Beginner24h estimated

    System Design Fundamentals

    Master the building blocks of scalable systems, from horizontal scaling to distributed caches, load balancers to message queues. Real trade-offs, not textbook theory.

    4 modules15 lessonsAshwani Garg

    Build strong intuition for system design through foundational lessons on the internet, scalability, databases, and caching. This course is designed to feel like a guided path rather than a disconnected list of articles.

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    Curriculum

    Module 1

    System Design Foundations

    How the internet actually works, the client-server model, databases, and APIs. The building blocks every architect needs before anything else.

    5 lessons · ~113 min
    1

    How The Internet Works

    article

    Understand the journey from browser request to bytes on screen.

    ~28 min

    2

    Client Server Architecture

    article

    Learn the request-response mental model that underpins modern products.

    ~18 min

    3

    What Is A Database

    article

    See why persistent storage shapes product behavior and system constraints.

    ~20 min

    4

    Intro To APIs

    article

    Connect clients, servers, and data using contract-driven interfaces.

    ~26 min

    5

    DNS Deep Dive

    article

    Trace how names resolve into the infrastructure behind every request.

    ~27 min

    Module 2

    Scalability Basics

    Scaling from 100 to 10 crore users. Vertical vs horizontal scaling, load balancers, and the trade-offs behind every scaling decision.

    3 lessons · ~75 min
    1

    What Is Scalability

    article

    Separate raw performance from the ability to survive growth.

    ~25 min

    2

    Horizontal Vs Vertical

    article

    Compare scale-up and scale-out strategies through practical trade-offs.

    ~25 min

    3

    Load Balancing

    article

    Distribute traffic safely while protecting reliability and headroom.

    ~25 min

    Module 3

    Database Design

    Choosing the right database, indexing strategies, and the SQL vs NoSQL debate with real production examples from Indian startups.

    2 lessons · ~53 min
    1

    Choosing The Right Database

    article

    Match access patterns and business constraints to the right datastore.

    ~26 min

    2

    Indexing, SQL Vs NoSQL

    article

    Balance query power, scale, and data modeling trade-offs.

    ~27 min

    Module 4

    Caching & Performance

    From browser cache to Redis clusters and CDNs. Caching strategies that turn slow apps into fast ones, with real-world invalidation patterns.

    5 lessons · ~108 min
    1

    Browser & HTTP Caching

    article

    Use built-in web caching layers before reaching for infrastructure.

    ~22 min

    2

    Redis Fundamentals

    article

    Apply in-memory caching to reduce latency and database pressure.

    ~25 min

    3

    Cache Invalidation

    article

    Handle the hardest part of caching without shipping stale experiences.

    ~12 min

    4

    CDN Basics

    article

    Push content closer to users and protect origins from traffic spikes.

    ~25 min

    5

    Performance Debugging

    article

    Trace bottlenecks with metrics instead of intuition.

    ~28 min

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