# designgurus.io

> AI-optimized mirror of designgurus.io containing 50 pages totalling 73,194 words of clean markdown content, structured data, and semantic HTML. Original source: https://designgurus.io. Last updated: 2026-09-11T04:03:37.890Z.

Each page is available as HTML (with JSON-LD structured data) and Markdown (text-only, ideal for LLMs and RAG).

## Homepage

- [Design Gurus: System Design & Coding Interview Prep Courses](/content/site-root.html): Design Gurus is the tech interview prep platform built by ex-FAANG hiring managers. Get courses, mock interviews, and resume reviews to land your dream job. Start free. (801 words)

## Articles & Blog Posts

- [How to Learn System Design? | Learn System Design](/content/learn-system-design/how-to-learn-system-design/index.html): This is a complete guide to learn system design and prepare for system design interviews, structured for engineers at every level. Whether you're a junior engineer (633 words)
- [REST vs GraphQL vs gRPC: Differences, Performance, and When to Use](/content/blog/rest-graphql-grpc-system-design/index.html): REST, GraphQL, and gRPC compared: how each one works, the performance trade-offs, and a decision rule for picking one in a system design interview. (1,809 words)
- [Essential Software Design Principles (SOLID) – Must-Knows Before Your Interview](/content/blog/essential-software-design-principles-you-should-know-before-the-interview.html): Learn essential software design principles for interviews like SOLID, DRY, and KISS. Master clean, scalable coding practices interviewers expect you to know. (4,383 words)
- [Back-of-the-Envelope Estimation: A Step- by-Step Guide for System Design Interviews](/content/blog/back-of-the-envelope-system-design-interview/index.html): Master back-of-the-envelope estimation for system design interviews: QPS math, storage sizing, bandwidth calculations, and the powers-of-2 shortcuts interviewers love. (2,300 words)
- [Problem Sets | Design Gurus](/content/problemset/index.html) (971 words)
- [Load Balancer vs. Reverse Proxy vs. API Gateway: Demystifying Web Architectures](/content/blog/load-balancer-reverse-proxy-api-gateway/index.html): Discover the differences between load balancer, reverse proxy, and API gateway, and learn how to choose the right tool for your application. (2,712 words)
- [RabbitMQ vs Kafka vs ActiveMQ: A Complete Guide to Choosing the Right Message Broker](/content/blog/rabbitmq-kafka-activemq-system-design/index.html): Kafka vs RabbitMQ vs ActiveMQ compared: throughput, delivery guarantees, use cases, and the decision framework senior engineers use to pick the right message broker. (3,366 words)
- [Java Map Explained – Master Key-Value Data Structures Fast](/content/blog/what-is-java-map-class-and-its-uses/index.html): Learn what Java Map is, how it works, and when to use it. Includes examples, key methods, and best practices for working with Map in Java. (1,278 words)
- [10 Top LeetCode Patterns to Crack FAANG Coding Interviews](/content/blog/top-lc-patterns/index.html): Master the 10 most important coding patterns (Two Pointers, BFS/DFS, DP, etc.) to crack FAANG interviews. Learn how to recognize and apply each pattern with examples. (664 words)
- [14 Most Popular Amazon Coding Interview Questions (LeetCode-Style)](/content/blog/amazon-14-question/index.html): Practice the 14 most common coding interview questions asked at Amazon. Get familiar with these frequently asked problems and improve your chances of standing out in Amazon’s hiring process. (1,405 words)
- [Meta Coding Interview Questions | Design Gurus](/content/problemset/company/meta/index.html): Practice Meta coding interview questions with real problems asked in Meta technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Meta interview. (281 words)
- [Comparing DevOps, SRE, Platform Engineering, and Software Engineering](/content/blog/devops-sre-platform-engineering-software-engineering.html): What are the difference between DevOps, SRE, Platform Engineering, and Software Engineering. (1,969 words)
- [Cache Invalidation: Methods, Strategies, and Trade-offs](/content/blog/cache-invalidation-strategies/index.html): Cache invalidation is removing or updating cached data once the original changes. Here is why it is hard, the methods that do it, and how to pick one. (1,277 words)
- [NoSQL Databases in System Design: When to Use Them and Why](/content/blog/nosql-databases-system-design/index.html): When should you choose NoSQL over SQL? Complete guide to NoSQL types (key-value, document, column, graph), use cases, trade-offs, and system design interview answers. (819 words)
- [CAP Theorem vs PACELC: Understanding Distributed System Trade-offs](/content/blog/system-design-interview-basics-cap-vs-pacelc/index.html): The CAP theorem explained — and why PACELC is the better framework for modern distributed systems. With database examples, interview questions, and trade-off analysis. (2,330 words)
- [Google System Design Secrets: Insider Tips and Strategies for Acing Your Interview](/content/blog/google-system-design-interview-prep/index.html): Unlock the Key Principles, Essential Concepts, and Proven Tactics to Stand Out in Your Google System Design Interview (1,534 words)
