nielsvermeiren12/wordpress-backend-developer-handbook

This repository holds a large reference handbook aimed at developers who work with WordPress on the back end. The stated scope is over 4,800 pages of material covering what someone would need to know to reach a senior level in WordPress backend development. There is no source code included, just documentation content. The collection includes more than 800 questions framed as senior-level interview preparation. Having this many questions in one place can help someone rehearse answers across a wide range of technical topics before a job interview, or identify gaps in their knowledge. The author also notes the handbook is well-suited for use with Google NotebookLM, which is a tool from Google that lets you upload documents and then ask an AI questions about them. Loading a large reference like this into NotebookLM would allow someone to study more interactively. The handbook is currently focused on backend development. In the WordPress context, that covers the server-side layer: the PHP-based core that powers WordPress, database interactions, plugin architecture, custom post types, hooks and filters, REST API integrations, and performance and security considerations. The author mentions plans to expand coverage to full-stack development in the future, which would add frontend topics such as Gutenberg block development and JavaScript. Because the README is brief and no table of contents is visible in the repository description, it is not possible to verify the exact topics covered. Based on what is stated, this appears to be a self-assembled reference guide rather than an official WordPress or community resource.