About

Hen Heang — Backend-focused Software Engineer

I'm Hen Heang, a Cambodian software engineer currently working in South Korea. I specialize in Java, Spring Boot, MyBatis and PostgreSQL, with frontend experience using Next.js and TypeScript.

My professional work focuses on enterprise systems, API development and database-driven applications. I also build practical products in real estate, personal finance and AI-assisted learning.

I care about maintainable architecture, clear business logic and software that solves real problems.

Location: Seoul, South Korea
Experience: 2+ years
Email: henheang15@gmail.com
Languages: Khmer
English
Korean
Availability: Open to opportunities

Career Timeline

Experience, education & milestones

One chronological journey through schools, training programs, companies, awards, and certifications—from Cambodia to Korea. Credentials appear under the institution that awarded them.

2020-2024
Computer Science
Royal University of Phnom Penh · Phnom Penh, Cambodia
Pursuing a Bachelor's degree in Computer Science with a focus on software development and web technologies. And learning about Project management
- Bachelor of Science in Computer Science and Engineeringgraduation
2021
Basic C++ Programming
ANT Technology Training Center
Introduction to programming concepts using C++.
2021
Word, Excel, PowerPoint & Internet Certificate
Addbook Computer Centre
Completed Addbook Computer Centre's practical computer course covering Microsoft Word, Excel, PowerPoint, and internet fundamentals from September to December 2021.
2023
Full-Stack Development Bootcamp
Korea Software HRD Center
Intensive training in full-stack development, covering HTML, CSS, JavaScript, React, Java, and database management.
- Advanced Achievement Awardgraduation
- Advanced Achievement Awardaward
- KSHRD Basic Course Certificatecertificate
- KSHRD Advanced Course Certificatecertificate
2023
Mobile Application Development
Korea Software HRD Center
Training in mobile application development using Java and Android Studio.
January 2024 — October 2025
Software Engineer
KOSIGN [Korea Software Innovation Global Network] · Phnom Penh, Cambodia
Built B2B billing and commerce systems from PostgreSQL schema design through secured Spring Boot APIs and supporting web interfaces.
- Built B2B billing and payment features for enterprise clients
- Designed PostgreSQL schemas and optimized SQL queries
- Implemented Spring Boot APIs secured with Spring Security and JWT
- Java 8+
- Spring Boot
- Spring Security
- PostgreSQL
- MyBatis
- Next.js
- TypeScript
- Mindfulness for Wellbeing — Certificate of Completioncertificate
October 2025 — Present
Full-Stack Developer
Bizplay · Seoul, South Korea
Building enterprise financial applications for government and corporate clients in a Korean development environment, across Java services, Oracle data, and production web interfaces.
- Building Java and MyBatis services backed by Oracle
- Developing and maintaining enterprise web interfaces with JavaScript and jQuery
- Improving production stability with a cross-functional Korean team
- Java
- MyBatis
- SQL
- JavaScript
- jQuery
- HTML/CSS
- REST APIs
2026
Claude 101
Anthropic
Completed Anthropic's foundational course on working with Claude, covering core concepts of prompting, context, and getting reliable results from AI models in everyday workflows.
2026
Claude Code 101
Anthropic
Completed Anthropic's hands-on course on Claude Code, learning to use an agentic coding assistant for real development tasks such as debugging, refactoring, and building features directly in the terminal — skills applied throughout this portfolio's development.
2026
Java (Basic) Certificate
HackerRank
Passed HackerRank's Java (Basic) skill certification test, validating core knowledge of Java syntax, OOP fundamentals, and problem-solving with the language.
2026
Claude Code in Action
Anthropic
Completed Anthropic's course on applying Claude Code to real, hands-on development workflows, building on the foundational Claude Code 101 course.
2026
AI Foundations
OpenAI Academy
Completed OpenAI Academy's AI Foundations course, covering foundational concepts of working with AI models.
In progress
Deepening Java, Spring Framework Skills & Data Structures and Algorithms
Self-Learning
Continuously improving Java and Spring Framework skills, focusing on data structures and algorithms for better problem-solving.