Heorhii K.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I am a Full Stack Developer and Web Developer with 8+ years of experience building scalable web applications, backend systems, and modern frontend interfaces. I focus on clean architecture, performance optimization, and long term product stability across complex Web Development projects. My work includes full cycle Full Stack Development - from system design and architecture planning to frontend development and backend development, APIs, cloud infrastructure, and production deployment. I often work on products where frontend and backend need to be tightly integrated into a single scalable system. Over the years I have built SaaS platforms, AI powered applications, enterprise systems, and Web3 products. A significant part of my experience comes from improving and scaling existing live systems where performance, structure, and maintainability are critical. I treat Full Stack Development as product engineering, not just implementation. The goal is always to build systems that are scalable, secure, and easy to extend over time. ⚙️ Backend Development As a Backend Developer, I work with: • Node.js, Express.js, Nest.js • Python (Django, Flask, FastAPI) • REST APIs, GraphQL, WebSockets • Microservices architecture and system design • Authentication systems (OAuth, JWT, session based auth) • Firebase, Supabase, custom backend solutions • AWS, GCP, Azure cloud infrastructure I usually design backend and frontend architecture together as part of Full Stack Development to ensure consistency, scalability, and performance across the entire system. 💻 Frontend Development As a Frontend Developer, I work with: • React.js, Next.js, Vue.js, Nuxt.js, Angular • TypeScript and JavaScript • Component based architecture • Responsive UI and modern web interfaces • State management (Redux, Zustand, Context API) • Frontend performance optimization and SEO friendly structure I build frontend systems that are fast, maintainable, and aligned with backend architecture. ☁️ Cloud, DevOps & Infrastructure • AWS, GCP, Azure cloud platforms • Docker and Kubernetes • CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins) • Deployment automation and release pipelines • Monitoring and performance tracking I ensure applications are production ready and scalable under real world load as part of my Web Development and Full Stack Developer workflow. 🎨 UI/UX & Product Engineering • Figma to production implementation • Data driven UI systems • Responsive and adaptive design systems • UX optimization based on user behavior • Collaboration with design and product teams 🧠 AI Powered Web Development As an AI Developer, I integrate AI capabilities into web applications when they improve functionality, automation, or user experience. This includes: • OpenAI API integration for web applications • LangChain and LlamaIndex based AI systems • RAG architectures for knowledge based platforms • AI chatbots and conversational interfaces • Recommendation systems and personalization engines • Predictive analytics and data driven logic • Automation workflows powered by AI I focus on embedding AI directly into product workflows so it becomes a natural part of the application rather than a separate feature. ⛓ Web3 & Blockchain Development I also work on blockchain and Web3 applications where decentralization or token based systems are required. • Smart contracts integration and Web3 logic • NFT platforms and marketplaces • Crypto wallets and transaction systems • Blockchain based web applications • Decentralized application (dApp) development My focus is on building usable Web3 products that feel like real applications, not just technical demos. 🌍 Industries I Work With FinTech • Healthcare • SaaS • E-commerce • EdTech • Real Estate • Logistics • AI Platforms • Web3 Products • ERP/CRM Systems • Marketplaces • Data driven dashboards ⭐ Core Skills Full Stack Developer, Full Stack Development, Web Development, Web Developer, Frontend Developer, Backend Developer, AI Developer, React.js, Next.js, Vue.js, Node.js, Express.js, Nest.js, Python developer, Django, Flask, FastAPI, JavaScript, TypeScript, backend development, frontend development, API development, REST APIs, GraphQL, WebSockets, cloud architecture, AWS, GCP, Azure, microservices, CI/CD pipelines, Docker, Kubernetes, AI integration, OpenAI API, LangChain, LlamaIndex, RAG systems, blockchain development, Web3 development, smart contracts, NFT marketplace, SaaS development, scalable web applications, system architecture, performance optimization, database design, PostgreSQL, MongoDB, Firebase 💬 I work on Full Stack Development and Web Development projects where scalability, architecture quality, and product thinking are essential. If you are looking for a Full Stack Developer, Frontend Developer, Backend Developer, or AI Developer who can handle both frontend and backend with AI or Web3 integration, feel free to reach out.