BeaverWorks is a store management platform that provides comprehensive services for order, delivery, and store management through a mobile app. As a senior React Native developer, I focused on enhancing the stability of existing products, designing components based on a design system, and improving the build system.• Optimized React Native build system using iOS and Android native build schemas, increasing efficiency by 30% for production builds of over 3 apps.• Enhanced error handling efficiency by 50% through implementing API error parsing and React Error Boundary.

Bookband is a platform that enables users to purchase and share books through an offline bookstore-based system. As a Founding Engineer, I was responsible for system design and the implementation of the mobile service using React Native. I successfully led the launch of the platform and ensured the stable operation of complex services both online and offline.• Led the development and successful launch of a P2P book sharing app with both online and offline functionality using React Native on iOS and Android.• Automated workflows for React Native apps using CodePush and GitHub Actions, reducing deployment time by 40% and increasing reliability.• Utilized efficient data fetching and schema validation using the Relay client for GraphQL-based data colocation.• Created a PWA with React, cutting kiosk costs by 30% and reducing deployment efforts by 50%• Integrated public and private APIs through background processes to transform and store over 8,000 book records to meet operational needs• Improved the deployment process of Nest.js applications using AWS Lambda, reducing deployment time by over 50% and costs by 70%• Linked MySQL databases on AWS RDS using TypeORM for efficient data management

Caredoc is a senior care platform in Korea that provides caregiver matching and various other services. As a React Native developer, I integrated fragmented structures across mobile products, increased code maintenance efficiency, and led the migration to a new design system.• Adopted a monorepo structure to React Native projects using Lerna, achieving approximately 30% code sharing and creating an efficient work environment.• Led the project to migrate to a new design system in collaboration with designers, establishing code conventions for consistency and maintainability.

Dooboolab is a company oriented towards open-source projects. As a Frontend Developer, I contributed to various related projects. Specifically, I researched and applied methods to integrate the Relay GraphQL client into Expo projects. Additionally, I significantly contributed to analyzing new domains and planning them into products.• Partnered with stakeholders to analyze the domain and develop a React web app for inventory management.• Created a boilerplate for integrating the Relay within Expo, increasing developer onboarding speed by 50%.

Kchain is a blockchain consulting firm where I performed various blockchain-related tasks as a developer. Specifically, I built cloud-based network nodes to meet the qualifications of a Block Producer for the EOS blockchain network, successfully registering as a BP. Additionally, I developed multiple Dapps in both web and mobile versions, supporting the team in overcoming various business challenges.• Set up and operated EOS Blockchain network nodes in a cloud environment, acting as a Block Producer• Developed a web3 web-kit for EOS account management using React and Django• Led the overall development an airdrop mobile app, achieving 30+ partnerships and 1,700+ users within 2 months

MCST is a company that provides system improvement and integration services. As a Java Developer, I have experience working on multiple projects integrating public institution websites based in Seoul. In addition to website development, I have experience in database and CRM migration tasks.• Constructed the frontend for websites of 11 institutions using HTML, jQuery, and CSS.• Engineered the backend and performed DB migration using Java Spring framework and Oracle DB to integrate the systems of multiple sites.