- [System Design Interview Guide – 7 Steps to Ace It](/content/blog/step-by-step-guide/index.html): Confused by system design interviews? Follow this 7-step framework to structure your answers like a pro. Perfect for FAANG prep and 2025 interviews. (921 words)
- [Beginner's Guide to Object-Oriented Programming (OOP)](/content/blog/object-oriented-programming-oop/index.html): Object-oriented programming for beginners: classes, objects, and the four pillars explained with simple examples, plus interview FAQs. (1,538 words)
- [What Is Recursion? An Overview.](/content/blog/what-is-recursion/index.html): Unlocking the Power of Recursion: A Guide for Software Engineers. (1,837 words)
- [Designing APIs for AI Agents](/content/course-play/grokking-modern-api-design-interview/doc/designing-apis-for-ai-agents/index.html): A human developer reads an operation description, chooses an endpoint, writes code, tests it, and deploys it. An AI agent may make that choice again for every job. (489 words)
- [How to Design a RESTful API: Resources, Methods, and Status Codes](/content/blog/what-is-restful-api/index.html): A step by step guide to designing a REST API: model resources, pick HTTP methods, shape requests and responses, handle errors, paginate, and version safely. (1,664 words)
- [How to Design a URL Shortener: A Step-by- Step System Design Walkthrough](/content/blog/url-shortening/index.html): Design a URL shortener (like TinyURL or Bit.ly) step-by-step: requirements, capacity estimation, hash generation, database schema, scaling, and common interview trade-offs. (718 words)
- [LeetCode Coding Patterns Unlocked: Top Strategies to Ace Coding Interviews](/content/blog/leetcode-coding-patterns/index.html): Discover the Most Effective Strategies and Techniques to Master Challenging LeetCode Questions and Excel in Coding Interviews. (1,500 words)
- [Microsoft Coding Interview Questions | Design Gurus](/content/problemset/company/microsoft/index.html): Practice Microsoft coding interview questions with real problems asked in Microsoft technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Microsoft interview. (303 words)
- [CDN Architecture in System Design: How Content Delivery Networks Work](/content/blog/content-delivery-network-cdn-system-design-basics/index.html): A CDN is a network of edge servers that serve content from a location near the user. Here is how CDN architecture works, how requests are routed, and how caching is handled. (1,555 words)
- [Amazon System Design Interview: 6 Sample Questions & How to Solve Them](/content/blog/system-design-interview-amazon/index.html): Preparing for Amazon system design interviews? This guide covers 6 example questions with answers: e-commerce, messaging, web crawlers, and more, plus tips to impress Amazon interviewers. (645 words)
- [Don’t Just LeetCode: Follow Coding Patterns for Smarter Prep](/content/blog/dont-just-leetcode/index.html): Tired of grinding through endless LeetCode problems? Discover a smarter way to prepare. Learn how focusing on core coding patterns can make your interview prep more effective, efficient, and far less overwhelming than brute-force practice. (502 words)
- [How to Learn System Design — A Roadmap by Career Level | Design Gurus](/content/learn-system-design/index.html): A complete roadmap for learning system design — calibrated by career level from junior to staff engineer. Covers the foundations (primitives), patterns, and how to practice with real interview-style design problems. (636 words)
- [Conclusion: What You Now Know, and Where to Go Next](/content/course-play/grokking-modern-api-design-interview/doc/conclusion-what-you-now-know-and-where-to-go-next/index.html): The course began with a simple claim: An API design interview is not a test of how many endpoints you can name. It is a test of whether you can turn caller jobs (492 words)
- [10 Must-Read System Design Papers for Engineers (2026)](/content/blog/sys-design-papers/index.html): The system design research papers actually worth your time in 2026: what each one teaches, the order to read them in, free links to every paper, and how to turn them into interview answers. (1,091 words)
- [Amazon Coding Interview Questions | Design Gurus](/content/problemset/company/amazon/index.html): Practice Amazon coding interview questions with real problems asked in Amazon technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Amazon interview. (320 words)
- [7 Tips to Stand Out in Your System Design Interview](/content/blog/sys-design-distinguishes/index.html): 7 tips to stand out in a system design interview: how to frame answers, communicate trade-offs, ask clarifying questions, and avoid the mistakes interviewers flag. (450 words)
- [Google Coding Interview Questions | Design Gurus](/content/problemset/company/google/index.html): Practice Google coding interview questions with real problems asked in Google technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Google interview. (306 words)
