Muhammad I.

Struggling with a legacy PHP application or need a custom ERP/MIS system? I fix, modernize, and build PHP/MySQL systems. With 15+ years in Core PHP, I bring experience in PHP 5-to-8 migrations and enterprise platforms handling 2,000+ concurrent users. Smaller fixes, performance optimization, and code audits are welcome too. PROVEN WORK Pakistan State Oil (PSO) * Migrated four enterprise web applications from PHP 5 to PHP 8. * Upgraded PHP API backends supporting four mobile applications. * Continued with a six-month enhancement engagement after the migration project. College of Physicians and Surgeons Pakistan (CPSP), Higher Medical Education * Developed a nationwide online examination platform (2,000+ concurrent users, 150+ specialties). * Developed and enhanced an institutional MIS/ERP supporting 500+ employees. * Developed an online applications system supporting 30+ application types. WHAT I BUILD AND MODERNIZE * PHP 5.x / PHP 7.x to PHP 8 migration * Custom ERP, MIS and internal business systems * Admin panels with role-based access control (RBAC) * REST APIs and mobile application backends * MySQL database design and performance optimization SMALLER TASKS I'M HAPPY TO TAKE ON * Debugging and bug fixes, including PHP errors after server or PHP version upgrades * Third-party API and payment gateway integration * Slow pages and inefficient MySQL queries * Security fixes and code reviews of inherited applications * Small features, reports, and PDF/Excel exports HOW I WORK I use Git for version control and develop and test changes in a controlled environment before deployment. I avoid making untested changes directly on production systems and document my work so your team can maintain the code afterwards. Send me a short description of your system or problem, and I'll tell you what I'd investigate first.