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I am a dedicated full-stack web developer with over 4 years of experience delivering scalable, high-performance enterprise systems for major clients such as SK Hynix and Samsung. I excel at building robust front-end and back-end solutions, leveraging modern frameworks and languages to drive reliability and user experience. I am fluent in JavaScript, TypeScript, and Java, with expertise across React, Vue, Next.js, and Spring Boot. I thrive in cross-functional teams, enjoy writing clean, maintainable code, and am passionate about driving technical innovation and scalable software solutions.…I am a dedicated full-stack web developer with over 4 years of experience delivering scalable, high-performance enterprise systems for major clients such as SK Hynix and Samsung. I excel at building robust front-end and back-end solutions, leveraging modern frameworks and languages to drive reliability and user experience. I am fluent in JavaScript, TypeScript, and Java, with expertise across React, Vue, Next.js, and Spring Boot. I thrive in cross-functional teams, enjoy writing clean, maintainable code, and am passionate about driving technical innovation and scalable software solutions.

Hyeontaek Oh

Web Developer, Front-End Developer, Back-End Developer, +2

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I am a dedicated full-stack web developer with over 4 years of experience delivering scalable, high-performance enterprise systems for major clients such as SK Hynix and Samsung. I excel at building robust front-end and back-end solutions, leveraging modern frameworks and languages to drive reliability and user experience. I am fluent in JavaScript, TypeScript, and Java, with expertise across React, Vue, Next.js, and Spring Boot. I thrive in cross-functional teams, enjoy writing clean, maintainable code, and am passionate about driving technical innovation and scalable software solutions.…I am a dedicated full-stack web developer with over 4 years of experience delivering scalable, high-performance enterprise systems for major clients such as SK Hynix and Samsung. I excel at building robust front-end and back-end solutions, leveraging modern frameworks and languages to drive reliability and user experience. I am fluent in JavaScript, TypeScript, and Java, with expertise across React, Vue, Next.js, and Spring Boot. I thrive in cross-functional teams, enjoy writing clean, maintainable code, and am passionate about driving technical innovation and scalable software solutions.

Available to hire

I am a dedicated full-stack web developer with over 4 years of experience delivering scalable, high-performance enterprise systems for major clients such as SK Hynix and Samsung. I excel at building robust front-end and back-end solutions, leveraging modern frameworks and languages to drive reliability and user experience.
I am fluent in JavaScript, TypeScript, and Java, with expertise across React, Vue, Next.js, and Spring Boot. I thrive in cross-functional teams, enjoy writing clean, maintainable code, and am passionate about driving technical innovation and scalable software solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Web Developer at Shiftone

June 1, 2025 - September 8, 2025

Migrated a Windows-based image processing application from C# to Java, enabling cloud-based deployment and improving platform independence and scalability. Built and deployed admin services using Next.js (SSR) with TypeScript, integrated authentication with Keycloak, and introduced unit testing (Vitest), improving reliability and maintainability. Developed internal systems using React, Redux, and React Query; implemented real-time notifications with Socket.IO, enhancing communication efficiency across teams.

Web Developer at Crewmate

April 1, 2022 - September 8, 2025

Korea-based flight ticket sales website. Maintained and optimized the flight ticket sales platform using jQuery, Java, Oracle, ensuring system stability and minimizing downtime. Migrated applications from Spring Framework to Spring Boot, reducing deployment complexity and improving application performance.

Web Developer at Shiftone

June 1, 2025 - September 8, 2025

Led a Windows-based image processing Java migration from C# to Java, enabling cloud-based deployment and improving platform independence and scalability. Built and deployed admin services for Samsung Electronics’ Co-Living Platform using Next.js (SSR) with TypeScript, integrated authentication with Keycloak, and introduced unit testing (Vitest), improving reliability and maintainability. Enhanced SK Hynix HCP (Hynix Cloud Platform) by developing internal systems using React, Redux, and React Query; implemented real-time notifications with Socket.IO to improve cross-team communication.

Web Developer at Crewmate

April 1, 2022 - September 8, 2025

Maintained and optimized a Korea-based flight ticket sales platform using jQuery, Java, and Oracle to ensure system stability and minimize downtime. Migrated applications from Spring Framework to Spring Boot, reducing deployment complexity and improving performance.