Most AI SaaS ideas look simple in the beginning. Connect an AI API → Build a few screens. → Add login → Add payments → Launch. But once real users enter the picture, the product needs much more than a quick demo. → The dashboard has to feel clean. → The backend has to be reliable. → The AI feature has to work with real data. → Subscriptions need to be handled properly. → Users need accounts, roles, admin controls, and a smooth experience from day one. That is the difference between a quick demo and a scalable, production ready SaaS. And that is exactly what I build. ✅ 6+ Years of Experience as a React Full Stack Developer & Full-Stack Web & SaaS Development Specialist ✅ Specialized in React, Next.js, Node.js, TypeScript, Python & API Integrations, Fast Api ✅ Helping Startups, SaaS Businesses & Growing Companies Build Scalable Web Applications as a Full Stack Developer ✅ Trusted by Founders, Agencies, SaaS Teams & E-Commerce Brands I help startups, businesses, and growing teams build modern web applications, SaaS platforms, dashboards, APIs, and backend systems tailored to their business goals. As a React Full Stack Developer, I specialize in full-stack development using React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, Supabase, and cloud deployment workflows. From SaaS startups and e-commerce brands to internal business platforms and enterprise dashboards, I deliver scalable, maintainable, and performance-optimized solutions as a Full Stack Developer. Services I Offer → Full Stack Web Application Development → Full Stack Development using React, Next.js & Node.js → Front End Development with TypeScript, Tailwind CSS, HTML5 & CSS3 → Back End Development using Node.js, Express.js, NestJS & Python → Responsive Web Applications & Modern UI Development → Scalable SaaS Platforms & Custom Business Applications → Performance Optimization & Clean Maintainable Code → Real Time Features using WebSockets & Event-Driven Systems → React Full Stack Developer Solutions for Startups & Businesses API Development & Backend Systems → REST API & GraphQL API Development → Third Party API Integration & Webhook Systems → Authentication Systems with JWT, OAuth & Role-Based Access Control → PostgreSQL, MongoDB, MySQL & Supabase Database Architecture → FastAPI & Backend Service Development → Secure Backend Systems & Web Application Security → API Documentation, Testing & Optimization → Full Stack Developer Expertise for Scalable API Architecture * Cloud Deployment & Business Automation → AWS, Azure, GCP & Vercel Deployment → Docker, CI/CD Pipelines & Production Deployment Workflows → Workflow Automation with n8n, Make & Zapier → CRM Integrations with Airtable, HubSpot, Notion & GoHighLevel → Data Processing, CSV/PDF Parsing & Backend Automation → Monitoring, Error Handling & Scalable Infrastructure → Ongoing Maintenance, Troubleshooting & Long-Term Support → React Full Stack Developer Support for Cloud-Based Applications My Process * Discovery I start by understanding your business goals, workflow requirements, technical challenges, and project scope to ensure the right architecture and development approach as a React Full Stack Developer. * Build I design and develop scalable full-stack applications with clean code, regular progress updates, API integrations, testing, and performance optimization throughout the development process as a Full Stack Developer. * Handover You receive production-ready code, deployment support, documentation, testing, and post-launch support to ensure smooth operation after delivery. What Clients Will Get * Scalable Full-Stack Web Applications & SaaS Platforms • Modern Responsive Frontends with Clean UI/UX • Secure APIs, Database Architecture & Cloud Deployment • Performance-Optimized & Maintainable Code • Reliable Communication, Fast Delivery & Long-Term Support Tools / Skills / Tech Stack * Frontend Development React, Next.js, TypeScript, JavaScript, Tailwind CSS, HTML5, CSS3, Angular * Backend Development Node.js, Express.js, NestJS, Python, FastAPI, PHP * Databases & APIs PostgreSQL, MongoDB, MySQL, Supabase, REST API, GraphQL, Webhooks * Cloud & DevOps AWS, Azure, GCP, Docker, CI/CD, Vercel Why Clients Choose Me * Strong Experience Building Scalable SaaS & Web Applications as a Full Stack Developer * Clean, Maintainable & Performance-Optimized Code * Reliable Communication & Fast Turnaround * End-to-End Development from Architecture to Deployment * Long-Term Collaboration, Maintenance & Support * Proven Track Record as a React Full Stack Developer Call To Action Ready to build your web application, SaaS platform, API system, or scalable full-stack solution with a React Full Stack Developer? Send me your project details. I respond quickly and can help you plan, develop, and launch production-ready applications efficiently as a Full Stack Developer.

