Sergii D.

Mobile App Development

I also specialize in mobile app development using React Native, helping companies launch scalable cross-platform applications.

As a mobile app developer, I've delivered products for healthcare, fintech, logistics, education, and SaaS companies -- from mobile app design and architecture to deployment and optimization. My experience includes React Native Mobile applications and React Native Full Stack solutions connected to cloud infrastructure and modern APIs.

Shopify & Webflow

I've completed 30+ Shopify and Shopify Webflow projects, helping brands improve customer experience, storefront performance, and conversion rates.

As a Shopify front end developer, I build custom themes, Shopify Hydrogen storefronts, headless commerce solutions, and modern eCommerce experiences. I also work with Webflow teams to bridge design and development through scalable implementations and performance optimization.

AI & Python

As a front end developer React and Python specialist, I've contributed to AI-powered SaaS products featuring OpenAI integrations, vector search, intelligent chat interfaces, workflow automation, and custom dashboards.

My experience combines Python APIs, LLM technologies, automation workflows, and modern SaaS architecture to build AI products that scale.

💻 Technology Stack

React • React Next • React NextJS • Next.js • React Native • React Native Mobile • React Native Full Stack

TypeScript • JavaScript • Node.js • NestJS • Express • Fastify

Shopify • Shopify Webflow • Webflow • WordPress

MongoDB • PostgreSQL • MySQL

AWS • Google Cloud • Azure

Tailwind • Storybook • Redux • GraphQL

📈 Proven Experience

During 10+ years as a front end web developer and front end developer react, I've helped startups and enterprise businesses launch products from MVPs to enterprise SaaS platforms. More than 100 React and Next.js applications have been successfully delivered with a focus on scalability, clean architecture, and long-term maintainability as a web developer, web app developer, and full stack web developer.

I've completed 30+ Shopify and Shopify Webflow implementations as a Shopify front end developer React, creating custom storefronts, headless commerce experiences, and conversion-focused user journeys.

💎 Whether you need a front end developer React, Shopify front end developer React, React Native Full Stack developer, mobile app developer, web developer, web app developer, SaaS developer, full stack web developer, Webflow expert, or full stack developer Next.js partner, I'd be happy to discuss your project!