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I'm a frontend-focused developer with 4+ years of experience in React, React Native, and full-stack development using the MERN stack. I'm currently pursuing a Master of Science in Information Technologies at Sakarya University to support my international goals. I’m skilled in building scalable, performant, and responsive applications with a strong focus on modern frontend technologies.…

Bahattin Umur

Front-End Developer, Web Developer, Full Stack Developer, +2

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I'm a frontend-focused developer with 4+ years of experience in React, React Native, and full-stack development using the MERN stack. I'm currently pursuing a Master of Science in Information Technologies at Sakarya University to support my international goals. I’m skilled in building scalable, performant, and responsive applications with a strong focus on modern frontend technologies.…

Available to hire

I’m a frontend-focused developer with 4+ years of experience in React, React Native, and full-stack development using the MERN stack.

I’m currently pursuing a Master of Science in Information Technologies at Sakarya University to support my international goals. I’m skilled in building scalable, performant, and responsive applications with a strong focus on modern frontend technologies.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

German

Beginner

Work Experience

Frontend React Developer at MimCode - Istanbul, Turkey

July 1, 2025 - July 1, 2025

Led frontend initiatives to deliver scalable, performant UIs. Reduced unnecessary re-renders with useMemo and useCallback, and improved build times using Vite. Implemented unit/integration tests with React Testing Library and Jest, migrating to Vitest. Built projects using Next.js with CSR and SSR strategies, and integrated third-party APIs to enhance features. Collaborated with backend teams to ensure smooth data flow and routing, and leveraged React Developer Tools and Redux DevTools for debugging. Employed modern libraries such as React Router, Redux Toolkit, Axios, Tailwind CSS, Material-UI, Bootstrap, and Formik/Yup. Participated in architecture decisions, product roadmaps, and cross-team knowledge sharing.

Mobile React Native Developer at MimCode - Istanbul, Turkey

May 1, 2023 - May 1, 2023

Integrated RESTful APIs and managed state with Redux/Redux Toolkit. Resolved cross-platform styling issues for Android/iOS, tested on real devices and emulators, and published apps on Google Play and Apple App Store. Translated Figma UI designs into pixel-perfect implementations, and used NativeWind, React Navigation, Axios, and Lodash to deliver polished mobile experiences.

Full-Stack MERN Developer at MimCode - Istanbul, Turkey

March 1, 2022 - March 1, 2022

Developed backend with Express.js and MongoDB Atlas using Mongoose. Implemented authentication/authorization with JWT and bcrypt. Built dashboards with role-based access control and CRUD operations. Designed scalable MongoDB schemas and nested clusters. Used Nodemon, CORS, and Morgan for development and security. On the frontend, leveraged React Router, Redux Toolkit, Context API, Redux Toolkit, and Zustand to build responsive UI components and maintain state. Maintained code quality via Prettier and ESLint.

Frontend React Developer at MimCode

July 1, 2025 - July 1, 2025

Improved app performance by reducing unnecessary re-renders using useMemo and useCallback. Utilized Vite for faster builds and better developer experience. Built projects using Next.js with CSR and SSR strategies. Integrated third-party APIs to enhance app functionality and user experience. Collaborated closely with backend teams to ensure smooth data flow and routing. Used React Developer Tools and Redux DevTools for debugging and state monitoring. Applied modern frontend libraries such as React Router, Redux Toolkit, Axios, Tailwind CSS, Material UI, Bootstrap, Formik & Yup. Participated in architecture decisions and product roadmaps. Engaged in peer reviews and cross-team knowledge sharing.

Mobile React Native Developer at MimCode

May 1, 2023 - May 1, 2023

Integrated RESTful APIs and managed state with Redux and Redux Toolkit. Fixed cross-platform styling issues between Android and iOS. Tested apps on real devices and emulators for optimal performance. Participated in app publishing on Google Play and Apple App Stores. Translated Figma UI designs into pixel-perfect functional code. Used libraries such as NativeWind (TailwindCSS), React Navigation, Axios, Lodash.

Full-Stack MERN Developer at MimCode

March 1, 2022 - March 1, 2022

Developed backend with Express.js and MongoDB Atlas using Mongoose. Implemented authentication/authorization with JWT and bcrypt.js. Built dashboards with role-based access and CRUD operations. Designed scalable MongoDB schemas and nested clusters. Used Nodemon for efficient development, CORS for secure cross-origin handling, and Morgan for request logging. Utilized core frontend tools such as React Router and Redux Toolkit to build responsive UI components. Managed global/local state with Context API, Redux Toolkit, and Zustand. Maintained code quality via Prettier and ESLint.