Fradejas, Jonathan M.

OutSystems Lead Developer and certified O11/ODC professional with 4+ years of software development experience, including 3+ years delivering enterprise low-code applications. Leads solutions from requirements clarification and solution design through development, testing, deployment, production support, and user training. Experienced in workflow automation, reusable components, dashboards, notifications, SQL, REST APIs, security controls, performance troubleshooting, and integration with C#/.NET services.

Combines

OutSystems expertise with hands-on experience in enterprise billing, ERPNext, and Microsoft Dynamics 365 Business Central integrations.

Software Developer - C#/.NET at Frontier Towers Associates Philippines (2025-01 – Present)

• Maintain and enhance enterprise Customer Billing and Ground Lease applications for FTAP, FTSI (formerly CREI Philippines), and ATC (Transcend Towers).
• Implement billing rules covering proration, escalation, discounts, effectivity dates, invoice grouping, monthly billing breakdowns, recurring invoice runs, and validation.
• Develop REST API and JSON integrations between ERPNext and Microsoft Dynamics 365 Business Central; support invoice generation, submission, troubleshooting, and high-volume processing.
• Investigate production defects, improve error handling and performance, deploy.NET applications to IIS, and coordinate technical resolution with business and IT stakeholders.
• Developed a GeneXus Java CMMP web application with GAM integration, Jira workflow consumption, Tomcat deployment, Android Studio, and Figma-based UI design.
• Supervise an intern and provide React.js training for the Customer Billing user interface.

OutSystems Developer / Lead Developer at Sycip Gorres Velayo & Co. (SGV & Co.) (2023-01 – 2025-03)

• Led and developed OutSystems applications for accreditation, leave management, CRM and inventory, asset tracking, and employee probation workflows.
• Translated business requirements into maintainable modules, reusable components, dashboards, notifications, reports, validations, roles, and approval workflows.
• Handled requirements clarification, development, testing, user training, deployment support, production fixes, performance improvements, and stakeholder coordination.

Full Stack Developer / Software Engineer at Leepe Outsourcing Corporation (2022-04 – 2023-01)

• Developed and maintained an RFID and ESD Access Monitoring system using C#/.NET, SQL Server, and Swagger, covering backend logic, APIs, database operations, user-facing features, testing, debugging, and production support.
• Maintained eMaintenance modules using VB.NET and SQL Server, including application logic, database interactions, testing, and defect resolution.

Bachelor of Science in Information Technology – Polytechnic University of the Philippines (2018 – 2022)