Sunhour Heng
Full-stack Developer
Hello, I'm Sunhour — a backend-focused developer with experience leading and building reliable, scalable systems. I specialize in API design, microservices, and system integrations that connect complex enterprise platforms. With over 2 years of experience, I enjoy solving backend challenges, improving performance, and delivering stable, production-ready solutions.
Work History
Application Developer
2024-06 – Current
Phnom Penh, Cambodia
- Lead the end-to-end development of the Smart–ABA Mini App, integrating multiple internal systems into a unified ecosystem with robust API orchestration
- Delivered three core user features — eSIM activation, data-pack management, and subscription renewal — along with purchase history and provisioning logs for full service transparency
- Architected microservices and designed a centralized portal for real-time transaction tracking and analytics
- Built a dynamic configuration system enabling feature toggling and A/B testing directly from backend to frontend clients
- Ensured data and workflow compatibility between legacy and new provisioning systems for seamless service continuity
- Implemented fault-tolerant pipelines with retry logic, idempotency, and recovery mechanisms for system reliability
- Collaborated cross-functionally with product, QA, and infrastructure teams to deliver continuously and maintain high system uptime
Core ISP Integration Features:
- Subscriber creation and synchronization with Core CBS
- Service activation, suspension, and termination automation
- Audit and monitoring module for transaction and provisioning logs
- Integration health and error recovery with self-healing job scheduler
Full Stack Web Developer
2022-02 - 2024-06
Beniten, AQUATION Building H, Sangkat Tonle Basac, Khan Chamkarmon, Phnom Penh, Cambodia
- Developed efficient and maintainable software according to business objectives and needs of clients.
- Maintained complex technology infrastructure and collaborated with product team to implement new features.
- Developed functional databases, applications and servers to support websites on back-end.
- Used React.js, Vue.js, SQL, Git, Bootstrap, Tailwind, Laravel to develop app-solutions.
Backend Developer Intern
2021-10 - 2022-02
Beniten, AQUATION Building H, Sangkat Tonle Basac, Khan Chamkarmon, Phnom Penh, Cambodia
- Adapted and understood Agile and Scrum methodologies.
- Cooperated with front-end developers and other team members to design more cohesive and functional code.
- Designed, developed and tested software applications.
- Developed server-side logic in Laravel.
Education
Bachelor Degree of Technology: Software Engineering With Multimedia
2017-08 - 2021-08
Limkokwing University - 79 Kampuchea Krom Blvd (128), Phnom Penh
High School Diploma
2011-02 - 2017-02
Sovannaphumi-School - Takhmau, Kandāl