Project: Collaborative Whiteboard (Miro-like). DAU ~15k. - Led the frontend development of an interactive whiteboard, ensuring seamless functionality across devices. - Integrated AI into an interactive whiteboard application to generate diagrams from text input, allowing users to create flowcharts and system architectures more efficiently and with reduced manual effort. - Achieved significant performance improvements 200–500% by optimizing rendering, and processing approaches. - Reduced communication errors to zero and increased release frequency by 30% through the implementation of API code generation based on frontend-backend contracts. - Delivered the MVP within 6 months, achieving an overall service rating of 4.6/5 through frequent releases informed by business needs and user feedback. - Collaborated with the video calling service team to integrate the whiteboard as a micro frontend, enabling real-time collaboration during calls. - Mentored Junior and Middle developers, enhancing code quality and boosting team productivity. Technologies: TypeScript, JavaScript, React, Next.js, RxJs, MobX, Jest, Pixi.Js, WebGL, Canvas API, Webpack, Selenium

Outsource Company Specializing in Fintech Web Applications - Designed and developed a high-load decentralized exchange (DEX) with scalable React/Next.js frontend, integrated with Ethers.js, real-time order book via WebSockets, wallet connectivity. - Developed a high-performance bond analytics platform with interactive 2D visualizations, enabling real-time multi-bond comparisons. Optimized rendering to cut load times and boost engagement. - Built a financial analysis web app tracking stocks and cryptocurrencies, integrating live market data with social sentiment charts, improving decision-making accuracy through real-time insights. - Authored and audited Solidity smart contracts (ERC-20, ERC-721/1155 for NFTs, staking, liquidity pools) using Truffle, Hardhat, and Ethers.js, focusing on gas optimization and security best practices. - Automated subscription management for Telegram groups by developing a C# service, fully eliminating manual processes and improving operational efficiency. Technologies: TypeScript, JavaScript, React, Next.js, GraphQL, Webpack, Jest, Node.js, TailwindCSS, Styled components, C#, .NET, Solidity, Hardhat, Web3, Docker, CI/CD, Telegram Bot API, Sentry