I'm a Full-stack Developer who specializes in building secure, scalable web applications using TypeScript, React, NestJS, and PostgreSQL. With a strong background in both frontend and backend development, I enjoy translating complex workflows—especially in healthcare and enterprise systems—into intuitive, high-performing software solutions. Over the past few years, I’ve worked on projects ranging from clinical research platforms to data-driven manufacturing systems, combining technical depth with a focus on reliability and usability. My experience includes developing SaaS survey modules for hospitals, automating semiconductor data pipelines, and architecting RESTful APIs with modern frameworks. I’m passionate about clean architecture, maintainable code, and continuous improvement. What sets me apart is my ability to quickly understand domain-specific requirements—like clinical data workflows or enterprise-scale systems—and design solutions that are both technically robust and user-centered.

Nahyun Lee

I'm a Full-stack Developer who specializes in building secure, scalable web applications using TypeScript, React, NestJS, and PostgreSQL. With a strong background in both frontend and backend development, I enjoy translating complex workflows—especially in healthcare and enterprise systems—into intuitive, high-performing software solutions. Over the past few years, I’ve worked on projects ranging from clinical research platforms to data-driven manufacturing systems, combining technical depth with a focus on reliability and usability. My experience includes developing SaaS survey modules for hospitals, automating semiconductor data pipelines, and architecting RESTful APIs with modern frameworks. I’m passionate about clean architecture, maintainable code, and continuous improvement. What sets me apart is my ability to quickly understand domain-specific requirements—like clinical data workflows or enterprise-scale systems—and design solutions that are both technically robust and user-centered.

Available to hire

I’m a Full-stack Developer who specializes in building secure, scalable web applications using TypeScript, React, NestJS, and PostgreSQL.
With a strong background in both frontend and backend development, I enjoy translating complex workflows—especially in healthcare and enterprise systems—into intuitive, high-performing software solutions.

Over the past few years, I’ve worked on projects ranging from clinical research platforms to data-driven manufacturing systems, combining technical depth with a focus on reliability and usability.
My experience includes developing SaaS survey modules for hospitals, automating semiconductor data pipelines, and architecting RESTful APIs with modern frameworks. I’m passionate about clean architecture, maintainable code, and continuous improvement.

What sets me apart is my ability to quickly understand domain-specific requirements—like clinical data workflows or enterprise-scale systems—and design solutions that are both technically robust and user-centered.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
See more

Language

English
Fluent
Korean
Fluent
Javanese
Advanced

Work Experience

Full-stack Web Developer at Bundang Cha Hospital
July 29, 2025 - Present
• Led full-stack development of a clinical Survey Module on a SaaS platform, enabling physicians to collect research and patient data. • Designed and implemented backend and frontend features with secure, scalable architecture using TypeScript, React, NestJS, and PostgreSQL. • Optimized screen layout creation by 20% using Cursor, while handling detailed feature implementation manually for precision. • Conducted requirements analysis for complex clinical data workflows and translated them into functional web applications.
Backend Developer at Samsung SDS
July 31, 2024 - February 27, 2025
• Designed and developed 24/7 data pipelines for semiconductor manufacturing systems using Java and Apache NiFi, ensuring high reliability and scalability. • Processed and analyzed 5MB+ monthly log data, improving monitoring accuracy and system insights. • Wrote and maintained unit and integration tests, contributing to robust and maintainable backend systems. • Collaborated in code reviews and implemented the first internal NiFi pipeline, setting new engineering standards.
Full-stack Web Developer at Bundang Cha Hospital
February 28, 2023 - October 30, 2023
• Independently designed and built a clinical survey platform using TypeScript, React, NestJS, and PostgreSQL for patient intake and medical data collection. • Shortened time to collect and analyze survey results by 50% through implementation of an exporting data function. • Deployed and managed secure AWS EC2 servers, ensuring data confidentiality and accessibility. • Developed documentation and maintenance procedures, supporting continuous improvement and scalability.
Project Management Assistant at Samsung SDS
August 31, 2021 - December 30, 2021
• Supported Agile workflows using Jira and Confluence, improving team communication and project tracking. • Performed tests based on Samsung SDS management requirements and prepared reports via Confluence.
Full-stack Web Developer at Naviworks
September 1, 2019 - June 30, 2021
• Built and maintained seven integrated web systems using Java, Spring Framework, and JavaScript, improving internal operational efficiency. • Developed an integrated search system with Apache Solr, increasing accessibility of key data across systems. • Improved UI responsiveness and reduced SPA development time by 20% using eXBuilder6 (canvas-based UI).

Education

Bachelor of Computer Engineering at National Institute for Lifelong Education
January 1, 2018 - January 1, 2019
International Transportation and Customs Diploma, High Honour at Seneca College
January 1, 2014 - January 1, 2016

Qualifications

Network Administrator certificate
May 21, 2019 - May 20, 2024

Industry Experience

Manufacturing, Healthcare, Education, Government, Software & Internet, Professional Services