Firoz Mahmud

Senior Oracle APEX Developer

Data Tech Solution • Full time

Jan 2018 - Present • 8 yrs 4 mos

I am a Senior Oracle APEX Developer with strong experience in designing and developing secure, scalable, and high-performance web applications using Oracle APEX, Oracle SQL, and PL/SQL. I specialize in transforming complex business processes into efficient database-driven systems. I have successfully developed several business management solutions for different industries, focusing on automation, data accuracy, and user-friendly interfaces. Key Achievements • Diagnostic Center Management System (SaaS) – Developed a complete system including patient registration, doctor appointments, diagnostic test management, billing, and reporting. • Point of Sale (POS) System – Built a full POS application with product catalog, customer management, sales processing, receipt generation, and reporting dashboards. • Inventory & Pharmacy Management System – Implemented modules for purchase, sales, stock tracking, suppliers, expiry monitoring, and automated reports. • Resource Reservation System – Designed booking workflows, approval processes, notifications, and management dashboards. • ERP Invoice Portal Integration – Developed an Oracle APEX portal integrated with ERP systems via Oracle Integration Cloud (OIC) for invoice consultation and download. • Advanced Database Development – Designed normalized Oracle database schemas with constraints, indexes, triggers, and performance optimization. • Real-Time Data Integration – Implemented WebSocket with Node.js to enable real-time updates in Oracle APEX applications without page refresh. Technical Skills Oracle APEX | Oracle SQL | PL/SQL | REST APIs | JavaScript | HTML | CSS | Database Design | Performance Optimization | Business Process Automation I focus on delivering reliable, scalable, and efficient applications that help businesses streamline operations and improve productivity.