Cache Right, Scale Far: Redis, CDN, and Edge
Caching is one of the highest-leverage skills in backend engineering. A well-placed cache cuts database load, slashes response times, and keeps services running when traffic spikes. This track covers the full spectrum: in-memory stores with Redis, global content delivery through CDNs, and low-latency computation at the edge — the three layers that underpin nearly every high-traffic system in production today.
What You Will Learn
You will start with the mechanics of caching — why caches work, where they break, and the eviction policies (LRU, LFU, TTL) that govern them. From there you will configure Redis as a high-performance cache, model CDN behaviour for static and dynamic content, and push logic to serverless edge functions. Later courses cover multi-layer cache architecture, cache invalidation strategies, distributed caching patterns with Redis Cluster and Redis Sentinel, CDN security (signed URLs, WAF integration), and monitoring cache hit rates and latency in production.
The Learning Path
Twelve courses run from A1 through C2. The free first course establishes the fundamentals; subsequent courses build in controlled steps through B1 and B2 — where you design multi-layer architectures and handle advanced cache management — before reaching the C1 and C2 level capstones: Advanced Redis for Distributed Caching, Advanced CDN Optimization & Security, Real-World Caching Architectures & Case Studies, and finally Designing Resilient & Secure Caching Systems.
How It Works
Each course is split into short, focused lessons you complete in the built-in code editor with real-time feedback. When a concept is not clicking, an AI tutor is available in-lesson to explain the reasoning without just handing you the answer.
