Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a Senior Frontend Developer focused on building high-performance web and mobile apps with JavaScript, TypeScript, React, and React Native. Based in Antalya, Turkey, I craft scalable UI/UX with Redux, GraphQL, and cloud-backed features using Firebase and AWS. I have a track record of boosting performance by 20%, cutting bugs by 15%, and lifting user retention by 12% through data-driven UI/UX decisions and agile Scrum delivery. I also led CI/CD improvements, authored 30+ reusable components with Storybook, and mentored teammates to adopt best practices.…I am a Senior Frontend Developer focused on building high-performance web and mobile apps with JavaScript, TypeScript, React, and React Native. Based in Antalya, Turkey, I craft scalable UI/UX with Redux, GraphQL, and cloud-backed features using Firebase and AWS. I have a track record of boosting performance by 20%, cutting bugs by 15%, and lifting user retention by 12% through data-driven UI/UX decisions and agile Scrum delivery. I also led CI/CD improvements, authored 30+ reusable components with Storybook, and mentored teammates to adopt best practices.

Hakan Selami Baykara

Front-End Developer, Web Developer, App Developer





I am a Senior Frontend Developer focused on building high-performance web and mobile apps with JavaScript, TypeScript, React, and React Native. Based in Antalya, Turkey, I craft scalable UI/UX with Redux, GraphQL, and cloud-backed features using Firebase and AWS. I have a track record of boosting performance by 20%, cutting bugs by 15%, and lifting user retention by 12% through data-driven UI/UX decisions and agile Scrum delivery. I also led CI/CD improvements, authored 30+ reusable components with Storybook, and mentored teammates to adopt best practices.…I am a Senior Frontend Developer focused on building high-performance web and mobile apps with JavaScript, TypeScript, React, and React Native. Based in Antalya, Turkey, I craft scalable UI/UX with Redux, GraphQL, and cloud-backed features using Firebase and AWS. I have a track record of boosting performance by 20%, cutting bugs by 15%, and lifting user retention by 12% through data-driven UI/UX decisions and agile Scrum delivery. I also led CI/CD improvements, authored 30+ reusable components with Storybook, and mentored teammates to adopt best practices.

Available to hire

I am a Senior Frontend Developer focused on building high-performance web and mobile apps with JavaScript, TypeScript, React, and React Native. Based in Antalya, Turkey, I craft scalable UI/UX with Redux, GraphQL, and cloud-backed features using Firebase and AWS.

I have a track record of boosting performance by 20%, cutting bugs by 15%, and lifting user retention by 12% through data-driven UI/UX decisions and agile Scrum delivery. I also led CI/CD improvements, authored 30+ reusable components with Storybook, and mentored teammates to adopt best practices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Turkish

Fluent

Work Experience

Senior Frontend Developer (React / React Native) at Celadon

October 1, 2024 - October 1, 2024

Developed responsive JavaScript & TypeScript web/mobile apps with React and React Native; achieved 20% faster load times via lazy-loading, code-splitting and image optimization. Managed complex state with Redux & MobX, reducing production bugs 15% and simplifying onboarding for new engineers. Enabled real-time data sync with GraphQL subscriptions and WebSocket, delivering sub-second UI updates in high-traffic marketplaces. Integrated secure, scalable backends using Firebase Auth/Firestore and AWS S3; set up CI/CD pipelines that cut release time by 25%. Tracked user behaviour in Mixpanel, identified drop-off points and shipped A/B tests that lifted retention 12%. Authored 30+ reusable React components with Storybook documentation, shortening feature delivery by 18%. Automated JavaScript unit & E2E tests with Jest + Selenium, shrinking manual QA effort 30%. Mentored two junior developers and ran weekly code reviews; team first-time-right metric improved 10%.

Frontend Development Intern at Celadon

December 1, 2021 - December 1, 2021

Built UI components in React and Redux, following component-driven architecture and responsive design. Wrote Jest unit tests and performed cross-device UI testing, raising sprint bug-free ratio by 8%. Participated in daily scrum stand-ups and sprint planning; shipped 5 user stories per sprint on average.