Concepts & Notes
Concise, original reference notes covering core Computer Science fundamentals, System Design, and framework internals. Built as a living knowledge base for quick revision and deep technical clarity.
Global Secondary Indexes
Hot Partitions
Choosing a Database
Three Database Stacks That Cover Most Systems
Anatomy of an HTTP Request
API Design Basics
REST vs GraphQL vs gRPC
Caching Strategies and Invalidation
Generating Unique IDs and Short Codes
Idempotency, Retries and Backoff
System Design Principles and Tenets
Consistency in Distributed Databases
Transactions and ACID in Databases
Design Patterns Worth Memorizing
SOLID Principles
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