As a full-stack developer, you're not just building applications – you're crafting experiences. Usability testing is vital to ensure your application meets user needs and expectations, involving observing real users, identifying pain points, and gathering feedback to inform design and development decisions.
Guide for full stack developers on optimizing performance with caching: application-level (e.g., Redis/Memcached) to store hot data, database caching (query and row-level) to speed complex reads, and CDN caching for static assets at the edge. Covers best practices (targeted caches, TTLs, invalidation, monitoring) and a FashionFusion case study showing major latency cuts, faster pages, and higher conversions.
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