Den Khmura

@den_khmura

Senior Web and Mobile Developer

Ukraine
English, Ukrainian
About me
I am a highly skilled and experienced web developer with over five years of expertise in designing, developing, and optimizing advanced websites and mobile applications. My strong creative and analytical abilities enable me to craft innovative and efficient solutions tailored to meet client needs. Known for my attention to detail and commitment to quality, I thrive in collaborative team environments, consistently contributing to successful project outcomes while maintaining a focus on delivering exceptional user experiences.... Read more

Skills

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den_khmura
Den Khmura
Offline • 
Average response time: 1 hour

See my services

Custom Websites
I will develop website as a senior front end react and next developer
From$10,000 / projectMore details
Cross-Platform Development
I will develop mobile react native app
From$7,000 / projectMore details

Portfolio

Work experience

Senior Next.js Developer

Writesonic • Full-time

Jun 2025 - Mar 2026 • 9 mos

Built and scaled high-performance AI-driven web applications using Next.js and React in a fast-paced product environment. • Developed scalable, SEO-optimized features using Next.js (SSR, SSG) • Integrated AI-powered workflows and APIs for content generation • Optimized application performance, reducing load times and improving Core Web Vitals • Collaborated closely with product and design teams to deliver user-centric features • Maintained clean, modular architecture with TypeScript and modern best practices

Senior React Developer

Allye • Full-time

Feb 2023 - Jan 2025 • 1 yr 11 mos

Led frontend development for scalable dashboards with a focus on performance and maintainability. • Built responsive and high-performance UI using React and Next.js • Implemented reusable component architecture and scalable state management • Worked on performance optimization, code-splitting, and lazy loading • Integrated REST APIs and handled complex data flows • Collaborated with cross-functional teams in an agile environment

Senior React Native Developer

WizKid • Full-time

May 2022 - Apr 2023 • 11 mos

Independently developed and deployed a cross-platform mobile application from scratch, focusing on performance, scalability, and user experience. • Designed and built the mobile app end-to-end using React Native • Successfully deployed the application to both App Store and Google Play • Integrated third-party services (payments, analytics, push notifications) • Optimized performance and reduced crashes across iOS and Android • Implemented clean, scalable architecture and reusable components • Collaborated with backend teams to ensure seamless API integration