wtf is backend-from-first-principle?

This repository is a personal study collection covering backend software development from foundational concepts up to production-level topics. The README describes it as a set of notes, code snippets, and explanations organized into 24 topic areas, written to break complex subjects down into understandable pieces. The topics move roughly from basic to advanced. Early sections cover how web requests work, how a server routes incoming requests to the right handler, how data gets converted between formats, and how authentication and user permissions are managed. Middle sections address layered code architecture, REST API design principles, databases, caching, background job queues, and full-text search. Later sections cover more production-oriented concerns: error handling, service-to-service communication, configuration management, logging, and safely stopping a running server without losing in-progress work. The final sections deal with scaling, concurrency, containers and deployment pipelines, automated testing, event streaming with message brokers, and real-time communication over persistent connections. The code examples in the repository appear to be written in Go based on the detected language. The repository is framed as a personal reference, meaning it reflects one developer's learning process rather than a finished library or framework. The README welcomes corrections and contributions through issues or pull requests. There is no description of a specific application to install or run, the value is in the documented explanations and working code samples across the topic directories.