Andy 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.

🚀 The top 3% of talent in Backend & Cloud Engineering ✅ Senior Node.js Developer | 10+ Years of Experience | Solution Architecture & High-Load Systems ⚡ AI-assisted backend workflows are excellent for speed — architecture still requires engineering experience. 🙋‍♂️ Click Hire or Invite Senior Node.js Backend Developer | Full-Stack Development Specialist 💻 WHAT YOU GET Senior Node.js Backend Developer & Back End Developer - 10+ years of architecting high-performance, secure, and bulletproof backend systems using Node.js, Express.js & NestJS. Full Stack Node.js React & Node JS Developer - end-to-end engineering, effortlessly connecting Node JS backends with React, Next.js, Vue.js, Angular, React Native, and Flutter ecosystems. Cloud & Solution Architecture Expert - advanced infrastructure design across AWS Development, Google Cloud Platform (GCP), and Serverless Stack handling millions of daily requests. 📊 ACHIEVEMENTS IN NUMBERS (SYSTEM IMPACT) 10+ years, 18,000+ hours, 60+ core infrastructures delivered as a Node.js Developer, Javascript Developer, and Full Stack Developer. Node.js Backend Developer for a High-Load SaaS Platform: Scaled the core Node.js, ExpressJS & NestJS Development architecture to handle 10M+ daily API requests with 99.99% uptime. Reduced database latency by 65% by redesigning complex MongoDB & PostgreSQL schemas and implementing advanced Redis caching strategies. Full Stack Developer React Node & Web Automation Specialist: Developed high-throughput data extraction services via Scraping Node engines, processing over 500k web pages daily into Elasticsearch for instant data visualization. Integrated complex IoT automation flows utilizing Node Red and customized event-driven Websockets architecture. Cross-Platform Integration (Node.js Flutter / React Native / Angular): Built scalable microservices and RESTful API gateways that seamlessly power Node.js Flutter apps, React Native setups, Node JS Angular interfaces, and modern Vue.js Node.js web clients. Optimized global checkout pipelines via Stripe & PayPal, boosting transaction success rates by 18%. 🎯 WHERE I DELIVER (EXPERTISE) As a Node.js Backend Developer / Back End Developer: I specialize in full-cycle Back-End Development, designing clean Microservices, event-driven systems, and secure authentication layers (JWT, OAuth2, RBAC) using TypeScript and JavaScript. As a Solution Architecture & Cloud Architect: I craft bulletproof system topologies, using Docker, Kubernetes, AWS Development, Google Cloud Platform, and modern Serverless Stack patterns to prevent single points of failure. As a Full-Stack Developer: Bridging the gap between server logic and client apps. Whether you need a React Developer, Python Developer for AI integrations, or an engineer who understands HTML5 & CSS, I deliver cohesive, end-to-end solutions. 🛠 HOW I BUILD (TECH STACK & SKILLS) Core Backend & Frameworks: Node.js, Node.js Developer tools, ExpressJS, NestJS, NestJS Development, Node, JavaScript, TypeScript, Python Developer integrations. Databases & Search: MongoDB, PostgreSQL, Redis (Caching/Queues), Elasticsearch, Data Visualization systems. Cloud & DevOps: Cloud Architecture, Solution Architecture, AWS Development, Google Cloud Platform (GCP), Serverless Stack, Docker, Kubernetes, CI/CD pipelines (GitHub Actions, Jenkins). Protocols & Ecosystems: RESTful API, GraphQL, Websockets, Microservices, Node Red automation, Scraping Node scripts. Frontend Alignment: React, Next.js, Vue.js, Angular, HTML5, CSS, Front-End UI sync. Mobile Sync: Node.js Flutter configurations, React Native API sync, Smartphone endpoints. 🤖 AI-DRIVEN BACKEND ARCHITECTURE & WORKFLOW As an advanced Node.js Backend Developer, I combine a decade of core engineering experience with AI-native coding agents (Cursor, Claude Code, GitHub Copilot, OpenAI GPT-4o, Claude Sonnet) to: Accelerate Prototyping: Deliver production-ready API features and microservices 35% faster without sacrificing stability or architectural integrity. Automate Testing & QA: Rapidly generate bulletproof integration tests, mock data structures, and automate CI/CD pipeline verification. AI App Development: Integrate intelligent LLM layers, vectors, and background automations directly into your existing Node JS ecosystem. ⚡ SERVICES I OFFER Scalable Microservices & RESTful API Architecture Design Database Schema Optimization (PostgreSQL, MongoDB, Redis caching) Cross-platform backend integration for Node.js Flutter, React Native, and Web apps Production-ready deployments via AWS, GCP, and Serverless Stack Automated web scrapers (Scraping Node) and automation systems (Node Red) Looking for a reliable, elite Node.js Backend Developer | Full Stack Developer | Solution Architect who writes clean, maintainable code and respects your business timelines? Let’s connect! Send me a message with your project brief or architecture ideas, and let's structure your next big win. 🚀