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System Design for Web Developers
Intermediate
system-design
architecture
scalability
backend
About this course
A practical system design course for experienced web developers (mid-level+). You already ship features; this course teaches you to reason about what happens when your app meets real traffic: scaling, load balancing, caching, database replication and sharding, consistency trade-offs, message queues, API styles, service decomposition, CDNs, and production reliability. The capstone walks through a full interview-style design of a URL shortener, from capacity estimation to failure modes.
Every lesson pairs theory with concrete numbers, code-level examples, architecture diagrams, a checklist, and a self-check quiz.
Lessons (11)
1
System Design Fundamentals: Scaling, Latency, Estimation
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2
Load Balancing
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3
Caching
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4
Databases at Scale: Indexes, Replication, Sharding
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5
Consistency, CAP, and Idempotency
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6
Message Queues and Asynchronous Processing
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7
API Design: Styles, Versioning, Pagination, Rate Limiting
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8
Monolith vs Microservices
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9
CDN, Static Content, and Object Storage
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10
Reliability Patterns and Observability
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11
Capstone: Designing a URL Shortener End to End
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