Scaling an enterprise application requir​​es more than just a coder; it demands an architect who understands how to bridge high-load systems with seamless user interfaces. With 16+ years of engineering experience and a decade focused on the Node.js ecosystem, I help companies build resilient, business-ready solutions. As a seasoned Full Stack developer and Senior Node.js developer, I specialize in taking ownership of complex digital products, ensuring your infrastructure is built to scale alongside your business. 🏆 𝐏𝐑𝐎𝐕𝐄𝐍 𝐓𝐑𝐀𝐂𝐊 𝐑𝐄𝐂𝐎𝐑𝐃: • 2,000+ hours on Upwork as a Node.js developer delivering elite-level architecture. • 100% Job Success Score (JSS) as a lead backend developer on complex cloud engineering tasks. • Expert-level NestJS & Node.js skills for building production-ready APIs and microservices. • Extensive experience as a Full Stack developer, seamlessly integrating high-performance React frontends with robust Node.js services. 💎 𝐓𝐀𝐑𝐆𝐄𝐓𝐄𝐃 𝐃𝐎𝐌𝐀𝐈𝐍 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄: • FinTech & SaaS: Expert in building secure Node.js payment flows and reward systems (Stripe, Plaid). Experienced as a backend developer creating automated bank document verification engines. • E-commerce & Retail: Built large-scale retailer networks and management apps where I acted as a • Full Stack developer to ensure perfect harmony between React dashboards and server-side logic. • Cloud & Infrastructure: Specialist in AWS/GCP migrations. I ensure that every Node.js developer on the team follows best practices for Serverless (Lambda) and Monorepo architectures. 🛠 𝐓𝐄𝐂𝐇𝐍𝐈𝐂𝐀𝐋 𝐒𝐓𝐀𝐂𝐊: Backend: Node.js (NestJS, Express), TypeScript, Microservices. Frontend: React, Next.js, Redux (delivering a complete Full Stack developer approach). Cloud (AWS/GCP): Deployment on Lambda, S3, EC2, SQS, and BigQuery. Databases: PostgreSQL (TypeORM), MongoDB, DynamoDB — all optimized for Node.js environments. 💼 𝐑𝐄𝐀𝐋 𝐁𝐔𝐒𝐈𝐍𝐄𝐒𝐒 𝐕𝐀𝐋𝐔𝐄: As a backend developer, I don't just "make it work"; I design systems for High-Load and global traffic. My background in React allows me to understand the data requirements of modern interfaces, preventing bottlenecks before they happen. Whether you need a dedicated Node.js developer for a specific module or a Full Stack developer to lead a full-cycle project, I bring a professional, security-first approach to the entire development lifecycle. Looking for a Senior Partner to take ownership of your Node.js ecosystem? I am available for long-term collaboration. 📩 𝐈𝐧𝐯𝐢𝐭𝐞 𝐦𝐞 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐣𝐨𝐛, 𝐚𝐧𝐝 𝐥𝐞𝐭’𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐲𝐨𝐮𝐫 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐭𝐨𝐝𝐚𝐲!

I'm a web and application developer skilled in building full-stack, modern, & responsive applications with and without frameworks, as well as deploying them on the cloud or locally. My main strengths are clean & readable code, fast delivery, and broad expertise in various tools and platforms

Senior Full‑Stack Developer (Next.js / React / Supabase) | SaaS, AI Automation & High‑Performance Systems I build, scale, and fix modern SaaS platforms — fast, clean, and with a strong focus on long‑term maintainability. My specialty is taking existing codebases (including AI‑generated ones), refactoring them into stable architectures, and delivering features that actually move the business forward. What I do best: Refactor and improve AI‑generated or legacy React/Next.js code Build scalable SaaS architectures with clean module boundaries Fix performance issues, bugs, and structural problems Design and optimize Supabase/PostgreSQL schemas, RLS, and backend logic Implement new features end‑to‑end (UI → API → DB) Integrate third‑party APIs and automate workflows Deploy to Vercel, Docker, Hetzner, or custom infrastructure Tech I work with daily: Next.js, React, TypeScript, Supabase, PostgreSQL, Prisma, Node.js, Docker, Nginx, Stripe, OAuth/JWT, AI APIs. Real projects I’ve built or improved: nexmark.site — AI‑powered marketing assistant SaaS (research, content planning, automation) techplast.bg — manufacturing website with B2B lead capture Internal pricing & quoting system — automated workflow for a real manufacturing process Because I run my own SaaS and business operations, I focus on results, reliability, and clean architecture, not just writing code. Available immediately for long‑term SaaS work, refactoring, and feature development.

👋 Hi there! I’m a C# web developer with hands-on experience building fast, secure, and scalable applications using ASP.NET Core. I’ve developed and deployed a full-featured web project from scratch - giving me deep insight into the entire development lifecycle: from architecture and backend logic to responsive front-end interfaces. 🚀 Whether you need to develop a new web application, optimise an existing codebase, or fix bugs, I focus on clean code, solid architecture, and scalable solutions. 🔒 I'm serious about security, performance, and clear communication — and I treat your business goals like my own. 💬 Let’s talk about how I can help bring your idea to life or improve your current project.

I am an enthusiastic, reliable, and hardworking person with a great experience in Software Engineering with a strong Business background. I am excited about developing software applications, applying models and techniques, and finding insights. Along with developing software, I am extremely interested in the Business part of the ICT industry. I graduated from Fontys University of Applied Science with a degree in Software Engineering. As part of my Bachelor's study, I have done an internship at SIEMENS, Onmi, and a minor program in Data Science along with a tons of other projects. I am an experienced and knowledgeable user of tools such as Python, Javascript, PHP, and libraries including Laravel, React, Scikit-learn, Pandas, Numpy, etc. in addition to C#, Java, HTML, and CSS. After that, I've been working for multiple companies and clients on multiple complex projects of all sizes.

