Jiseong Oh

QA & Frontend Developer

Passionate SaaS developer with 3+ years of experience building and publishing modern web applications. Specialized in React, Node.js, and cloud technologies.

Skills

ReactTypeScriptNode.jsPythonVPSMongoDBNext.jsTailwind CSS

Contact

Work Experience

My professional journey and contributions

QA & Frontend Lead

Metaba Co Ltd

March 2024 - Present

Lead QA and frontend development for an fullstack AI company, managing technical teams and ensuring platform reliability for thousands of active users.

•Managed 5 developers, successfully supporting +3.5k monthly visitors of created online space.
•Performed regular QA checks to ensure service stability, data integrity, and UX consistency.
•Co-hosted creator campaigns with multiple MCNs, achieving total of 236k+ SNS impressions.

ReactNext.jsTailwind CSSTypeScriptVPSMongoDB

Computer Emergency Response Team (CERT)

Republic of Korea Navy

August 2022 - March 2024

Managed cybersecurity infrastructure and network operations for a large-scale military environment. Led network administration, security automation, and regular quality assurance tests.

•Administered firewalls, NAC servers, and Cisco network devices supporting 70,000+ personnel.
•Conducted QA and reliability testing for mission-critical intranet pages, ensuring >95% uptime.
•Developed internal scripts for automation for patching security across key systems.

JavaScriptPythonMySQLJavaScriptNetwork Access Control (NAC)Jupyter Notebook

Frontend Developer - Volunteer

Join Us Korea (NGO)

July 2022

Developed responsive user interfaces and implemented modern web standards. Worked closely with designers to create seamless user experiences.

•Delivered full redesign of the organization’s public blog site, increasing retention by 18%.
•Executed QA testing across content updates and tracked SEO performance.
•Maintained AdSense integration and DevOps on a platform with 15k MAU and 1M+ total visitors.

JavaScriptHTMLCSSTistory