Kirill G.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 Mar 30, 2026.

Business logic? Technical execution? I handle both before my morning coffee. Let’s bring your product vision to life — one solid line of code at a time. I’m a full-stack developer with a strong product mindset, experienced in building and scaling complex applications for startups, SaaS platforms, e-commerce, fintech, and beyond. I don’t just code features — I design systems that are robust, maintainable, and built to grow. AI-Driven Workflow Tools like Cursor, Windsurf, and Bolt.new are deeply integrated into my development process. I use them to accelerate implementation, eliminate repetitive tasks, and elevate code quality — typically reducing development time by ~20% without compromising standards. I also apply AI-assisted testing and documentation, ensuring cleaner codebases and faster onboarding for teams. Core Values: Build exceptional products Deliver measurable results Focus on long-term impact, not quick fixes Tech Stack Languages: JavaScript (ES5–ESNext), TypeScript, HTML5, CSS3 Frontend: React, Next.js, Redux, MobX, React Query Modern React Hooks (useEffect, useMemo, useReducer, etc.) UI libraries: MUI, Ant Design, Styled Components, Chakra UI, Semantic UI, Tailwind CSS, Bootstrap UI/UX best practices, responsive & adaptive layouts Building complex, high-performance interfaces Backend: Node.js, NestJS, Express.js, Supabase RESTful & GraphQL APIs, 3rd-party integrations Databases: PostgreSQL, MySQL, MongoDB Other Expertise: GitHub / GitLab / Bitbucket Jira / Asana / Trello / Redmine Agile, Scrum & Waterfall methodologies SOLID principles, clean architecture, API design Linux, macOS, Windows If you’re looking for a senior full-stack developer who can jump into complex systems, communicate clearly, and deliver results fast — let’s talk. Send me an invitation, and let’s discuss how I can help make your project a success.