Siyoon Lee
shunrises@gmail.com
Product-minded software engineer with a hands-on, adaptive approach and 2+ years of industry experience. Led the of a K-POP goods trade mobile service project that reached 30,000 users in 6 months. Experienced in full-cycle development, user-centric design, and social media marketing. Passionate about building impactful products from 0 to 1.
Work Experience
Hongik University
Seoul, South Korea
Dept. of Computer Engineering
Feb 2020 - now
4th Grade Student(Senior)
KUKKA
Remote
Freelance Flutter Engineer
Nov 2023 - Dec 2023
Resolved payment issues in a Flutter WebView based app, enhancing service stability.
Bridged communication gaps with clients to derive practical solutions.
Identified issues in Firebase push notifications due to backend payload formats and proposed format improvements.
Team Milestone
Seoul, South Korea
Co-Founder & Software Engineer
Sep 2022 - May 2023
Developed MVPs for early-stage startups.
Collaborated with clients from the idea stage to extract core features and materialize them into feasible development.
Build MVP services using Flutter and Ruby on Rails
Sharenine: Implemented infinite scroll and caching features for UX improvement
Mealer: Applied state management and shown daily diet food list with lazy loading for performance optimization
Petner
Seoul, South Korea
Intern -> Full Time Software Engineer
Jan 2021 - Jun 2022
Planned and developed a Map-Based petsitter matching feature during the intership.
Built a real-time pet care video streaming system using Agroa SDK and AWS S3.
For using minimum development resources, Planned and developed a Flutter Web MBTI test marketing web app and deployed it on Firebase.
Installed PostHog to analyze user funnel from ad exposure to app install, engagement, and sign-up, improving conversion rates
Korea Food waste Processing Equipment Cooperative
Remote
Software Engineer
Jun 2024 - Mar 2025
Led a phased rebuild of a WordPress-based site to reduce operational risk with a focus on stability and cost efficiency
Executed initial launch on Gnuboard6 with DB migration on AWS Lightsail; identified data integrity issues post-deployment
Migrated to v0 + Next.js + Supabase architecture, achieving a zero operating cost model
Introduced granular admin features for non-developers to enable operational self-sufficiency
Stack: Next.js, Supabase, TypeScript, AWS Lightsail
Education
Hongik University
Seoul, South Korea
Dept. of Computer Engineering
Mar 2020 - now
4th Grade Student(Senior)
Skills
Programming Languages
Dart, Ruby, JavaScript, TypeScript
Frameworks
Flutter, Ruby on Rails, Next.js
Tools
Firebase, AWS, PostHog, Git, GitHub, Notion, Figma, Supabase
Awards
GDSC Solution Challenge 2023 Global Top 100
GDSC
The app aids memory stimulation and recall training through quizzes and family photos uploaded by caregivers
Jan 2023
Open Source
Posthog Flutter SDK
Posthog
Error resolution for function argument name changes in the Javascript SDK loaded when using SDK in Flutter Web
May 2021 - May 2021
Projects
K-POP Idol Preference Grid Image Generater
Personal Project
Product Planning, Development, Marketing
Aug 2022 - now
Developed and operated a web application for generating K-POP idol preference grids.
Set up dynamic Open Graph data with Next.js for optimized external sharing previews.
Added features based on user feedback, including collaborative creation with friends and custom questions with photo attachments.
Choi-Ae(Bias) Market
Internal Side Project
Product Planning, Development, Marketing
Jul 2021 - Jan 2022
Conceived and developed a K-POP merchandise resale mobile platform from scratch
Achieved 30,000 users within 6 months through Twitter-based marketing strategies and retweet events
Website Color Adjustment Chrome Extension
Personal Project
Product Planning, Development
Feb 2024 - Feb 2024
Developed to reduce eye strain caused by the bright blue and yellow UI colors after the school official website renewal
Initially created for personal use but later distributed as a Chrome extension with over 200 likes and 300 saves on the university's online community
Ducktility (K-POP Idol Preference Grid Image Generator)
Personal Project
Built and operated a preference-grid image generator for K-POP fandom users (operating since 2022)
Achieved 4.63M impressions, 650K engagements, and 140K link clicks on X within 10 days of feature launch
Designed AI agent–assisted workflows to eliminate solo development bottlenecks
Optimized architecture post-traffic surge to reduce operating costs
Stack: Next.js, Supabase, TypeScript
Public URL: ducktility.studio
FabricMart Detail Page Generator
Personal Project
Developed a utility to streamline repetitive tasks in fabric e-commerce product detail page creation, improving content production productivity
Stack: Flutter Web
Website
GitHub
GitHub (old account)




