• Optimized a React DeFi application for transaction analysis and blockchain network performance, resulting in a threefold increase in transaction display speed and graph generation.• Developed and launched a Web3 application ecosystem on React, elevated the overall user experience with blockchain network.

• Created micro-frontends with React, Node.js, TypeScript for e-sign document platform, elevating customer engagement by 17%, enhancing client-bank interaction, and saving 200+ tons paper/year• Covered application with Jest for unit tests and Cypress for end-to-end testing, cutting time-to-market by 40% and boosting release stability• Refactored the codebase and assets, resulting in the application loading and displaying content significantly faster, reducing load times from 6.7 seconds to just 1.2 seconds.

• Conducted refactoring of React Native application and integrated the JavaScript Engine Hermes, resulting in a 1.9x increase in application responsiveness and speed.• Enhanced an open-source PDF viewer by integrating SVG drawing, allowing the company to replace costly proprietary tools, saving $28,000 annually.

• Constructed a custom micro-frontend system on Vue.js 2 and WebSockets for a food tech company, resulting in annual savings of over $80,000 on proprietary solutions.• Created an MVP application using React Native and Node.js to manage home energy systems, leading to project investments and a successful release to market.• Integrated functionality on React and TypeScript with automotive components, enabling the manufacturer to effectively handle all insurance cases.

• Implemented a queue order processing system in JavaScript and PHP, resulting in improved production workflow organization, a 52% increase in processed orders, and a significant reduction in order backlog.