Backend & databases: PostgreSQL, MySQL, SQLite, MongoDB, Redis, API design, data modeling


Backend & databases: PostgreSQL, MySQL, SQLite, MongoDB, Redis, API design, data modeling
Web development: React, Nextjs, Nodejs, HTML/CSS, REST APIs, GraphQL, authentication, responsive UI
Programming: Python, JavaScript/TypeScript, Java, C/C, C#, Go, Rust, PHP, Ruby, SQL, Bash
Software engineering: architecture, design patterns, debugging, refactoring, testing, code review, performance optimization
Security: secure coding, authentication/authorization, vulnerability analysis, application security fundamentals
Developer tooling: Git, package managers, build systems, linters, testing frameworks, IDE/editor workflows