Skip to main content

Full-Stack Developer - February 2026 - April 2026

OpenPay

OpenPay (SaaS Project) | Remote - Phnom Penh

Built and maintained an Open Banking platform including integrations, KHQR payment mocking, a developer portal, and webhook relay workflows.

OpenPay developer portal preview with API docs and transaction tools.

Role Overview

Built and maintained an Open Banking platform including integrations, KHQR payment mocking, a developer portal, and webhook relay workflows.

Key Contributions

  • Developed responsive Next.js interfaces for API documentation, checkout integration testing, and developer dashboards.
  • Engineered Java Spring Boot services with RBAC, standardized transaction workflows, and banking security protocols.
  • Implemented real-time simulation using NestJS mock APIs and a custom Node.js Bakong relay service for webhook testing.
  • Strengthened security through robust JWT design, secure reverse proxy configuration, and quality gates with Checkstyle and PMD.
  • Improved deployment reliability using Dockerized API, mock API, web UI, and Nginx services with CI/CD automation.

Tools Used

  • Java (Spring Boot)
  • Next.js
  • NestJS
  • Node.js
  • Docker
  • Nginx
  • OpenAPI/Swagger
  • KHQR
  • JWT
  • Git
  • GitHub

Next project

Explore all projects