Eduard S.

Backend Developer Node / Node.js developer / Backend Nodejs

🚨 Is your product slowing down as users grow - because the backend nodejs can’t keep up, APIs get messy, and releases become risky? I’m a Senior software engineer with 15+ years in production and 120+ delivered web applications across SaaS, eCommerce, FinTech, logistics, and enterprise software. My core role as a backend developer is supported by deep javascript developer experience, helping me build scalable systems that move from MVP to stable platforms serving thousands of users. 🏆 100% client satisfaction on Upwork - Proven Success built through reliable delivery across complex production projects. ⚡ 15+ years in production - Performance-First experience designing backend nodejs systems that remain fast under load. 🕒 120+ delivered web applications - Reliable Collaboration led by an experienced node.js developer working closely with qa, product owners, and stakeholders. 📈 10k+ operations daily - enterprise platforms supported by stable react node services, scalable architecture, and safe releases. 🚀 1k to 50k concurrent users - production environments where my node.js developer work focuses on performance, uptime stability, and release safety. What I Build ✔ SaaS platforms - multi-tenant dashboards, subscriptions, billing ✔ eCommerce systems - checkout, integrations, analytics ✔ FinTech tools - including a stock trading app plus day trading dashboards ✔ Enterprise automation platforms handling 10k+ operations daily 🧩 Backend Architecture & APIs I specialize in clean backend nodejs architecture built on modern node.js standards. I contribute as a node.js developer, leading service design and API structure across production systems. For teams that need dedicated implementation support, I also step in as a node js developer focused on stable and scalable delivery. ✔ API design in the role of api integrator, covering backend developer node responsibilities ✔ Production services delivered in the capacity of node.js backend developer ✔ Additional service-layer ownership provided as nodejs backend developer ✔ Stable deployments managed with backend engineer discipline ✔ Optimization at the node runtime level when performance bottlenecks appear I’ve rebuilt legacy services, stabilized unstable releases, and redesigned monoliths into scalable backend nodejs environments. On complex systems, I contribute as a node.js developer with a focus on maintainable code and measurable performance gains. 🧠 NestJS & Structured Systems Working as a nestjs developer, I implement scalable modules using nestjs backend patterns. ✔ Authentication, RBAC, billing logic, background jobs ✔ Queue systems and async processing ✔ Migration and refactoring of legacy stacks 🎨 Full Product Delivery When projects require ownership across layers, I also operate as a full stack developer with responsibility across the product lifecycle. For complete web delivery, my web developer experience helps connect backend architecture with product-facing functionality. ✔ UI implementation as a react developer using react with structured react js patterns ✔ Clean front end architecture delivered through front end developer react work ✔ Scalable builds using node.js react.js with structured react node flows ✔ Rapid MVP delivery via node.js express.js react.js next.js javascript typescript mvp ✔ Mobile support with react native 📊 Data & Automation ✔ Cross-service automation combining python nodejs ✔ Tooling and scripts delivered as a python developer ✔ Reporting pipelines implemented as data engineer ✔ AI integrations referencing cnn models when required 🤝 Cross-Stack Collaboration I integrate easily into mixed environments. ✔ Collaboration with java developer teams using java spring ✔ Hybrid architectures in java node.js ecosystems ✔ Maintenance and integrations for ruby on rails platforms ✔ UI layers built on laravel vue ✔ Full-stack environments aligned with mern standards ⚙️ k-scale traffic is approached with the same performance discipline, clear monitoring, and release-safety standards. Why Work With Me? 🔹 Architecture-first thinking - clean systems before unnecessary complexity 🔹 Reliable engineering ownership across production systems 🔹 Clear documentation and smooth collaboration 🔹 Business-focused delivery - performance, scalability, ROI If you need someone who can stabilize complex services, strengthen backend architecture, and ship reliable React solutions - let’s discuss your project. 🚀