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Barış Kandemir

@barkandemir

React Native Developer at UPT Payment Services & Electronic Money Inc., contributing reusable mobile components and building apps used by 500,000+ people.

Turkey

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At UPT Payment Services & Electronic Money Inc., I maintained existing mobile applications and contributed to the architecture of a new project, creating shared components and pages through Git submodules.

At Roofstacks, I developed a crypto exchange app and completed its user onboarding and KYC flows. I worked with backend engineers on API integration and secure transaction workflows.

At MetropolCard, I led development of the mobile app UI serving 500,000+ users and built backend integrations. I also created an order confirmation app that reduced manual approval time by over 30%, and wrote a bilingual article series on OWASP Mobile Top 10 for React Native.

Experience

Work history, roles, and key accomplishments

React Native Developer

UPT Payment Services & Electronic Money Inc.

Mar 2026 - Nov 2026 (8 months)

Maintained and improved existing mobile applications, contributed to the architecture of a new mobile project, and implemented state management and API data fetching with Redux and RTK Query.

React Native Redux Redux RTK Query Git Submodules Custom Hooks

React Native Developer

Roofstacks

May 2025 - Jan 2026 (8 months)

Developed a crypto exchange mobile application using React Native (Expo) and TypeScript, collaborated with backend engineers for API integration, and completed user onboarding and KYC flows.

React Native Expo TypeScript Redux API Integration KYC

React Native Developer

MetropolCard

Oct 2021 - May 2025 (3 years 7 months)

Led the development of the MetropolCard mobile app UI serving 500,000+ users, built backend integrations, managed CI/CD and release processes, and developed internal apps improving operational efficiency.

React Native NativeBase React Hooks Axios REST APIs AppCenter CodePush Kubernetes CI CD

Education

Degrees, certifications, and relevant coursework

Anadolu University

Management Information Systems, Management Information Systems

Gained a strong foundation in information systems, business processes, and data management, combining technical and managerial perspectives to support organizational decision-making.

Beykoz University

Computer Programming, Computer Programming

Focused on software development fundamentals, including programming languages, database systems, and application design, building a solid base for a career in software engineering.