Leonid Kuznetsov, Software Engineer
| Kyiv, UA
SUMMARY
I am a software engineer with over 10 years of experience in developing web applications/browser extensions/mobile apps/SSR/SSE/Hybrid Apps and a passion for frontend development, creating high-performance and user-friendly applications. My experience in UI/UX design and architecture has enabled me to work on diverse projects, including video streaming, crypto development, video chats, autopilot systems, text analysis, and machine learning. I hold a Master’s degree in Computer Science and have excellent collaboration and communication skills. I excel at identifying and solving problems, debugging, creating accessible and reusable UIs, and constantly seek opportunities to improve software products to make them simple and efficient for users.
EDUCATION
Tavria State Agrotechnological University 2010-01-01 — 2016-01-01
Master’s - Computer Science, GPA: 4.0
SKILLS
Software Engineer (Senior): JavaScript, TypeScript, React, Redux, Mobx, Webpack
EXPERIENCE
Writer | Senior Frontend Engineer
https://writer.com

Development of Chrome Extension and AI Studio

  • Development of a Chrome Extension for text analysis
  • Creation of AI Studio for building AI-based applications using LLM models and integrating them into company apps
  • Workflow optimization, user experience improvement, and efficiency enhancement
  • Collaboration to strengthen frontend architecture
  • Development of algorithms to detect and fix code issues
Writer | Senior Frontend Engineer
https://writer.com

Development of Chrome Extension and AI Studio

  • Development of a Chrome Extension for text analysis
  • Creation of AI Studio for building AI-based applications using LLM models and integrating them into company apps
  • Workflow optimization, user experience improvement, and efficiency enhancement
  • Collaboration to strengthen frontend architecture
  • Development of algorithms to detect and fix code issues
Zenseact | Senior Frontend Developer
https://zenseact.com

Developed a visual dashboard for testing Level 4 autopilot for Volvo cars. This autopilot is implemented in all new models of the 2023–2024 lineup and planned for 2025–2027.

  • Created user interfaces to display autopilot testing data
  • Integrated with backend systems for real-time data visualization
  • Optimized interface performance
  • Collaborated closely with autopilot testing and development teams
  • JavaScript, TypeScript, React, Redux, Material UI, D3.js, WebGL
OneArt | Full Stack Web3 Developer
https://oneart.digital

As a Full Stack Web3 Developer, my main responsibility was developing decentralized applications and smart contracts on the Ethereum blockchain using TypeScript and Solidity. I worked with Remix, Hardhat, and Ethers.js for smart contract development and Next.js for building web applications. Additionally, I developed various extensions for web3 wallets, NFT marketplaces, DAO communities, and exchange tools.

  • TypeScript, Solidity, Remix, Hardhat, Ethers.js, Next.js
  • Development of decentralized apps and smart contracts on Ethereum
  • Created extensions for web3 wallets, NFT marketplaces, DAO communities, and exchange tools
  • Collaborated with the team to successfully launch innovative decentralized products and services
Vungle | Software Engineer
https://vungle.com

Worked on creating ads inside mobile games. This project provided a convenient and fast way to create all types of ads (Preroll/Overlay/Midroll/AfterPauseRoll, etc.) with extensive interaction with a machine learning analytics system.

  • TypeScript, React, Redux, Redux-Thunk, Reselect, Material UI, Material-Table, StyledComponents, Jest, Enzyme, WebdriverIO, NodeJS
  • Developed shared components
  • Implemented new features
  • Optimized existing solutions
  • Responsive design
  • Code reviews
  • Wrote unit, UI, and integration tests
  • Created documentation
MEGOGO | Engineering Team Lead
https://megogo.net

Collaborated with engineers, designers, product managers, VP of Engineering, and CTO to deliver top-quality products to market. Mentored and developed team members. Reviewed technical project specifications, performed code quality checks, conducted interviews, and improved and modernized products.

  • Led the creation of a Smart TV app and a player for the website
  • Managed R&D department, overseeing the development of an embed player later used in Diia TV during the occupation to broadcast Ukrainian news
  • JS, TypeScript, React, Redux, Redux-Thunk, Redux-Saga, Reselect, StyledComponents, Jest, Enzyme, WebdriverIO, NodeJS
  • Mentoring
  • Management
  • Code reviews
  • Development of embed players and apps for Smart TVs, PlayStation, Xbox, and mobile devices (iOS/Android)
Western Digital | Senior Software Developer
https://www.westerndigital.com

Developed the 'My Cloud 2' mobile app using React Native for iOS and Android platforms. 'My Cloud' is a line of personal storage devices and multifunctional servers developed and sold by Western Digital Corporation. Collaborated closely with the hardware department.

  • JS, React-Native, Redux, Redux-Thunk, Reselect, Jest, Enzyme
  • Refactoring
  • Mobile app development (iOS/Android)
  • Developed shared components
  • Implemented new features
  • Optimized existing solutions
  • Wrote unit, UI, and integration tests
  • Created documentation
Kyivstar | Senior Frontend Developer
https://kyivstar.ua/uk/mm

Developed the first mobile app for Android/iOS based on React Native as an MVP, which served as the foundation for launching a full-fledged mobile app.

  • JS, React, Bootstrap, CSS3, HTML5
  • Refactoring
  • Developed shared components
  • Implemented new features
  • Optimized existing solutions
PUBLICATIONS
Media Hackathon 2018 Nov 23, 2018
DOU
https://dou.ua/forums/topic/25372/
AWARDS
ETHKyiv AI Agents Reloaded Hackathon Winner 2025-02
ETHKyiv

Won 1st place at ETHKyiv AI Agents Reloaded Hackathon for building an innovative Web3 AI-powered solution with autonomous agent capabilities.