Roadmaps
Tech & Software30 DaysBeginner

System Design Fundamentals: A 30-Day Beginner Roadmap

A structured 30-day curriculum for beginners to master fundamental web architecture, distributed systems concepts, and real-world system design interview patterns.

Curated by@peteriishakverified
  1. Phase 1

    Foundations of Web Architecture & Networking

    Days 1-4

    Understand core networking principles and basic client-server communication models.

    Learn

    • Client-Server Architecture Basics
    • HTTP/HTTPS Protocols and RESTful API Fundamentals
    • DNS (Domain Name System) Lookup Process
    • TCP vs UDP and Network Layer Protocols

    Practice & build

    • Trace a complete HTTP request-response flow in browser developer tools
    • Draw a basic architecture diagram showing DNS resolution and server connection
    • Compare payload sizes and latency between REST and basic TCP sockets

    Milestone

    Ability to explain every step of what happens when a user types a URL into a web browser.

  2. Phase 2

    Traffic Management & Caching Strategies

    Days 5-9

    Learn how to distribute load across servers and optimize data access speeds using caches.

    Learn

    • Load Balancers (Layer 4 vs Layer 7, Round Robin, Least Connections)
    • API Gateways and Reverse Proxies
    • In-Memory Caching (Redis/Memcached) and Caching Patterns
    • Cache Eviction Policies (LRU, LFU) and Cache Invalidation

    Practice & build

    • Diagram a load balancer setup distributing traffic to multiple backend instances
    • Implement a simple LRU cache in code to understand eviction mechanics
    • Identify caching points (client, CDN, application, DB) for a read-heavy app

    Milestone

    Design a high-availability entry layer utilizing load balancers and a multi-level caching layer.

  3. Phase 3

    Data Persistence & Scaling Databases

    Days 10-14

    Master SQL vs NoSQL selection criteria and database scaling patterns.

    Learn

    • Relational (SQL) vs Non-Relational (NoSQL) Use Cases
    • Database Replication (Leader-Follower, Multi-Leader)
    • Database Sharding, Partitioning, and Partition Keys
    • CAP Theorem, ACID vs BASE Properties

    Practice & build

    • Evaluate database choices for a social network vs an e-commerce platform
    • Design a database sharding scheme using consistent hashing
    • Diagram master-slave replication and model failover scenarios

    Milestone

    Select and justify appropriate database technologies based on CAP theorem requirements.

  4. Phase 4

    Asynchronous Systems & Messaging Queues

    Days 15-18

    Understand decoupled architectures, background job processing, and message brokers.

    Learn

    • Synchronous vs Asynchronous Communication
    • Message Queues (RabbitMQ, SQS) vs Event Streaming (Kafka)
    • Publish-Subscribe (Pub/Sub) Pattern
    • Handling Message Ordering and Idempotency

    Practice & build

    • Architect an email notification service powered by an asynchronous message queue
    • Write pseudo-code for an idempotent API endpoint using request keys
    • Map out message retry loops and Dead Letter Queue (DLQ) flows

    Milestone

    Architect a resilient, decoupled background task system designed for traffic spikes.

  5. Phase 5

    Mid-Way Review & Catch-Up

    Days 19-21
    Buffer phase — time to catch up

    Review core foundational concepts, fill knowledge gaps, and solidify trade-off understanding.

    Learn

    • Comprehensive Review of Networking, Load Balancing, DBs, and Messaging
    • Trade-off Analysis Frameworks (Latency vs Throughput, Consistency vs Availability)

    Practice & build

    • Revisit and complete any unfinished activities from Phases 1-4
    • Combine prior phase diagrams into one cohesive end-to-end system diagram
    • Conduct a self-quiz on system design terminology and core trade-offs

    Milestone

    Successfully complete a comprehensive mid-course knowledge check without referring to notes.

  6. Phase 6

    Capacity Estimation, CDNs & Rate Limiting

    Days 22-26

    Learn back-of-the-envelope estimation skills and protective edge architecture.

    Learn

    • Back-of-the-Envelope Estimation (QPS, Bandwidth, Storage, RAM)
    • Rate Limiting Algorithms (Token Bucket, Leaky Bucket, Sliding Window)
    • Content Delivery Networks (CDN) and Edge Servers
    • System Monitoring, Alerting, and Circuit Breakers

    Practice & build

    • Calculate QPS, storage, and bandwidth requirements for a photo-sharing app
    • Design a rate limiter module to prevent API abuse
    • Specify CDN configuration for static media vs dynamic content

    Milestone

    Perform rapid capacity calculations and design protection layers for a scalable service.

  7. Phase 7

    End-to-End Case Studies & Blueprint Design

    Days 27-30

    Synthesize all concepts into structured end-to-end system design case studies.

    Learn

    • 4-Step System Design Framework (Scope, Scale, High-Level, Deep Dive)
    • Case Study 1: Designing a URL Shortener (TinyURL)
    • Case Study 2: Designing a Social Media News Feed (Twitter/Facebook)
    • Identifying Single Points of Failure (SPOF) and Bottlenecks

    Practice & build

    • Create a complete end-to-end architecture blueprint for a URL Shortener
    • Compare Push vs Pull models for news feed generation
    • Conduct a mock system design walkthrough explaining trade-offs

    Milestone

    Produce a production-ready system architecture blueprint for a complex real-world application.

Want one built around you?

Turn any learning goal into a clear, actionable plan in seconds.

Create your roadmap