I build and stabilize AI automation, agents, and full stack SaaS products that need to work reliably in production, not just in demos. I’ve shipped and scaled systems for founders from Y Combinator, Founders Factory, FutureLabs, and Republic of Work. Founders I’ve built with have gone on to raise €2M+, and my AWS/serverless work ranks in the top 0.2% for DevOps. A few results: ⚡ Multi-tenant SaaS with 28% faster integrations ⚡ Serverless system running under 200ms latency at 10K+ users ⚡ AI RAG system improving support efficiency by 45% ⚡ Next.js migration reducing hosting costs by 15% ⚡ SaaS MVPs shipped to production, with founders raising after launch A lot of products today get built quickly with Cursor, Lovable, Bolt, Claude Code, or an early freelance team. Then real users arrive. That’s when the problems show up: messy code, fragile backends, AI features that worked in the demo but fail in production, scaling bottlenecks, unreliable automations, and rising AWS costs. I help turn that into a production-ready system with clean architecture, a solid backend, reliable AI behavior, and room to scale. I also build new products properly from idea to MVP to production. What I can help with: * AI agents, chatbots, and AI voice agents * Workflow automation and business process automation using n8n, Make, Zapier, and APIs * Production RAG, LLM, and knowledge-based systems * Full-stack SaaS development with Next.js, React, Node.js, TypeScript, JavaScript, and Python * Backend systems, REST APIs, third-party integrations, and multi-tenant architecture * PostgreSQL, Supabase, Stripe, AWS, serverless, performance, and cost optimization * Stabilizing fragile or AI-built MVPs before they become technical debt How I work: We can start small. Send me your app URL, repo, or brief with a short note on the problem. I’ll review the likely bottlenecks, scaling risks, reliability issues, and what I would fix first before you commit to anything bigger. From there, I can take technical ownership of the build: architecture, backend, integrations, AI systems, delivery, and the parts that usually stall. I work best with: * Funded startups starting with or moving beyond MVP * SaaS teams hitting scaling, reliability, or cost issues * Founders who want a senior engineer to take ownership, not just ship tickets I’m probably not the right fit if you’re looking for the cheapest possible build. I’m a fit when the product matters, users depend on it, and it has to work. Tech I work with often: Python, JavaScript, TypeScript, React, Next.js, Node.js, AWS, Supabase, PostgreSQL, Stripe, serverless, OpenAI, Claude, Gemini, RAG, LangChain, AI agents, n8n, Make, Zapier, automation, and APIs. If your product was built fast and now needs to work properly, or you want it built right from the start, send me the repo, app, or brief, and I’ll tell you what I’d fix first.

