Oleksii H.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.

Senior Full Stack Developer with 𝟳 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗶𝗻𝗴 𝗶𝗻 𝗡𝗼𝗱𝗲.𝗷𝘀, I excel in creating high-performance, scalable backend systems and web applications. I am passionate about delivering optimized and maintainable code, ensuring robust backend performance for complex projects. 𝗠𝘆 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗮𝗰𝗵𝗶𝗲𝘃𝗲𝗺𝗲𝗻𝘁𝘀 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: - Building a highly scalable backend system using Node.js for an e-commerce platform that improved system efficiency and user experience - Developing a Node.js API for a financial services app that processes complex data in real-time with a focus on high availability and security - Designing and implementing RESTful APIs with Node.js and Express.js that integrate seamlessly with various frontend frameworks and improve client-server communication - Optimizing Node.js applications for high traffic, significantly reducing response times x4 and ensuring better resource management 𝗪𝗵𝗮𝘁 𝗺𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝗮𝘆 𝗮𝗯𝗼𝘂𝘁 𝗺𝗲: 🌟 "Oleksii's expertise in Node.js has been instrumental in improving our healthcare app's performance. He's always delivers results on time! Will recommend" - "Saisy" Project 🌟 "Oleksii's work on our backend has dramatically improved our system's reliability and scalability" - E-commerce Project 𝗛𝗼𝘄 𝘁𝗵𝗲 𝗵𝗶𝗿𝗶𝗻𝗴 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗹𝗼𝗼𝗸𝘀: 1. Share your project documentation and challenges with me. 2. I will review the documentation and provide initial insights. 3. Let's schedule a call for an in-depth discussion and an interview. 4. If we align on expertise and values, we'll open a contract. 5. Onboard and start collaborating on your project. 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗦𝗸𝗶𝗹𝗹𝘀: 🔹 Node.js, Express.js, NestJS 🔹 RESTful API Development 🔹 GraphQL Integration 🔹 WebSockets, Socket.io 🔹 JWT Authentication 🔹 MongoDB, PostgreSQL, MySQL 🔹 Docker, Kubernetes for deployment 🔹 Unit Testing with Mocha, Chai, Jest Software Engineering Skills: 📚 JavaScript, TypeScript, ES6 📚 Git, GitHub 📚 Strong knowledge of Asynchronous Programming in Node.js 📚 Building highly performant and scalable applications following best practices 📚 Experience with Microservices Architecture 📚 Proficiency in Agile methodologies 📚 Strong problem-solving and debugging skills If you are ready to discuss your Node.js project, click the 🟢𝗜𝗡𝗩𝗜𝗧𝗘🟢 button, and let's connect 🤝