.com/hashmapinc/the-what-why-and-how-of-a-microservices-architecture-4179579423a9) - [Microservices Guidelines](https://newsletter.systemdesign.one/p/netflix-microservices) - [API Design](https://abdulrwahab.medium.com/api-architecture-best-practices-for-designing-rest-apis-bf907025f5f) - [Strong vs Eventual Consistency](https://hackernoon.com/eventual-vs-strong-consistency-in-distributed-databases-282fdad37cf7) - [Consistency Patterns](https://systemdesign.one/consistency-patterns/) - [Synchronous vs. asynchronous communications](https://www.techtarget.com/searchapparchitecture/tip/Synchronous-vs-asynchronous-communication-The-differences) - [REST vs RPC](https://aws.amazon.com/compare/the-difference-between-rpc-and-rest/) - [Batch Processing vs Stream Processing](https://atlan.com/batch-processing-vs-stream-processing/) - [HeartBeat](https://martinfowler.com/articles/patterns-of-distributed-systems/heartbeat.html) - [Circuit Breaker](https://medium.com/geekculture/design-patterns-for-microservices-circuit-breaker-pattern-276249ffab33) - [Idempotency](https://blog.dreamfactory.com/what-is-idempotency/) - [Database Scaling](https://thenewstack.io/techniques-for-scaling-applications-with-a-database/) - [Data Replication](https://redis.com/blog/what-is-data-replication/) - [Data Redundancy](https://www.egnyte.com/guides/governance/data-redundancy) - [Database Sharding](https://www.mongodb.com/features/database-sharding-explained#) - [Fault Tolerance](https://www.cockroachlabs.com/blog/what-is-fault-tolerance/) - [Failover](https://avinetworks.com/glossary/failover/) - [Proxy Server](https://www.fortinet.com/resources/cyberglossary/proxy-server) - [Domain Name System (DNS)](https://www.cloudflare.com/learning/dns/what-is-dns/) - [Message Queues](https://medium.com/must-know-computer-science/system-design-message-queues-245612428a22) - [WebSockets](https://www.pubnub.com/guides/websockets/) - [Bloom Filters](https://www.enjoyalgorithms.com/blog/bloom-filter) - [Consensus Algorithms](https://medium.com/@sourabhatta1819/consensus-in-distributed-system-ac79f8ba2b8c) - [Gossip Protocol](http://highscalability.com/blog/2023/7/16/gossip-protocol-explained.html) - [API Gateway](https://www.nginx.com/learn/api-gateway/) - [Serverless Architecture](https://www.datadoghq.com/knowledge-center/serverless-architecture/) - [Service Discovery](https://www.nginx.com/blog/service-discovery-in-a-microservices-architecture/) - [Disaster Recovery](https://cloud.google.com/learn/what-is-disaster-recovery) - [Distributed Locking](https://martin.kleppmann.com/2016/02/08/how-to-do-distributed-locking.html) - [Distributed Tracing](https://www.dynatrace.com/news/blog/what-is-distributed-tracing/) - [Checksum](https://www.lifewire.com/what-does-checksum-mean-2625825) ### [System Design Interview Template](interview-template.md) ## System Design Interview Problems ### Easy - [Design Leaderboard](https://systemdesign.one/leaderboard-system-design/) - [Design URL Shortener like TinyURL](https://www.youtube.com/watch?v=fMZMm_0ZhK4) - [Design Text Storage Service like Pastebin](https://www.youtube.com/watch?v=josjRSBqEBI) - [Design Content Delivery Network (CDN)](https://www.youtube.com/watch?v=8zX0rue2Hic) - [Design Parking Garage](https://www.youtube.com/watch?v=NtMvNh0WFVM) - [Design Vending Machine](https://www.youtube.com/watch?v=D0kDMUgo27c) - [Design Distributed Key-Value Store](https://www.youtube.com/watch?v=rnZmdmlR-2M) - [Design Distributed Cache](https://www.youtube.com/watch?v=iuqZvajTOyA) - [Design Distributed Job Scheduler](https://towardsdatascience.com/ace-the-system-design-interview-job-scheduling-system-b25693817950) - [Design Authentication System](https://www.youtube.com/watch?v=uj_4vxm9u90) - [Design Unified Payments Interface (UPI)](https://www.youtube.com/watch?v=QpLy0_c_RXk) ### Medium - [Design Instagram](https://www.youtube.com/watch?v=VJpfO6KdyWE) - [Design Tinder](https://www.youtube.com/watch?v=tndzLznxq40) - [Design WhatsApp](https://www.youtube.com/watch?v=vvhC64hQZMk) - [Design Facebook](https://www.youtube.com/watch?v=9-hjBGxuiEs) - [Design