I build reliability-focused backend systems, developer tools, and scalable SaaS applications for startups and product teams that care about correctness, performance, and long-term maintainability. 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐡𝐢𝐫𝐞 𝐦𝐞 𝐰𝐡𝐞𝐧 𝐭𝐡𝐞𝐲 𝐧𝐞𝐞𝐝 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐣𝐮𝐬𝐭 𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬.They need systems that are predictable, testable, and resilient under real-world conditions, not something that breaks as complexity grows. I specialize in turning complex ideas into clean architectures and production-ready systems, with a strong focus on data integrity, edge cases, and sustainable scaling. 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫 𝑩𝒂𝒄𝒌𝒆𝒏𝒅 𝑺𝒚𝒔𝒕𝒆𝒎𝒔 & 𝑨𝑷𝑰𝒔 Production-grade REST & GraphQL APIs Secure, scalable server-side logic Database design & optimization (PostgreSQL, MySQL, MongoDB) Performance tuning and reliability under load 𝑫𝒆𝒗𝒆𝒍𝒐𝒑𝒆𝒓 𝑻𝒐𝒐𝒍𝒔, 𝑪𝑳𝑰 & 𝑫𝒂𝒕𝒂 𝑷𝒓𝒐𝒄𝒆𝒔𝒔𝒊𝒏𝒈 Python CLI tools for automation and internal workflows JSON / JSONL log parsing and transformation pipelines Git-based workflows (diff analysis, validation, automation) Deterministic systems with strong pytest coverage Focus on correctness, reproducibility, and edge-case handling 𝑭𝒖𝒍𝒍-𝑺𝒕𝒂𝒄𝒌 𝑺𝒂𝒂𝑺 𝑫𝒆𝒗𝒆𝒍𝒐𝒑𝒎𝒆𝒏𝒕 SaaS platforms, MVPs, and internal tools React / Next.js / TypeScript frontends Clean, scalable architecture for long-term growth Fast iteration without sacrificing code quality 𝑪𝒍𝒐𝒖𝒅, 𝑨𝒖𝒕𝒐𝒎𝒂𝒕𝒊𝒐𝒏 & 𝑰𝒏𝒕𝒆𝒈𝒓𝒂𝒕𝒊𝒐𝒏𝒔 AWS deployments (EC2, S3) CI/CD pipelines and automated workflows Third-party integrations (Stripe, PayPal, Twilio, Auth0, Firebase) Systems designed for smooth releases and stability 𝑳𝒆𝒈𝒂𝒄𝒚 𝑺𝒚𝒔𝒕𝒆𝒎 𝑺𝒕𝒂𝒃𝒊𝒍𝒊𝒛𝒂𝒕𝒊𝒐𝒏 Refactor and modernize existing Django, Rails, or Node apps Improve performance without breaking production Bring structure to under-documented or fragile systems 𝐏𝐫𝐨𝐯𝐞𝐧 𝐈𝐦𝐩𝐚𝐜𝐭 Built and maintained SaaS platforms used by thousands of users Designed APIs handling high-traffic, data-heavy workloads Improved performance of slow dashboards and backend services Helped founders launch MVPs quickly with clean, extensible codebases Took over unstable projects and turned them into reliable systems 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 Most systems fail due to: Hidden complexity and unclear architecture Fragile logic that breaks on edge cases Short-term decisions that create long-term debt 𝐈 𝐟𝐨𝐜𝐮𝐬 𝐨𝐧: Clarity over complexity Deterministic, testable systems Maintainability from day one Predictable delivery without surprises You get a system your team can understand, extend, and trust. 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞 5+ years building SaaS products and backend systems Strong engineering mindset with focus on reliability and correctness Clean, well-documented code designed for long-term use Clear communication and structured progress updates Ownership and accountability from start to finish 𝐈𝐝𝐞𝐚𝐥 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 SaaS platforms (early-stage to scaling) Backend-heavy or data-intensive applications Developer tools, automation systems, or CLI tools Projects that require stability, clarity, and long-term thinking If you’re looking for an engineer who brings structure, reliability, and technical clarity to your product, let’s talk. Share your idea or current challenges, and I’ll outline a clear, practical path forward.

