An extensive collection of diagrams, code samples, and step-by-step walkthroughs for classic interview questions (e.g., designing Pastebin or Twitter).
Reading a system design PDF passively will not help you during a live interview. Grab a digital whiteboard tool (like Excalidraw or Miro) and recreate the architectural diagrams by hand.
This is arguably the most popular repository on GitHub for system design. It offers a structured roadmap, covering everything from core concepts (load balancing, caching) to real-world interview scenarios.
Best for point-to-point task distribution, decoupling services, and worker pools.
Don't do it.
I can provide a highly detailed, step-by-step breakdown tailored exactly to your upcoming interview. Share public link
The system design interview is often the most intimidating part of the tech hiring process. Unlike coding rounds with definitive right or wrong answers, system design questions are open-ended, ambiguous, and scale-dependent. Engineers frequently search for the ultimate shortcut, leading to the highly popular search query:
GitHub is a goldmine for free, community-driven system design guides. Instead of buying expensive courses, you can build a world-class preparation curriculum using these open-source repositories:
Load balancers distribute incoming network traffic across multiple servers to prevent any single server from becoming a bottleneck. You should know the difference between Layer 4 (transport layer) and Layer 7 (application layer) load balancing, as well as algorithms like Round Robin and Consistent Hashing. Databases: SQL vs. NoSQL Hacking The System Design Interview Pdf Github
The book focuses on a "building block" approach, teaching candidates how to assemble complex architectures from standard components.
: Analyzes architectural choices such as microservices vs. monoliths and orchestration vs. choreography. Connection to GitHub
What is the Daily Active User (DAU) count? Estimate Queries Per Second (QPS) and storage requirements for 5 years. Step 2: High-Level Design (10–15 Minutes) Draw a bird's-eye view of the system. Identify the entry points (mobile/web clients). Place API gateways and load balancers.
Now you have a custom that is worth more than any generic GitHub download . An extensive collection of diagrams, code samples, and
Know when to apply LRU (Least Recently Used), LFU (Least Frequently Used), or FIFO.
To succeed, you must move beyond high-level buzzwords and understand how to apply these concepts in a 45-minute interview: Horizontal vs. Vertical Scaling.
Focuses specifically on how to structure your answers in the interview setting, highlighting the trade-offs needed to impress interviewers. Learning to articulate design choices. Link: System Design Interview Best PDFs and E-books to "Hack" the Interview
To "hack" the interview, you need a repeatable framework. You cannot just jump straight into drawing boxes. The most popular GitHub repositories generally recommend a four-step approach: 1. Feature Scoping & Constraints (First 5 Minutes) This is arguably the most popular repository on
Redis for active feeds, Fan-out workers, Push/Pull hybrid models. (Drive, Dropbox) Chunking files, Syncing metadata