SD

System Design Hub

Learn • Architect • Scale

Become a Principal Architect

A curated, expanding knowledge base of system design deep-dives. Explore architectural patterns, distributed systems, databases, scalability principles, observability, security, and domain‑specific systems—organized into learning tracks.

  • Structured Tracks: 10 categorized folders matching real architecture competency areas.
  • Hands‑On Visual Notes: Interactive HTML explorations—no PDFs, no fluff.
  • Incremental Mastery: Start with fundamentals, layer in distributed concepts & scale patterns.
10 Tracks
-- Notes
Interactive
Recent Updates

Each note is a self-contained interactive exploration—ideal for focused study sessions and interview prep. New material is added frequently (see Changelog).

Learning Tracks

Core competency areas—use these as a roadmap. Master breadth before depth: fundamentals → distributed foundations → scaling & optimization → specialization.

Suggested Pathways

Foundations First

Jumpstart a broad mental model before deep specialization.

  1. System Design Fundamentals
  2. Architectural Styles & Patterns
  3. Databases & Data Management
  4. Distributed Systems Concepts
Generalist Track

Scalability Engineer

Focus on performance, reliability & production excellence.

  1. Distributed Systems Concepts
  2. Scalability & Performance Engineering
  3. DevOps, SRE & Operations
  4. Observability & Tuning (RUM, Caching)
Reliability Track

Domain Specialist

Layer domain expertise atop solid architectural grounding.

  1. Core Fundamentals
  2. Data & Storage Internals
  3. Security & Compliance
  4. Advanced / Domain Systems
Specialist Track

All Notes

Filter by category or search. Files are physically organized into matching folders.