I’m a backend developer with 7+ years of experience building scalable, high-performance applications using Node.js, including frameworks like Express and NestJS, along with modern backend technologies. I specialize in writing clean, maintainable, and optimized code, solving complex challenges, and designing robust system architectures tailored for startups and growing businesses. I'm passionate about building microservices, integrating cloud-native solutions, and continuously learning better ways to ship reliable backend systems. I've worked with startups, SaaS platforms, and e-commerce teams to launch reliable REST APIs, optimize backend performance, and scale infrastructure cost-effectively across modern cloud environments. ✅ Core Skills & Technologies: 1. Languages: TypeScript, JavaScript, Go (Golang), Python, Java 2. Node.js Frameworks: Express.js, NestJS 3. Databases: MongoDB (Mongoose), PostgreSQL, MySQL, Prisma, TypeORM 4. Caching & Messaging: Redis, Message Brokers (e.g., RabbitMQ, Kafka) 5. Architecture: Microservices, REST APIs, System Design, SOLID principles, OOP 6. Cloud & DevOps: AWS (EC2, S3, Lambda), GCP, Docker, Deployment pipelines 7. Testing: Unit & Integration Testing Whether you're building a new SaaS product, integrating a payment system, or scaling your backend, I bring a strong foundation in backend engineering and a drive to deliver clean, efficient, and scalable solutions. Ready to help you bring your product to life — let’s build something great together. 🚀

I’m a pragmatic full-stack developer with 5+ years of experience specializing in Python (Django, Flask), React, and production REST APIs. I ship reliable, scalable web apps and backend systems with clean PostgreSQL designs and repeatable deployment processes. I’ve led releases, implemented CI/CD workflows, and designed optimized PostgreSQL schemas for high-read systems. Recent contract work involved debugging large Django codebases, building APIs for dashboards, and delivering frontends for Elixir/Phoenix projects. I prioritize clean architecture, automated tests, and clear communication so you get reliable code and predictable delivery. My approach is API-first, testable, and focused on user experiences and robust functionality. My Full Tech Stack (high level) Frontend: React (hooks, component libraries), JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, Bootstrap, SASS, responsive design. Backend: Python (Django, Flask, FastAPI) Elixir / Phoenix; RESTful API design, JWT/OAuth auth, WebSockets. Node.js, Express.js, PHP, Laravel. GraphQL, microservices, authentication systems Data & infra: PostgreSQL (schema design, indexing, migrations), MySQL, SQL performance tuning, ETL & data extraction scripts, Docker, CI/CD. AWS, Vercel, Render, Heroku RESULTS I DELIVERED As a Django expert, I supported a large production platform (Founders Network) for ~948 hours, resolving critical bugs, shipping system upgrades, and maintaining a 5.0 client rating. As an API & Backend expert, I built and shipped core APIs and backend workflows for apprent.com, taskeen.sa, and dietcity.sa, delivering secure subscription and booking flows, reliable background jobs, and maintainable, well-documented endpoints. As an Elixir / Phoenix & Frontend expert, I delivered UI work ahead of schedule for a Phoenix project. Clients praised my responsiveness and clarity in communication. If you want a partner to take your project from spec to production, audit and stabilize an existing system, or build a fast MVP, Let's Connect! Keywords: Full Stack Developer, Web Developer, MERN Stack Developer, MEAN Stack Developer, JavaScript Developer, React.js Developer, Node.js Developer, Next.js Developer, Angular Developer, Vue.js Developer, PHP Developer, Laravel Developer, Python Developer, Django Developer, API Development, REST API, GraphQL, MongoDB Developer, MySQL Developer, PostgreSQL Developer, AWS Developer, Cloud Developer, Frontend Developer, Backend Developer, Software Engineer, E-commerce Website Development, SaaS Developer

