Kostiantyn Berehovyi

Senior React / React Native Developer with strong expertise in building scalable, high-performance web and mobile applications.

I specialize in React, React Native, and Next.js, delivering production-ready solutions with clean architecture, maintainable code, and excellent user experience. I have solid experience in developing complex commercial products, including payment integrations, REST/GraphQL APIs, real-time features, and advanced state management.

🔹 Web Development: Next.js (SSR, SSG, ISR), performance optimization, SEO, scalable frontend architecture

🔹 Mobile Development: React Native (iOS & Android), native modules integration, app performance tuning

🔹 Architecture & Quality: TypeScript, modular architecture, test coverage (unit, integration, e2e), CI/CD

🔹 Backend Collaboration: API design, authentication flows, secure data handling

I focus not just on writing code, but on building reliable, business-oriented solutions that scale. Strong attention to performance, UX details, and long-term maintainability.

Open to challenging projects, product development, and technical leadership opportunities.

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Lviv National Polytechnic

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