Hi, I’m Changmo Jung (Jack Jung), a backend-focused full-stack software engineer based in Vancouver, BC. Over the past 5+ years I’ve built scalable web platforms using Java (Spring Boot), Node.js (Express), and React/React Native. I design robust APIs, manage relational and NoSQL databases, and deploy cloud-native applications on AWS with Docker and CI/CD pipelines. I thrive on end-to-end ownership across projects, from architecture to production. In my recent roles at Itoxi, RS Interactive, and Chain Labs IT I’ve led backend development, designed infrastructure, and contributed to frontend work, consistently delivering reliable services and performant features. I’m passionate about solving complex engineering problems and continuously learning new technologies to drive product success.

Changmo Jung

Hi, I’m Changmo Jung (Jack Jung), a backend-focused full-stack software engineer based in Vancouver, BC. Over the past 5+ years I’ve built scalable web platforms using Java (Spring Boot), Node.js (Express), and React/React Native. I design robust APIs, manage relational and NoSQL databases, and deploy cloud-native applications on AWS with Docker and CI/CD pipelines. I thrive on end-to-end ownership across projects, from architecture to production. In my recent roles at Itoxi, RS Interactive, and Chain Labs IT I’ve led backend development, designed infrastructure, and contributed to frontend work, consistently delivering reliable services and performant features. I’m passionate about solving complex engineering problems and continuously learning new technologies to drive product success.

Available to hire

Hi, I’m Changmo Jung (Jack Jung), a backend-focused full-stack software engineer based in Vancouver, BC. Over the past 5+ years I’ve built scalable web platforms using Java (Spring Boot), Node.js (Express), and React/React Native. I design robust APIs, manage relational and NoSQL databases, and deploy cloud-native applications on AWS with Docker and CI/CD pipelines. I thrive on end-to-end ownership across projects, from architecture to production.

In my recent roles at Itoxi, RS Interactive, and Chain Labs IT I’ve led backend development, designed infrastructure, and contributed to frontend work, consistently delivering reliable services and performant features. I’m passionate about solving complex engineering problems and continuously learning new technologies to drive product success.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Work Experience

Full-Stack Developer at Itoxi
October 1, 2023 - December 1, 2025
At Itoxi, I provided 100% backend ownership across multiple projects, designing and implementing APIs, infrastructure, and database schemas using Java (Spring Boot) and contributing to frontend work with React. Projects included Petnuri Pet Platform and Inflinker Global, where I built scalable backend services and designed data models, while maintaining significant frontend collaboration (80% contribution). I also worked on LionsCrew with Node.js (Express.js) and TypeScript, delivering API design, infrastructure, and frontend features with React.
Back-End Developer at RS Interactive
August 1, 2022 - August 1, 2023
Developed backend services using Node.js (Express.js) and TypeScript, deploying containerized services on AWS (ECS, ECR) with Docker, Nginx, and Cloudflare. Built CI/CD pipelines for automated deployment and maintained 100% backend ownership. Worked on CONAZ Remicon Platform, designing backend architecture, APIs, and infrastructure, deploying services on Naver Cloud Platform using Docker and Nginx.
Full-Stack Developer at Chain Labs IT
March 1, 2022 - July 1, 2022
Led backend development for NIP-NFT Web (Node.js/Express.js, API design for auction systems) and contributed to frontend development with React (70% frontend contribution). Also implemented NFT transaction features for AK Friends NFT Web with React.
Front-End Developer at The Build Soft
June 1, 2021 - January 1, 2022
Delivered user-facing features for GongSero Client Web using React (60% frontend contribution) and developed Zero Waste App as a React Native mobile application (100% frontend contribution).

Education

Bachelor of Science in Robotics Engineering at University of Hoseo
January 11, 2030 - February 21, 2026

Qualifications

Information Processing Engineer – Korean National IT Certification
January 11, 2030 - February 21, 2026

Industry Experience

Software & Internet, Professional Services