Darii Hyriak

Responsible for the development and maintenance of web applications using the full MERN stack, delivering production-ready features. Built dynamic user interfaces with React.js and TypeScript, integrated with a Node.js/Express.js backend. Implemented components per Figma designs, ensuring visual consistency and responsiveness with Material UI or Tailwind CSS. Worked with MongoDB to design and maintain data structures. Implemented JWT-based authorization and secure access to resources. Collaborated with marketing to integrate analytics tools and CRM forms (Google Analytics, Facebook Pixel) to support conversion tracking.

Developed and maintained React-based UIs for clients across Europe, focusing on performance, stability, and high-quality implementations. Built modular components, utilized patterns like HOC, and created custom hooks to improve scalability. Implemented performance optimizations (lazy loading, React.memo, Suspense, code splitting), Error Boundaries, and Web Workers for heavy computations. Worked with TypeScript, participated in code reviews, and produced technical documentation. Configured dev/stage/prod environments using Vite and supported deployment processes and build automation.