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Most scaling articles explain the difference between horizontal and vertical scaling. Very few explain which one startups should actually choose. The answer has less to do with servers and more to do with engineering time, operational complexity, and business survival.
Learn how database indexes really work, why they speed up queries, when they slow systems down, and the production mistakes most developers discover too late.
Learn how to diagnose and fix slow APIs in production. Discover the real causes of latency, database bottlenecks, caching strategies, N+1 queries, payload optimisation, observability, and scaling tradeoffs
Learn what Redis actually does in backend systems, how it works, real-world Redis use cases, and when you should use Redis instead of a traditional database.
