Master Coding Skills &
System Design.

Learn tsvector, tsquery, GIN indexes, ranking, and multi-language search.

Learn caching strategies — cache-aside, write-through, TTL, eviction policies, and Redis vs Memcached.

Learn aggregate functions, GROUP BY to group results, and HAVING to filter groups.

Build a REST API with JWT auth, validation, and proper HTTP responses.

Learn CSS fundamentals — selectors, specificity, the box model (margin, border, padding, content), display types, and the cascade.

Write meaningful commit messages, use conventional commits, and amend commits.

Learn PHP functions — parameters, return values, default parameters, and variable scope.

Learn how to create, insert, remove, and modify HTML elements using jQuery — append, prepend, before, after, remove, clone, and wrap.

Learn touch, cp, mv, rm, mkdir — file and directory manipulation.