Dmitrii Sergeev Email & Phone Number

Belgrade, Serbia

• 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.

Saint Petersburg Metropolitan Area

• 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.

Togliatty, Samara Region, Russian Federation

• 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.

Togliatty, Samara Region, Russian Federation

• 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.