Software engineer for business systems

Developed and expanded core functionalities of an enterprise ERP system, implementing new modules and resolving complex technical bugs. Led the development of a multi-tenant HRMS covering 7 modules including attendance, payroll, and offboarding. Integrated ERP with ZATCA for automated e-invoicing compliance. Connected the Salla platform to synchronize products, categories, orders, and payment methods. Integrated ZKTeco biometric devices for real-time attendance tracking. Built JWT-secured RESTful APIs for mobile applications. Implemented automated WhatsApp notifications for accounting workflows. Customized Oracle APEX interfaces using Theme Roller and JavaScript.

Prepared client environments by validating hardware compatibility, installing required Windows operating systems, and setting up Oracle databases for stable operations. Installed, configured, and integrated Oracle databases with the accounting system, ensuring reliable and efficient production use. Managed secure data import/export operations and disaster recovery from backups to protect data integrity. Configured LAN and Internet connectivity to link client terminal machines with the central database server for multi-user accounting access.

Architected and developed an accounting system from scratch, including database structures and complex financial functions aligned with business requirements. Developed and optimized backend architecture using C#, LINQ, and SOLID principles while maintaining data integrity and security in Oracle 19C. Integrated user interfaces with the core database, enforced security controls, and improved system performance and financial workflows. Built various reports for the accounting system using Crystal Reports.

Developed Oracle APEX applications from analysis and database design through UI implementation and deployment. Built backend business logic using advanced SQL and PL/SQL for operational and financial workflows. Created customized secure authentication systems and integrated external RESTful APIs.

Delivered end-to-end software solutions for clients, covering requirements analysis, system design, database modeling, backend development, deployment, and support. Developed ERP, accounting, mission management, volunteer management, medical lab, and exchange management systems with secure workflows and practical reporting. Built business applications and SaaS solutions using ASP.NET Core, Oracle APEX, PL/SQL, C#, Python, JavaScript, and relational databases. Implemented AI and automation solutions using Python, NLP, computer vision, OpenCV, and deep learning for document analysis, face recognition, and remote sensing. Integrated RESTful APIs, authentication flows, notifications, and third-party services to connect business systems and automate manual operations.