Dev Builds URL Shortener to Learn Backend Basics: Databases, Redis, and HTTP

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A developer learning backend fundamentals built a URL shortener as a starter project, finding it an effective way to explore core concepts in a manageable scope. The project involved generating unique short codes using nanoid, storing URL pairs in a database, and handling HTTP 302 redirects to route users from short links to original URLs. To prevent abuse, Redis was integrated as a rate limiter, using fast in-memory counters tied to each alias with automatic expiry windows. Collision handling was addressed through a retry loop that regenerates a new code if a duplicate alias is found in the database. The full source code has been shared publicly on GitHub as a reference for other developers tackling similar beginner backend projects.

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