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Hi, I’m Derek Jung, a full-stack developer with 3+ years of experience building and shipping end-to-end products using React, Angular, Node.js, Python, and JavaScript. I enjoy turning ideas into scalable software and delivering real value through thoughtful architecture and rapid iteration. I’ve led projects like GemLog.dev, a Chrome extension SaaS, and built scalable solutions for healthcare, fleet management, and restaurant POS systems that cut costs and ensure regulatory compliance. I thrive in API design, prototyping, and data-driven iteration to drive measurable outcomes.…Hi, I’m Derek Jung, a full-stack developer with 3+ years of experience building and shipping end-to-end products using React, Angular, Node.js, Python, and JavaScript. I enjoy turning ideas into scalable software and delivering real value through thoughtful architecture and rapid iteration. I’ve led projects like GemLog.dev, a Chrome extension SaaS, and built scalable solutions for healthcare, fleet management, and restaurant POS systems that cut costs and ensure regulatory compliance. I thrive in API design, prototyping, and data-driven iteration to drive measurable outcomes.

Derek Jung

Full Stack Developer, Web Developer, Front-End Developer, +2

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Hi, I’m Derek Jung, a full-stack developer with 3+ years of experience building and shipping end-to-end products using React, Angular, Node.js, Python, and JavaScript. I enjoy turning ideas into scalable software and delivering real value through thoughtful architecture and rapid iteration. I’ve led projects like GemLog.dev, a Chrome extension SaaS, and built scalable solutions for healthcare, fleet management, and restaurant POS systems that cut costs and ensure regulatory compliance. I thrive in API design, prototyping, and data-driven iteration to drive measurable outcomes.…Hi, I’m Derek Jung, a full-stack developer with 3+ years of experience building and shipping end-to-end products using React, Angular, Node.js, Python, and JavaScript. I enjoy turning ideas into scalable software and delivering real value through thoughtful architecture and rapid iteration. I’ve led projects like GemLog.dev, a Chrome extension SaaS, and built scalable solutions for healthcare, fleet management, and restaurant POS systems that cut costs and ensure regulatory compliance. I thrive in API design, prototyping, and data-driven iteration to drive measurable outcomes.

Available to hire

Hi, I’m Derek Jung, a full-stack developer with 3+ years of experience building and shipping end-to-end products using React, Angular, Node.js, Python, and JavaScript. I enjoy turning ideas into scalable software and delivering real value through thoughtful architecture and rapid iteration.

I’ve led projects like GemLog.dev, a Chrome extension SaaS, and built scalable solutions for healthcare, fleet management, and restaurant POS systems that cut costs and ensure regulatory compliance. I thrive in API design, prototyping, and data-driven iteration to drive measurable outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Work Experience

Independent Full-Stack Developer at GemLog (Side Project)

October 1, 2025 - Present

GemLog is a Chrome extension and web platform that helps developers capture, organize, and recall code solutions using AI-powered knowledge management. Built end-to-end from user research to deployment in 4 weeks; conducted 15+ user Reddit interviews; created a feedback loop with in-app bug reporting, feature requests, and analytics; achieved 40% feature adoption within 2 weeks of launch; designed a template-based journaling system; implemented data-driven iteration with 3 pivots.

Full-Stack Developer at Independent / Freelance

May 1, 2024 - Present

Building scalable web solutions for startups and SMBs across e-commerce, hospitality, SaaS, and real estate domains. Notable project: OrderNow.au.

Full-Stack Developer (Generative AI) at Team Sparta Inc.

July 1, 2024 - Present

Refined POS kiosk ordering system with Angular architecture optimization; stabilized RxJS reactive streams and reduced order processing errors by 35% through improved state management. Engineered Tyro payment gateway and automated in-app invoice generation system to improve transaction reliability and user experience.

Full-Stack Developer at Mosafe

March 1, 2023 - April 1, 2024

Developed backend systems and frontend features for a fleet management platform serving Australian Post and Startrack with 3,500+ daily users. Designed scalable Serverless architecture using AWS Lambda & S3, reducing storage costs by 40%. Built a drag-and-drop card builder for driver safety training modules. Ensured data integrity for 1000+ concurrent transactions using MongoDB multi-document ACID transactions. Established CI/CD pipelines and implemented RBAC with workspace-level permissions; created automated card expiry system processing 3500+ cards daily.

Full-Stack Developer at LeapIn!

July 1, 2020 - July 1, 2021

Contributed to participant portal development enabling NDIS participants to track funding and book services; built reusable React components for data visualization dashboards; supported WCAG 2.1 accessibility standards; collaborated with UX to implement inclusive interfaces and participated in design reviews and user testing.