Denys 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.

Need to improve an existing website or web application, connect services, or deliver the next set of features? I help with WordPress and Magento websites and full-stack applications built with React, Next.js, Node.js, NestJS and Supabase. I'm Top Rated on Upwork, with $50K+ earned and 34 completed contracts. My work on Lenovo Studio AI includes a Lead Frontend Developer role, Marketing Center architecture, ongoing system updates and participation in its Azure migration. I also lead development of useTavio, an HR SaaS platform with recruiting, leave management, time tracking and team workload functionality. What I can help with: • MVP development: a focused first version of a web app or SaaS product with React, Next.js, Node.js and NestJS. We define the core user flow, prioritize essential features and deliver in small, testable milestones so you can validate the product before expanding it. • React and Next.js applications: dashboards, client portals and responsive interfaces. • Node.js and NestJS: APIs, integrations and business workflows. • Supabase: application development and integration with React and Next.js products. • WordPress, Elementor and WooCommerce: website development, existing-site improvements and integrations. • Magento: development and improvements to existing e-commerce websites. • Existing products: bug fixes, new features and ongoing development through reviewable pull requests. My approach is to understand the current setup, agree on a focused first milestone, implement and test the changes, and keep you informed about progress and technical decisions. Share your brief, current blocker or the feature you need. I'll suggest a practical first step.