🚀 𝗡𝗲𝗲𝗱 𝗮 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱, 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻, 𝗼𝗿 𝗦𝗮𝗮𝗦 𝗠𝗩𝗣 𝗯𝘂𝗶𝗹𝘁 𝗾𝘂𝗶𝗰𝗸𝗹𝘆 𝗮𝗻𝗱 𝗰𝗼𝗿𝗿𝗲𝗰𝘁𝗹𝘆? I help startups and businesses build 𝗠𝗩𝗣𝘀, 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗔𝗣𝗜𝘀, 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀, 𝗮𝗻𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗦𝗮𝗮𝗦 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 using Python, FastAPI, Django, and modern cloud technologies. Whether you're validating a new idea, launching a new product, or scaling an existing platform, I deliver reliable backend systems designed for performance, maintainability, and long-term growth. From MVP to enterprise-grade solutions, I focus on building clean, scalable architectures that help businesses launch faster and grow confidently. 🏆 Top Rated Plus Freelancer 🏆 100% Job Success Score 🏆 2,367+ Hours Successfully Delivered 🏆 Long-Term Partnerships with Startups & Businesses Worldwide 👉 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 and let's discuss the right technical approach for your project. 📊 𝐖𝐇𝐀𝐓 𝐈'𝐕𝐄 𝐃𝐄𝐋𝐈𝐕𝐄𝐑𝐄𝐃 (𝐒𝐨𝐜𝐢𝐚𝐥 𝐏𝐫𝐨𝐨𝐟 + 𝐒𝐩𝐞𝐜𝐢𝐟𝐢𝐜𝐢𝐭𝐲) 🏦 Financial Data Warehouse → Aggregated 30,000+ time-series into live dashboards for US fintech (reducing query time 65%) 🏘️ Real Estate Platform → Scraped, indexed, and tracked 100M+ property objects at scale (zero downtime, 99.9% uptime) 🔒 Web Application Firewall → Built scalable WAF for Chicago-based company (slashed infrastructure costs 40%) 🏨 Multi-Tenant SaaS Platform → Designed and delivered a scalable property management platform supporting multiple organizations and role-based access control 💡 𝐇𝐎𝐖 𝐈 𝐖𝐎𝐑𝐊 (𝐏𝐫𝐨𝐜𝐞𝐬𝐬 + 𝐂𝐥𝐚𝐫𝐢𝐭𝐲) 1. Discovery: Understand your business goals, requirements, and success metrics (free 30-min consultation) 2. Technical Design: Define the architecture, tech stack, timeline and roadmap aligned to your budget 3. Iterative Delivery: Bi-weekly sprints, clear progress, responsive communication 4. Production Ready: Testing, monitoring, documentation, deployment, and support. 5. Long-Term Partnership: Available for support, maintenance, scaling, or next phases 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐚𝐛𝐥𝐞𝐬 𝐀𝐥𝐰𝐚𝐲𝐬 𝐈𝐧𝐜𝐥𝐮𝐝𝐞: ✅ Clean, maintainable, production-ready code ✅ API documentation & deployment guides ✅ CI/CD pipelines (GitLab/GitHub Actions) ✅ Database design & migration strategy ✅ Performance monitoring and optimization 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Python · FastAPI · Django · Flask · Sanic 𝗔𝗣𝗜𝘀 & 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: RESTful APIs · Google APIs · Payment Gateways (Stripe, PayPal) 𝗪𝗲𝗯 𝗦𝗰𝗿𝗮𝗽𝗶𝗻𝗴 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Scrapy · Playwright · Selenium · BeautifulSoup 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL · MySQL · MongoDB · Redis · SQLite 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: Docker (4+ yrs) · AWS (EC2, S3, Lambda) · GCP · Heroku · Kubernetes · Vercel · CI/CD (GitLab CI) · GitHub · Bitbucket 𝗔𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: OpenAI • RAG Systems • Vector Databases • AI Agents • Claude Code • Cursor 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ✅ API ,API Integrations, Webhooks, integrating 3rd party API ✅ AI, RAG , OpenAI and Vector Databases ✅ Python FastAPI, Flask ✅ Django, Django Rest Framework, DRF, Django-channels ✅ MySQL, PostgreSQL, NoSQL, MongoDB, Graph Database ✅ Claude Code, Cursor Agentic way of building features & testing ✅ Scalable Deployment and Management ✅ Postman, Docker, API Management ✅ Testing ✅ Rapid MVP development to validate and launch faster ✅ Legacy system modernization to modern Python stacks ✅ Data-heavy applications with strong, scalable backends ⭐ 𝗪𝗵𝗮𝘁 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗦𝗮𝘆 "Hardeep is extremely professional, efficient and quick. He has been a pleasure to work with and we look forward to working with him again in the near future. Highly recommended." 🚀 𝐑𝐞𝐚𝐝𝐲 𝐭𝐨 𝐋𝐚𝐮𝐧𝐜𝐡 𝐨𝐫 𝐒𝐜𝐚𝐥𝐞 𝐘𝐨𝐮𝐫 𝐏𝐫𝐨𝐝𝐮𝐜𝐭? Whether you need a FastAPI backend, AI-powered application, SaaS platform, API integration, or startup MVP, I can help turn your requirements into a production-ready solution. 💬 Send me a message with your project requirements, and I'll provide feedback on scope, timeline, and the best technical approach. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬 𝐭𝐨 𝐅𝐢𝐧𝐝 𝐦𝐞: Python Backend Developer • FastAPI Developer • Django Developer • REST API Development • API Integrations • SaaS Development • Backend Engineering • Microservices Architecture • OpenAI Integration • RAG Applications • AI Agents • Web Scraping • Data Engineering • AWS • Docker • Kubernetes • PostgreSQL • MongoDB • Scalable Backend Systems • High-Performance APIs • Multi-Tenant SaaS Platforms

Need a senior architect who designs business-focused solutions and handles backend AI pipelines, RAG, or complex ETL at scale? Whether Python, Node.js, Go, or many others, I've shipped production systems for 16+ years, including: HIPAA-compliant platforms, identity infrastructure, and LLM-powered APIs on AWS. What sets me apart: behind my backend specialization, speed, quality, and cost stay balanced because you see every trade-off and make the call with me. I don't just wire up an API. I architect the data flow, own the cloud infrastructure, and handle complex auth (OAuth2, OIDC, SAML),so you don't need to manage different contractors. With Top Rated Plus status and $150K+ earned across 7 active contracts, my clients keep coming back for two simple reasons: I communicate clearly, and I ship on time. 🐍 Python backends — FastAPI, Flask, Django, async workers, parallelism ⚡ Node.js / TypeScript APIs — Express.js, Nest.js, REST, GraphQL, Supabase integrations 🐹 Golang services — high-performance APIs, concurrency, microservices 🤖 AI & RAG pipelines — LLM orchestration, vector search, embedding workflows 📊 ETL & data engineering — GCP BigQuery, PostgreSQL, MongoDB, Kafka, RabbitMQ, SQS ☁️ Cloud & DevOps — AWS (Lambda, EC2, S3, Step Functions), GCP, Docker, Kubernetes, Helm 🔐 Identity & Auth — OAuth2, OIDC, SAML, OpenID Connect 🌐 Full-stack when needed — React.js, Next.js, Redux, Vue.js ✅ Top Rated Plus on Upwork — top 3% of talent ✅ 16+ years of software development experience ✅ Led HIPAA-compliant mental health platform as sole technical owner (Node.js + AWS) ✅ Redesigned inbound identity module of Gluu, open-source IAM platform (SAML → OpenID Connect proxy) ✅ Certified: Programming with Google Go (UC Irvine) | Cloud Native Dev with Node.js, Docker & Kubernetes ✅ Acted as Product Lead and CTO — I understand business context, not just code Send me a message with what you're trying to build or fix — a single sentence is enough to start. I'll tell you how I'd approach it and the trade-offs to expect, so you can evaluate the fit before we scope anything. Detailed spec or just a rough idea, send it over.

