Hi, I'm Kongsun.
Software engineer
Passionate about building scalable and maintainable systems.
Open to new opportunities · Melbourne or remote
Skills
Backend
JavaSpring BootPostgreSQLMySQLNode.jsNestJSREST APIsSOAP
Frontend
React.jsNext.jsTailwind CSS
Mobile
React NativeFlutter
Other
GitLab CI/CDGitScrum Master
Experience
PiPay
Back-end Developer · Fintech & Payment Systems
2022 – 2025 +
- Integrated Bakong (Cambodia's national payment infrastructure) and Alipay remittance, enabling cross-border transfers.
- Migrated legacy projects to a GitLab tag-based CI/CD pipeline, reducing deployment risk and release cycle time.
- Integrated partner systems via SOAP and RESTful APIs across the payment ecosystem.
- Led sprint planning and mentored junior developers as Scrum Master.
VTECH CO., LTD
Full-Stack Engineer · Scrum Master
2021 – 2022 +
- Built admin panels and game UI with Next.js, Ant Design, and Tailwind CSS.
- Managed end-to-end deployment pipelines for backend, frontend, and mobile.
- Contributed full-stack features across the product — client-facing and server-side.
- Led sprint planning and backlog grooming as Scrum Master.
Viettel Cambodia
Software Developer · Java Back-end
2020 – 2021 +
- Developed payment APIs using Java, Spring Boot, DropWizard, and Oracle.
- Primary technical contact for partners — documentation, onboarding, and support.
- Translated local market requirements into specs, collaborating with Vietnam-based developers.
Bi-Kay
Mobile App Developer · React Native & Flutter
2019 – 2020 +
- Built a delivery app in React Native and Flutter.
- Developed ~50% of Bebeep, a booking and traffic communication app.