I build fast, scalable, and AI-powered web applications using React, Node.js, and Python — ready to solve real business problems from day one. I am a Full-Stack & AI Integration Expert specializing in building production-ready web applications with modern frameworks, clean architecture, and seamless LLM implementation. I don't just write code — I deliver enterprise-grade, working solutions. ◆◆ CORE SERVICES ◆◆ FRONTEND DEVELOPMENT ✓ React & Next.js — modern, high-performance SPAs and MPAs ✓ Responsive UI with Tailwind CSS ✓ Real-time interfaces with Socket io ✓ State management with Zustand and Redux ✓ Figma to React — pixel-perfect implementation BACKEND & DATABASES ✓ Node.js (Express) REST APIs ✓ Python (Django) backend development ✓ PostgreSQL, MongoDB, Supabase (Auth, Real-time, Edge Functions) ✓ Stripe payment integration AI INTEGRATION ✓ Generative AI apps with LangChain and RAG ✓ OpenAI & Anthropic API integration ✓ AI-powered automation and chatbots CLOUD & DEVOPS ✓ Azure, Docker, CI/CD pipelines ✓ Vercel deployment ◆◆ WHY WORK WITH ME ◆◆ ✓ Clean, maintainable code — easy to scale ✓ Fast delivery — I respect deadlines ✓ Clear communication — no surprises ✓ Real AI experience — not just buzzwords ◆◆ TOOLS & STACK ◆◆ ✓ React, Next.js, Node.js, Python, Django ✓ Supabase, PostgreSQL, MongoDB ✓ LangChain, OpenAI, Anthropic ✓ Stripe, Docker, Azure, Vercel, GitHub ✓ Zustand, Redux React Developer, Node.js Developer, Python Developer, AI Integration, LangChain, RAG, Generative AI, OpenAI API, Full-Stack Developer, Supabase, REST API, Next.js, Django, PostgreSQL, MongoDB, Docker, Azure, CI/CD, Stripe Integration, Payment Gateway, Zustand, Redux, State Management, Web Application Development, AI-Powered Apps.

I am a Senior Web Developer with over 20 years of experience in delivering high-performance, user-centric web applications. My expertise spans PHP, MySQL, and JavaScript, along with frameworks such as Laravel, Symfony, Zend, and CodeIgniter. I excel in performance engineering, focusing on profiling and refactoring to eliminate bottlenecks, enabling apps to feel instant. Designing scalable architectures for high-traffic environments is where I thrive, ensuring systems remain stable during data growth. I have a strong track record of building greenfield projects and revitalizing complex systems, always with real-world ROI in mind. My proficiency in secure API integrations covers payments, social networks, CRMs, and more, while my commitment to clean, maintainable code ensures your team can move quickly and efficiently. If you need a developer who understands how to align technology with business objectives, let's discuss your project.

Hello! 👋 I'm a Full Stack Web Developer with over 5 years of experience in building web applications. I'll guide you through the entire development journey, from planning the architecture to delivering results. Whether it's version control or coding, I follow industry standards every step of the way. I'm a great communicator and problem solver, always ready to collaborate! My Technology Stack: Frameworks: ✅ React ✅ Next.js ✅ NestJS ✅ Express.js Technologies: ✅ JavaScript / HTML / CSS ✅ Typescript ✅ Redux / Redux-Toolkit / Mobx ✅ RTK Query / React Query / GraphQL ✅ Material UI / SCSS / Styled components / Tailwind CSS ✅ Prisma / Sequelize / TypeORM / Mongoose ✅ RabbitMQ ✅ Data visualization tools Testing tools: ✅ RTL / Jest / Vitest ✅ Cypress / Supertest Database: ✅ PostgreSQL / MongoDB ✅ Redis CI/CD: ✅ Github Actions ✅ Jenkins ✅ AWS Feel free to reach out anytime if you have questions or need assistance. 🚀

I’m not just a senior web developer—I lead products from sketch to shipped. With 15+ years across engineering, web development, project leadership, and business, I translate goals into technical roadmaps, de-risk delivery, and ship reliable, maintainable software. I plan the work, align stakeholders, coordinate designers and developers, and keep scope, budget, and timelines on track—while writing clean, testable code, enforcing standards and QA, and keeping communication crisp so there are no surprises—only releases.

Hi there! I'm Plamen, a Sofia based Senior Full Stack Developer, I'm developing Web Apps and RESTful APIs for 15 Years. I have worked on and delivered tens of production software that ranges from small tools, web portals, admin panels, back-office systems to complex SaaS applications on most of the JavaScript and PHP platforms available. I also have strong experience with API Integration and have worked with many API Providers: * Social Media Networks (Facebook Marketing, Instagram, Twitter). * Google APIs (Adwords, Ads, Analytics, Sheets, Drive). * Accounting & Payment Gateways: (E-conomic, Stripe, PayPal). * Document processing & Merge: (Aspose, Reporting Cloud). * Other APIs. In addition to my solid technical experience and background, working with several teams and on many projects during the past years, gives me enough experience to handle your project from A to Z. During my career, I have worked with Business Owners, Founders, CTOs, Project Managers, and other developers, and this gives me the experience to translate your business requirements into codes and apps. - Myself: * International business cultural background. * Good work ethics with excellent communication and interpersonal skills. * Interest in working with new technologies and thinking outside the box. Starting a new project? Feel free to invite me to your job to discuss it further and provide you with my suggestions to take the project to a new level.