Saron Kebede

Developed and optimized scalable React.js and TypeScript applications serving 200K+ users, implementing dynamic routing, lazy loading, and performance tuning; built reusable component libraries with Storybook, TypeScript, and Material UI; implemented Redux Toolkit, Context API, and React Query for robust state and data management; collaborated with UX/UI designers to deliver responsive, accessible interfaces (WCAG 2.1).

Designed and maintained React.js SPAs supporting critical financial dashboards, improving load efficiency by 28%; revamped unit and integration testing with Jest and React Testing Library achieving 92% test coverage and reducing regression bugs by 45%; migrated legacy AngularJS components to React; led containerization of frontend builds with Docker, improving deployment consistency and developer productivity.

Engineered and maintained complex React.js + TypeScript single-page applications for financial dashboards, leveraging hooks and routing to improve performance. Led migration initiatives from AngularJS to React and Node.js, reducing technical debt and accelerating delivery of new modules by 35%. Integrated Node.js and Express backend services with React front ends to enable real-time data visualization and secure API communication, improving throughput by 22%. Achieved 92% automated test coverage with Jest, React Testing Library, and Cypress, lowering post-release defects by 45%. Built a shared design system using Material UI and Styled Components, and implemented OAuth 2.0 and JWT for secure authentication. Supported cloud deployments on AWS S3/CloudFront and Vercel, improving scalability and uptime.