Johann is a Senior Full-stack Developer with up-to-date knowledge of modern React tools and JavaScript frameworks and libraries for building and delivering distributed software solutions with attention to quality. He works on technologically sound and aesthetically impressive projects, developing user interface components and front-end solutions that enhance the user experience on multiple projects.
- Led the development of complex healthcare web applications using React.js, Next.js, and TypeScript, ensuring scalability, performance, and accessibility.
- Built rich data visualization dashboards with D3.js and Echarts,
transforming large medical datasets into actionable insights for clinicians and stakeholders.
- Designed and implemented responsive UI components with Tailwind CSS, improving usability and consistency across applications.
- Streamlined development workflows by setting up a CI/CD pipeline with GitHub Actions, reducing release cycle times, and ensuring reliable deployments.
- Mentored junior developers and introduced best practices in code quality, testing, and performance optimization.
- Built and deployed a cross-platform React Native app with Expo and TypeScript, delivering a reliable and performant mobile experience for Bright Uro’s urology diagnostic platform.
- Integrated advanced features such as OCR for medical document processing and FDA-compliant login flows, ensuring regulatory compliance and secure data handling.
- Designed and implemented UI components with a consistent design system across React Native and React.js applications, improving development efficiency and user experience.
- Collaborated with backend teams, QA, and clinical experts to align technical delivery with medical industry requirements and user needs.
Improved legacy React code based on best practices and served as a lead front-end developer for improvements.
Worked with Ethereum, Polygon, and other EVM-compatible chains like deploying and integrating Smart Contracts using Solidity, Web3.js, and Ether.js.
Led the migration of a large-scale web application from React and Node.js to Next.js and GraphQL, making significant performance and maintainability improvements.
Trained the development team for working with Next.js and GraphQL and mentored junior developers.
Refactored and updated the existing React Native applications for iOS and Android platforms.
Full-stack Developer for Open-source Crypto Analytics Site
2023 - 2024 (1 year)
Remote
Implemented pixel-perfect and responsive front-end 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 back end, improving code maintainability and quality.
Implemented Redux for global state management, optimizing data flow and ensuring seamless synchronization of user actions across components.
Optimized state updates and reduced unnecessary re-renders by integrating Redux-Thunk for asynchronous actions.
Designed, built, and released front-end solutions on the Intellimize Editor app, adding new functionalities and implementing pixel-perfect Figma designs. Created new hooks to clean up the codebase, updated the UI components, fixed lint issues, and wrote unit tests on the solution.
Assured’s Claims Intelligence Platform helps users ingest and augment structured claims data, empowering them to make good decisions. Designed and built the website using Webflow CMS, Webflow UIKit, JavaScript, jQuery, HTML, and CSS. Implemented responsive UI solutions and integrated third-party systems with the platform.
Modzy is the ModelOps and MLOps software platform that businesses use to deploy, integrate, run, and monitor AI solutions. Built an admin dashboard for the platform, implemented designs and several complex charts, and integrated GraphQL queries and mutations.