FABRILL | Secondhand High-End Jewelry Commerce Platform

• As an early-stage team member and lead developer, I drove the entire process from stack selection to full-stack development, deployment, service launch, and operation, achieving 25,000 MAU.

• Optimized development and operational efficiency by selecting a cost-effective stack, keeping monthly operational costs under $150.

• Contributed to the Supabase open-source project to enable KakaoTalk login, enhancing compatibility and driving an 80% increase in new user sign-ups.

• Built an AI-based product recommendation system using OpenAI text-embedding-3-small model, increasing click-through rate from 5% to 36.8%.

• Reduced page load time by 1.5 seconds through the implementation of Streaming SSR, leading to lower user drop-off rates.

• Developed the order and payment systems, including a coupon system, and added split-payment functionality, which increased order volume by 30% by expanding user payment options.

• Enhanced the UX of the product registration form by implementing auto-fill features based on available data, leading to a 50% increase in product registrations and a 100% reduction in user inquiries.

• Improved form validation and reduced code complexity by developing forms using React Hook Form and Zod.

• Wrote form components test to reduce the bug occurrence rate.

• Strengthened data-driven decision-making with A/B testing via Growthbook, establishing a framework to validate product improvements.

• Built a design system using Storybook and shadcn-ui, creating an environment for easy component development and visualization.

• Developed and managed a WebView app, including store submissions, universal links, and CodePush integration, and ensured seamless interaction between web and app features (e.g., image viewer, permissions).

• Automated Slack Bot notifications for transactions, revenue, and product registrations, enhancing operational efficiency.

• Collaborated with the marketing department to facilitate GTM setup using data attributes, providing necessary implementation and guidance to support the marketing team in effective data tracking.

Farmmorning | Agricultural Community Services

• Developed a farming journal and ledger service to assist with easy logging of farming activities and records.

• Modularized existing code and implemented a home page redesign.

• Developed a direct marketplace for the sale of agricultural products and machinery.

• Utilized React Native for WebView usage and integration with external SDKs.

• Built WebView apps and handled store deployment, including writing guidelines.

• Rewrote the WebView app using React Native, developing a native app.

• Developed type-safe using ReScript.

Farmmy | Global Agricultural Community Services

• Developed React Native for using app features in WebView.

• Improved WebView navigation for UX.

• Managed testers and deployed apps using AppCenter.

• Created guidelines for setting up the local app environment and documented structural flowcharts using GitHub Wiki.

rescript-bindings | Open Source, external library bindings for ReScript

• Configured a monorepo setup.

• Implemented automatic npm deployment using GitHub Actions.

• Developed a API using Hyperledger Aries for a decentralized identity verification project leveraging blockchain (Hyperledger Indy).

• Developed a viewer interface for cargo inspection and AI-based item identification to be used by inspectors at Incheon Logistics Center, Incheon Port, and Pyeongtaek Port.

• Enhanced developer experience (DX) by developing a simulator to mimic the system flow and operation of the closed network environment, facilitating the development of software for installation in such environments.

• Developed a VBA macro to automatically populate vulnerability assessment reports (MS Excel) with the results generated from running inspection tools, significantly reducing the time required for report generation.

• Assisted in conducting web vulnerability assessments by referencing the guidelines provided in the Major Information and Communication Infrastructure Vulnerability Assessment Guide.