PHP + MYSQL

Backend and web application development with PHP & MySQL: Full cycle of server-side development — from clean architecture to database integration. Includes designing normalized MySQL/PostgreSQL database schemas, writing complex and optimized SQL queries (indexes, transactions, EXPLAIN profiling). Development of reliable REST/JSON APIs, integration of payment systems (Stripe, PayPal, local gateways), authorization systems (JWT, OAuth2, sessions). Work with both modern clean PHP 8.x (OOP, MVC, PSR standards) and frameworks Laravel / Symfony. The output is clean, secure (protection against SQL injections, XSS, CSRF) and documented code with ready-made migrations.