Shopify Developer specializing in AI apps, conversion optimization, and custom backend systems. If you're looking for a Shopify developer who can actually increase conversion and build AI-powered systems, you're in the right place. ⭐ Top Rated Plus with $300K+ earned, 200+ projects, and a 100% Job Success Score. I’ve built Shopify apps, AI tools, and backend systems used by brands with millions of customers. RESULTS I’VE DELIVERED +20% conversion lift using AI product recommendation systems Mobile PageSpeed from 35 to 90+ (LCP reduced from 8s to under 2s) Shopify apps approved on the public App Store Automated workflows saving hours of manual work WHAT I CAN BUILD FOR YOUR STORE AI + SHOPIFY SYSTEMS AI chatbots and product recommendation engines AI-powered product finders and personalization systems FastAPI + LLM integrations connected to Shopify APIs WhatsApp automation and notification systems CUSTOM SHOPIFY DEVELOPMENT Shopify apps (public and private) Custom themes using Liquid Advanced API integrations (Admin API, Storefront API, GraphQL) SCALING & ADVANCED SETUPS Headless commerce (Hydrogen + Next.js) Shopify Plus migrations and cross-domain setups Subscription systems and B2B wholesale portals WooCommerce and Magento to Shopify migrations with SEO preservation WHY CLIENTS HIRE ME Most Shopify developers use AI tools. I build them. I don’t just develop stores. I build systems that increase conversion, automate operations, and scale with your business. I also run my own e-commerce products, so I understand what actually drives revenue, not just code. TECH STACK Shopify, Liquid, Hydrogen, GraphQL, Storefront API, Admin API Python, FastAPI, Django, Node.js, React, Next.js Postgres, MongoDB, AWS, DigitalOcean LET’S TALK Send me your project details, timeline, and budget. I’ll review everything and reply with a clear plan, not a generic response. Karan

🏆 TOP-RATED PLUS (TOP 3% on Upwork) | 💭 Looking for a tech partner to bring your vision to life? Whether you're launching a startup, scaling an existing business, or pivoting your current venture - I help companies succeed as an Full Stack Developer with strong full-stack and cloud architecture expertise. I help turn prototypes built with Lovable, Base44, or Bolt.new into properly designed, production-ready products and MVPs - scalable, maintainable, and cost-effective. As an Full Stack Developer, I specialize in designing, building, and scaling reliable systems on AWS that power modern web and AI-driven applications. 🔍 What I Can Help You With: 🚀 MVP Development: As an Full Stack Developer, I build MVPs fast using scalable AWS services so you can validate ideas and monetize quickly. 🚀 Full-Stack & AWS Backend Development: End-to-end solutions led by an Full Stack Developer, combining robust back-end systems with modern front ends. 🚀 Custom Cloud Solutions: Thoughtfully designed AWS architectures crafted by an AWS Backend Developer to be cost-effective from day one and scale seamlessly with growth. 🚀 AI-Powered Tools: I integrate AI solutions into AWS-native back ends, leveraging my experience as an AWS Backend Developer. 🚀 Reliable Data Pipelines: Event-driven, serverless pipelines designed by an AWS Backend Developer for real-time, high-volume data processing. 🚀 Technical Leadership: As a senior AWS Backend Developer, I provide end-to-end guidance from architecture design to stable production operations. 👨‍💻 Tech I Work With: 💻 Backend / Frontend / Full-Stack Development (AWS-focused): ✔️ Python (Django / Flask / FastAPI) / Node.js / NestJS / Express.js ✔️ PostgreSQL / MongoDB ✔️ React / Next.js / JavaScript / TypeScript ✔️ HTML / CSS / Tailwind / MUI / Ant Design / shadcn/ui 🧠 AI & Machine Learning: ✔️ AWS Bedrock / LangChain / LangGraph / CrewAI / Hugging Face ✔️ Chatbot / AI Assistant / Agentic Applications / CopilotKit / AG-UI ✔️ Amazon Transcribe / Polly / Comprehend ✔️ RAG, Ragie.ai, Vector databases (Pinecone, Weaviate, Chroma, AWS OpenSearch, Supabase Vector Store) ✔️ OpenAI (GPT-5, GPT-4o, GPT-4o-mini, GPT-3, Realtime API, Whisper, TTS, DALL·E, Embeddings) ✔️ Anthropic Claude / Google Gemini / DeepSeek 🕸️ Web Scraping ✔️ Puppeteer / Selenium / Playwright ✔️ Crawlee / Apify / BrightData / Decodo / Oxylabs / SerpApi / ZenRows ☁️ AWS Cloud (Core Expertise of an AWS Backend Developer): ✔️ Serverless architectures, Lambda, Step Functions, API Gateway, S3, DynamoDB, SNS, SQS, and more 🚀 Infrastructure as Code & CI/CD: ✔️ AWS CDK / Terraform / Pulumi / Serverless Framework ✔️ GitHub Actions / GitLab CI/CD 🚀 Let’s Build Your Next Big Thing! 📊 As an Full Stack Developer with a decade of experience in software architecture and technical leadership, I design systems that are scalable, secure, and cost-efficient. If you’re looking for an Full Stack Developer who can own your infrastructure and backend end-to-end, you’re in the right place. 💼 Ready to partner? Message me today, and let’s get started!

