High‑Level Design Learning Roadmap
Master High‑Level Design (HLD) step by step. This comprehensive roadmap covers system architecture, scalability patterns, and distributed systems design used by top tech companies.
- Structured progression: Each stage builds from foundational networking and storage concepts to advanced scaling, observability, and production readiness.
- Interview ready: Lessons map directly to common questions like design a global cache, realtime chat, or multi-region architecture.
- Linked resources: Every module links to companion case studies and deep dives so you can move from theory to applied practice.
What You'll Learn
How to work through this roadmap
- Skim each module overview to understand the core objective and success criteria.
- Complete the linked reading material and diagrams, then summarise the trade-offs in your own words.
- Validate your understanding by applying the concept in a relevant case study or the interview prep guide.
Pro tip: Reserve a weekly reflection block to note gaps, then use the search page to quickly revisit prerequisite topics.
Your Learning Progress
Introduction
0/2Core Concepts
0/5System Components
0/3Data Storage
0/3Communication
0/1Architecture Patterns
0/2Stage overview
Stage 1 • Orientation
Focus: Understand what system design interviews evaluate, key terminology, and the architecture mindset.
Categories: Introduction
Practice: Skim case study summaries to see the end state you are working toward.
Stage 2 • Core Concepts
Focus: Master latency fundamentals, scalability principles, and how core services (compute, storage, network) fit together.
Categories: Core Concepts, System Components
Practice: Draw high-level diagrams for URL shortener and chat systems without worrying about scale.
Stage 3 • Data Mastery
Focus: Compare SQL/NoSQL trade-offs, replication, sharding, and consistency guarantees.
Categories: Data Storage
Practice: Walk through capacity sizing for read-heavy vs write-heavy workloads using the estimation worksheet.
Stage 4 • Communication Patterns
Focus: Decide when to use synchronous vs asynchronous protocols, queues, streams, and pub/sub messaging.
Categories: Communication
Practice: Implement publish/subscribe flows on a whiteboard for notification and analytics pipelines.
Stage 5 • Architecture Patterns
Focus: Apply microservices vs monolith reasoning, CQRS, event sourcing, and multi-region deployment tactics.
Categories: Architecture Patterns
Practice: Combine multiple patterns in a full case study, then document risks and mitigation strategies.
Introduction
Core Concepts
Scalability
BeginnerUnderstanding horizontal and vertical scaling strategies.
Reliability
BeginnerBuilding systems that continue to work correctly during failures.
Availability
BeginnerEnsuring systems remain operational and accessible.
Consistency
IntermediateUnderstanding data consistency models in distributed systems.
CAP Theorem
IntermediateUnderstanding the fundamental trade-offs in distributed systems.
System Components
Data Storage
Communication
Architecture Patterns
Ready to Master System Design?
This roadmap represents years of industry experience distilled into a structured learning path. Each topic includes real-world examples, architectural diagrams, and practical insights from engineers at top tech companies. Start with the fundamentals and progressively build expertise in distributed systems, scalability, and system architecture.