- [Oracle Coding Interview Questions | Design Gurus](/content/problemset/company/oracle/index.html): Practice Oracle coding interview questions with real problems asked in Oracle technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Oracle interview. (326 words)
- [Concurrency and Conditional Requests](/content/course-play/grokking-modern-api-design-interview/doc/concurrency-and-conditional-requests/index.html): Two support agents read the same order. Agent A changes the shipping instruction. Agent B changes the contact phone number. Each client sends a representation based (494 words)
- [Linkedin Coding Interview Questions | Design Gurus](/content/problemset/company/linkedin/index.html): Practice Linkedin coding interview questions with real problems asked in Linkedin technical interviews. Solve, run, and submit your solutions in our online code editor to prepare for your Linkedin interview. (255 words)
- [Amazon’s 16 Leadership Principles – Behavioral Interview Guide](/content/blog/amazon-leadership-principles-behavioral-interview/index.html): Learn Amazon’s 16 Leadership Principles with real examples and sample behavioral questions. Prepare for your Amazon behavioral interview with confidence. (1,293 words)
- [Chapter Assessment](/content/course-play/grokking-modern-api-design-interview/doc/chapter-assessment-6/index.html): This checks the whole of Chapter 7: what the product architecture round adds, turning a feature into a data model, designing for one screen, offline sync and (496 words)
- [Scalability in System Design: The Complete Guide to Techniques, Patterns & Trade-offs](/content/blog/grokking-system-design-scalability/index.html): Learn key scalability techniques and principles (sharding, replication, load balancing, etc.). and find out how Netflix, AWS, and Google scale systems using real-world techniques. (503 words)
- [Availability | Learn System Design](/content/learn-system-design/availability/index.html): Availability is a measure of how accessible and reliable a system is to its users. High availability is measured as uptime: the ratio of time the system is (690 words)
- [Latency and Performance | Learn System Design](/content/learn-system-design/latency-and-performance/index.html): Latency and performance decide what using the system actually feels like, and they decide how much data and traffic it can carry before it starts to buckle. Three (628 words)
- [9 Best System Design GitHub Repos & Resources](/content/blog/best-system-design-github-resources/index.html): A ranked guide to the best free system design resources on GitHub: the top repositories, what each one is good for, the official Grokking System Design repo, and where free material stops being enough. (603 words)
- [Scalability | Learn System Design](/content/learn-system-design/scalability/index.html): Scalability is the ability of a system to handle an increasing workload, either by adding more resources or by making the existing ones bigger. Those are the two (712 words)
- [25 Fundamental System Design Concepts You Must Know Before Your Interview](/content/blog/system-design-interview-fundamentals/index.html): 25 must-know system design concepts for interviews: caching, load balancing, sharding, CAP theorem, consistency, and more — with examples and interview-ready explanations. (6,899 words)
- [Amazon SDE Levels Explained: SDE I to Principal Engineer, L4 to L8](/content/blog/amazon-sde-levels/index.html): Amazon SDE levels explained: SDE I, SDE II, SDE III, and Principal mapped to internal levels L4 to L8, with years of experience, pay, and Google and Meta equivalents. (1,606 words)
- [Designing Data-Intensive Applications (DDIA): What to Read and What to Skip](/content/blog/designing-data-intensive-applications-vs-grokking-system-design.html): DDIA is the standard book on how databases and distributed systems work. Here is what it covers, which parts pay off in a system design interview, what to skip, and what the second edition changed. (1,445 words)
- [Does Netflix Use an API? Microservices, Zuul, and Open Connect](/content/answers/detail/does-netflix-use-an-api/index.html): Yes. Netflix runs on APIs: REST between microservices, the Zuul gateway at the edge, device and partner integrations, and Open Connect for delivery. (1,247 words)
- [System Design Interview Guide 2026: Framework, Concepts & Questions | DesignGurus.io](/content/blog/complete-guide-sys-design/index.html): The complete system design interview guide for 2026. Learn the 4-step framework, 10 core technical concepts (caching, sharding, replication, queues), common question patterns, and what FAANG interviewers actually grade. Free, in-depth, updated for 2026. (11,523 words)
- [What tools does Netflix use?](/content/answers/detail/what-tools-does-netflix-use/index.html): What tools does Netflix use? (975 words)

## Resources

- [Full Page Index](/index.html): Browse all cached pages with rich metadata
- [About This Cache](/about.html): Methodology, technical details, and usage guidelines
- [XML Sitemap](/sitemap.xml): Machine-readable sitemap for crawler discovery
- [Robots.txt](/robots.txt): Crawler directives
- [AgentSite Network](https://agentsite.network/network.html): Public index of AgentSites and their machine-readable resources