I’m Vitalii, a Senior Full Stack Developer with 8+ years of experience building web applications, mobile apps, SaaS platforms, MVPs, and API-based systems for startups and growing businesses. 𝐅𝐞𝐞𝐥 𝐟𝐫𝐞𝐞 𝐭𝐨 𝐜𝐥𝐢𝐜𝐤 “𝐌𝐞𝐬𝐬𝐚𝐠𝐞” - 𝐈’𝐥𝐥 𝐫𝐞𝐬𝐩𝐨𝐧𝐝 𝐪𝐮𝐢𝐜𝐤𝐥𝐲. 𝐎𝐫 𝐡𝐢𝐭 "𝐭𝐡𝐫𝐞𝐞 𝐝𝐨𝐭𝐬" 𝐚𝐧𝐝 𝐢𝐧𝐯𝐢𝐭𝐞 𝐦𝐞 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐣𝐨𝐛 𝐬𝐨 𝐈 𝐜𝐚𝐧 𝐩𝐫𝐨𝐯𝐢𝐝𝐞 𝐚𝐧 𝐞𝐬𝐭𝐢𝐦𝐚𝐭𝐞 𝐚𝐧𝐝 𝐚 𝐜𝐥𝐞𝐚𝐫 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐩𝐥𝐚𝐧. I help teams launch MVPs, improve existing systems and scale SaaS products without losing performance or stability. As a Full Stack developer I usually work on: • building MVPs from idea to production for web and mobile applications • building SaaS platforms, dashboards, admin panels, and API integrations • improving and refactoring slow or unstable frontend and backend systems • scaling backend and APIs under real production load • optimizing performance and user experience across web apps • taking ownership of features and systems end-to-end ✅ Track record on Upwork: • $200K+ total earnings • 7,900+ hours worked • 99% Job Success • Top Rated Plus Worked across SaaS platforms, marketplaces, mobile apps and internal tools, supporting both new product development and long-term system improvements. 🚀Selected work as a Full Stack developer: • Built a collective decision-making platform with identity verification and structured voting flows, helping users organize, align, and make decisions together in a transparent way. • Developed an AI-driven language learning app with guided lessons, reinforcement logic, and gamified features, helping users stay engaged and build consistent learning habits. My Full Stack developer working approach I build systems that work reliably in production and don’t need to be rebuilt as the product grows. 🚀 Clients value: • clear communication and predictable delivery • ownership from idea to release • ability to step into an existing codebase and move it forward • focus on real product outcomes 🚀Tech stack: • Frontend - React, Next.js, TypeScript, Tailwind CSS • Backend - Node.js, REST APIs, integrations, authentication • Mobile - React Native • Data & Infra - PostgreSQL, MongoDB, Firebase, Supabase • Integrations - Stripe, PayPal, third-party APIs I'm Full-Stack Developer, building scalable web applications, SaaS platforms, MVPs, admin panels, dashboards, marketplaces, CRM systems, and business automation tools for startups and growing companies. Core expertise: React developer, Node.js developer, frontend developer, backend developer, SaaS developer, web app developer, MVP developer, API developer, Next.js developer, TypeScript developer, REST API integration, database design, and cloud-based application development. If you need a Full Stack developer who can take ownership, keep systems stable and move your product forward - feel free to reach out. full stack developer, full stack web developer, python full stack developer, full stack developer ai, full stack developer react, full stack laravel, ai developer, wordpress developer, shopify developer, website developer, webflow developer, app developer, react developer.