Years of experience: 10

ReactC#JavaScriptCSSC++Rust

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Johann's Career Path
Senior Full-Stack DeveloperJun. 2024 -
Dec. 2024
LunarCrushSenior Full-Stack Developer
United States- Improved legacy React code based on best practices Served as a lead front-end developer for improvements and mentored junior developers - Worked with Ethereum, Polygon, and other EVM-compatible chains, including deploying and integrating smart contracts using Solidity, Web3.js, and Ethers.js - Led migrating a large-scale web application from React and Node.js to Next.js and GraphQL, achievi...
Full-Stack Developer for Open-Source Crypto Analytics SiteOct. 2023 -
Jun. 2024
Escape VelocityFull-Stack Developer for Open-Source Crypto Analytics Site
United States- Implemented pixel-perfect and responsive frontend pages using React and Material UI, implementing dynamic components like tables, dialogs, modals, etc. - Developed RESTful APIs with Node.js and Express to handle user authentication and support CRUD operations like task management, category filtering, etc. - Integrated TypeScript for type safety across the front-end and backend, improving co...
Frontend EngineerMar. 2023 -
Aug. 2023
SparkrockFrontend Engineer
United States- Developed web frontend pages using Angular 10, TypeScript, Bootstrap, and LESS/CSS - Translated Figma designs into pixel-perfect, mobile-friendly interfaces and built reusable Angular components - Managed data by updating Microsoft 365 tables and integrated backend APIs built with .NET Core - Collaborated with clients to gather and analyze requirements while providing comprehensive technica...

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