Elen Ong

I’m a .NET developer focused on building and enhancing Web APIs and portals for banking, human resource, and risk management projects. I enjoy turning business needs into clean, reliable backend features—especially around payment flows, transactions, and system integrations.

In my current role (PT Global Sentra Teknologi), I work on building API for a Merchant Application to support order/payment flow and to make it easier to view transaction records. I also enhance API for EDC Terminal Management and upgrade an EDC Terminal portal so users can access terminal data and transaction history. A key responsibility is updating Web API from .Net Framework 4.8 to .Net Core 6.0, improving performance and maintainability.

Previously, I built a Pipeline Risk Management website for Pertamina Hulu using C# with ASP MVC and a Repository Design Pattern, and I handled front-end implementation with Telerik Kendo, jQuery, Bootstrap, and cshtml. At PT Kairos Utama, I enhanced a CRM/Billing-style experience and extended Microsoft Dynamics 365-related tools, including work with Blazor.

I’ve also delivered backend solutions across HR and e-commerce contexts—building an HR Management System leave & permission module with C# ASP MVC at PT Indomarco Prismatama, and creating notifications using a C# Console Application with Microsoft Task Scheduler. Earlier PHP experience includes building e-commerce web backends using the CodeIgniter framework and Web API development, and I continue to bring this “API-first” mindset to every project I touch.