SEUNGYEON JI
Vancouver,BC
Summary
Code driven by logic; Design inspired by user insight. I am a Full Stack Developer leveraging a unique background: a Master’s degree that honed my ability to logically dissect complex scenarios, and a decade of leadership as a Chef that taught me to deeply understand customer desires and collaborate effectively. I offer a rare combination of analytical precision and user-centric intuition to build impactful software.
Overview
1
1
year of professional experience
1
1
Certification
Work History
Full Stack Developer Intern
Sugogo Technologies Ltd
Vancouver, BC
03.2025 - 12.2025
- Improved maintainability: Reduced repetitive try-catch blocks by implementing a global error handling wrapper (catchAsync), enhancing code consistency and minimizing boilerplate across all controller functions.
- Enhanced efficiency (DRY principle): Designed and implemented a Factory Handler (getAll, getOne, updateOne) to standardize repetitive API logic, reducing controller code by approximately 25% and accelerating feature development.
- Increased extensibility: Built a middleware-based registration system to dynamically validate required request fields by route configuration, making the backend more scalable and easier to maintain during API expansion.
- Improved UX & state management: Integrated Zustand with React Query to separate client-side and server-side states, leveraging onMutate for optimistic updates to minimize data reflection delay and provide a smoother user experience.
- Boosted performance: Resolved performance bottlenecks in React Native parcel list rendering by strategically applying useMemo and useCallback, significantly reducing unnecessary re-renders and improving UI responsiveness.
Education
Master of Arts - Politics And International Studies (PAIS)
University of Warwick
United Kingdom09-2020
Skills
- Frontend - JavaScript (ES6), TypeScript, React, Redux, Redux-Saga, Nextjs, Gatsby, GraphQL, CSS, SASS, Tailwind CSS, Bootstrap, Pug,
- Backend - Nodejs, Expressjs, MongoDB, Mongoose, MySQL, PostgreSQL, Sequelize
- Tools & DevOps - Jest, ESLint, GitHub, Docker, AWS
Accomplishments
- Server-Side Optimization & Cost Reduction: Enhanced page load speed by implementing Next.js server-side rendering, improving SEO and user experience. Reduced server costs by utilizing AWS Lambda for on-demand image processing and enabling server activation only when needed via API Gateway.
- State Management & Real-Time Features: Used Redux and Redux-Saga for state management and real-time updates, ensuring consistent data flow and user experience.
- Secure & Scalable System Design: Designed a database schema with Sequelize to optimize query performance and implemented secure user authentication using Passport, HTTPS, and Nginx.
- Secure and Scalable RESTful APIs: Developed user authentication, tour management, and booking APIs using Node.js and Express.js. Enhanced security with token-based authentication and optimized response times by addressing bottlenecks in query execution.
- Efficient NoSQL Database Design: Designed a flexible database schema with MongoDB and Mongoose to improve query performance and storage efficiency, resolving issues with slow data retrieval during high-traffic scenarios.
- SEO-Friendly Design: Adopted the MVC design pattern to structure the backend, enabling clean separation of concerns. Used server-side rendering with Pug to reduce initial load times and improve search engine visibility.
- High Lighthouse Scores: Achieved 100% Lighthouse scores in performance, SEO, and accessibility by implementing advanced optimization techniques.
- Dynamic Content Management: Enabled easy blog updates by integrating Markdown and GraphQL, eliminating the need for additional coding.
- Efficient Deployment: Deployed the site on Netlify with continuous integration, ensuring automated updates and fast content delivery globally.
1. Node Birds - Oct 2023 - Present
- https://start.portfolio-simon.com/start
2. Natours - Mar 2024 - Jun 2024
- https://simon-project-2-76fa3de4b732.herokuapp.com/
3. Gatsby.js Personal Blog (Personal Project) -Jul 2023 - Sep 2023
https://dony-world.netlify.app/
Certification
- AWS Certified Solutions Architect – Associate (Issued Aug 2024, Expires Aug 2027)
- MongoDB Node.js Developer Path (Issued Aug 2024)
- AWS Certified Cloud Practitioner (Issued Jun 2024, Expires Jun 2027)
Timeline
Full Stack Developer Intern
Sugogo Technologies Ltd
03.2025 - 12.2025
Master of Arts - Politics And International Studies (PAIS)
University of Warwick