I turn complex requirements into resilient, well-architected products — and obsess over the details that make them feel effortless.
Mengtong Un
Full-Stack Software Engineer
I'm a passionate Full-Stack Software Engineer with a proven track record of delivering high-quality, scalable web applications. My journey in software development has taken me across multiple countries and diverse technical challenges — from building AI-powered educational platforms to developing secure banking systems.
My approach to problem-solving combines technical expertise with a deep understanding of business requirements. I believe in writing clean, maintainable code and following best practices in software architecture. Whether working with microservices, implementing CI/CD pipelines, or designing user interfaces, I focus on creating solutions that are both robust and user-friendly.
Having worked in international teams across Japan, Cambodia, and Singapore, I bring a global perspective to software development. I'm particularly passionate about cloud technologies, system architecture, and creating seamless user experiences that make a real impact on businesses and their users.
Cloud Architecture
Scalable systems on GCP & AWS
Microservices & DDD
Domain-driven, event-driven design
CI/CD & DevOps
Docker, Kubernetes, Terraform
Full-Stack Delivery
From database to delightful UI
Education
Bachelor of Science in Software Engineering
Kirirom Institute of Technology · Nov 2019 – Oct 2023
Recognition
A mix of production systems and things I build to learn — each one a small story of a problem worth solving.
A modern, production-ready OAuth2 authorization server built with Next.js 15, React 19, TypeScript, Prisma, and PostgreSQL, implementing clean architecture principles with comprehensive security features and full OAuth2 specification compliance.
A full-featured expense management platform built with ASP.NET Core and C#, offering secure authentication, rich reporting dashboards, and automated recurring expense handling.
A responsive frontend web application for an expense management platform, built with React, TypeScript(Bun), and Tailwind CSS, featuring authentication, rich dashboards, and exportable reports.
A modern, high-performance portfolio website built with Next.js 15, React 19, TypeScript and Tailwind CSS to showcase professional experience and projects.
A simple calendar application designed to enhance productivity by allowing users to personalize their calendars with logos and names.
A technical test application designed to manage basic workforce allocation and employee data updates.
From low-level Go services to polished React front-ends and the cloud infra that runs them — here's where I spend my time.
Five years across Tokyo, Cambodia, and Singapore — building products in fintech, restaurant tech, HR systems, and more.
Develop and maintain web applications for restaurant ordering, payments, health food, and marketing campaigns using Python, Go, and modern cloud technologies.
Have a role, a project, or just want to say hi? My inbox is always open — I usually reply within a day.