Twitter](https://www.youtube.com/watch?v=wYk0xPP_P_8) - [Design Reddit](https://www.youtube.com/watch?v=KYExYE_9nIY) - [Design Netflix](https://www.youtube.com/watch?v=psQzyFfsUGU) - [Design Youtube](https://www.youtube.com/watch?v=jPKTo1iGQiE) - [Design Google Search](https://www.youtube.com/watch?v=CeGtqouT8eA) - [Design E-commerce Store like Amazon](https://www.youtube.com/watch?v=EpASu_1dUdE) - [Design Spotify](https://www.youtube.com/watch?v=_K-eupuDVEc) - [Design TikTok](https://www.youtube.com/watch?v=Z-0g_aJL5Fw) - [Design Shopify](https://www.youtube.com/watch?v=lEL4F_0J3l8) - [Design Airbnb](https://www.youtube.com/watch?v=YyOXt2MEkv4) - [Design Autocomplete for Search Engines](https://www.youtube.com/watch?v=us0qySiUsGU) - [Design Rate Limiter](https://www.youtube.com/watch?v=mhUQe4BKZXs) - [Design Distributed Message Queue like Kafka](https://www.youtube.com/watch?v=iJLL-KPqBpM) - [Design Flight Booking System](https://www.youtube.com/watch?v=qsGcfVGvFSs) - [Design Online Code Editor](https://www.youtube.com/watch?v=07jkn4jUtso) - [Design Stock Exchange System](https://www.youtube.com/watch?v=dUMWMZmMsVE) - [Design an Analytics Platform (Metrics & Logging)](https://www.youtube.com/watch?v=kIcq1_pBQSY) - [Design Notification Service](https://www.youtube.com/watch?v=CUwt9_l0DOg) - [Design Payment System](https://www.youtube.com/watch?v=olfaBgJrUBI) - [Design a Digital Wallet](https://www.youtube.com/watch?v=MCKdixWBnco) ### Hard - [Design Slack](https://systemdesign.one/slack-architecture/) - [Design Live Comments](https://systemdesign.one/live-comment-system-design/) - [Design Distributed Counter](https://systemdesign.one/distributed-counter-system-design/) - [Design Location Based Service like Yelp](https://www.youtube.com/watch?v=M4lR_Va97cQ) - [Design Uber](https://www.youtube.com/watch?v=umWABit-wbk) - [Design Food Delivery App like Doordash](https://www.youtube.com/watch?v=iRhSAR3ldTw) - [Design Google Docs](https://www.youtube.com/watch?v=2auwirNBvGg) - [Design Google Maps](https://www.youtube.com/watch?v=jk3yvVfNvds) - [Design Zoom](https://www.youtube.com/watch?v=G32ThJakeHk) - [Design File Sharing System like Dropbox](https://www.youtube.com/watch?v=U0xTu6E2CT8) - [Design Ticket Booking System like BookMyShow](https://www.youtube.com/watch?v=lBAwJgoO3Ek) - [Design Distributed Web Crawler](https://www.youtube.com/watch?v=BKZxZwUgL3Y) - [Design Code Deployment System](https://www.youtube.com/watch?v=q0KGYwNbf-0) - [Design Distributed Cloud Storage like S3](https://www.youtube.com/watch?v=UmWtcgC96X8) - [Design Distributed Locking Service](https://www.youtube.com/watch?v=v7x75aN9liM) ## Must-Read Engineering Articles - [How Discord stores trillions of messages](https://discord.com/blog/how-discord-stores-trillions-of-messages) - [Building In-Video Search at Netflix](https://netflixtechblog.com/building-in-video-search-936766f0017c) - [How Canva scaled Media uploads from Zero to 50 Million per Day](https://www.canva.dev/blog/engineering/from-zero-to-50-million-uploads-per-day-scaling-media-at-canva/) - [How Airbnb avoids double payments in a Distributed Payments System](https://medium.com/airbnb-engineering/avoiding-double-payments-in-a-distributed-payments-system-2981f6b070bb) - [Stripe’s payments APIs - The first 10 years](https://stripe.com/blog/payment-api-design) - [Real time messaging at Slack](https://slack.engineering/real-time-messaging/) ## Books - [Designing Data-Intensive Applications](https://www.amazon.com/Designing-Data-Intensive-Applications-Reliable-Maintainable/dp/B08VL1BLHB/) - [System Design Interview – An insider's guide](https://www.amazon.com/System-Design-Interview-insiders-Second/dp/B08CMF2CQF/) ## YouTube Channels - [Tech Dummies Narendra L](https://www.youtube.com/@TechDummiesNarendraL) - [Gaurav Sen](https://www.youtube.com/@gkcs) - [codeKarle](https://www.youtube.com/@codeKarle) - [ByteByteGo](https://www.youtube.com/@ByteByteGo) - [System Design Interview](https://www.youtube.com/@SystemDesignInterview) - [Success in Tech](https://www.youtube.com/@SuccessinTech/videos)