A highly skilled and proficient Full Stack Developer with over 10 years of professional experience in designing and creating responsive and adaptive web applications. Experienced in leveraging HTML, CSS, PHP and JavaScript programming languages to drive design, build, test and deployment efforts for custom website solutions. Results-driven individual contributor with a successful track record in exceeding expectations for web development initiatives. • Over 8 years of experience in JavaScript technology like ReactJS, AngularJS/Angular, Express.js, MongoDB and NodeJS. • Experience building applications using JavaScript MEAN stack and MERN stack using Redux, Flux, Common.js, ExtJS and Web-Pack for Single Page Application Development. • Expertise in developing web pages using HTML5, CSS3, SASS, LESS, ES6, jQuery, AJAX, JSON and XML. • Expertise in creating user validation forms and using the RESTful services to send the data to the server. • Good knowledge on AWS Cloud formation templates and configured SQS service using API. • PHP Frameworks: Codeigniter,, Laravel, Symfony, Yii • Third Party Integration : Twillio, PayPal, Authorize.net, Amazon ( Payments, S3 ), UPS, USPS • Databases: MySQL, PostgreSQL, MongoDB • Version Control Systems: GIT, Bitbucket and SVN • Other Tools: Redis, MemCached • Operating Systems : Windows, Linux

✅ Top Rated | ✅ 10+ Years of Experience | ✅ 24x7 Availability I'm a Full-Stack MERN Developer with 10+ years of experience building modern, scalable, and high-performance web applications, eCommerce stores, and custom business solutions. My expertise includes React.js, Next.js, Redux, Redux Toolkit, Node.js, Express.js, MongoDB, REST APIs, Shopify, Shopify Liquid, WordPress, WooCommerce, Astro, HTML5, CSS3, JavaScript, Tailwind CSS, Bootstrap, SCSS/SASS, and jQuery. I specialize in developing responsive, user-friendly websites and web applications that are fast, secure, and optimized for performance. Whether it's building a custom MERN Stack application, integrating third-party APIs, developing Shopify themes, creating WordPress/WooCommerce websites, converting designs into pixel-perfect websites, or building modern frontend experiences with React, Next.js, Tailwind CSS, and Astro, I focus on delivering clean, maintainable, and scalable solutions. My core strengths include: ✔ MERN Stack Development (MongoDB, Express.js, React.js, Node.js) ✔ Redux & Redux Toolkit State Management ✔ REST API Development & Integration ✔ Next.js & Astro Development ✔ Shopify Theme Development & Customization ✔ WordPress & WooCommerce Development ✔ Responsive UI Development with Tailwind CSS & Bootstrap ✔ Performance Optimization & SEO Best Practices ✔ Pixel-Perfect Design Implementation ✔ E-commerce & Custom Web Solutions I am committed to delivering high-quality work, clear communication, and long-term value for every project. Thanks & Regards Sandeep Kumar

Hi 👋 I’m a Senior AI Full-Stack Engineer with 12+ years of experience building scalable SaaS platforms, AI-powered applications, workflow automation systems, and enterprise-grade web solutions. My expertise combines modern AI technologies (LLMs, AI agents, automation, RAG systems) with strong backend engineering using Laravel, Node.js, Java (Spring Boot), Supabase, and cloud-native architectures on AWS. I specialize in building intelligent systems that automate workflows, integrate with APIs, process documents, and scale reliably for real-world business operations. If you’re looking for an engineer who understands both modern AI systems and production-grade software architecture, let’s connect. 🏆 Credibility & Trust ✅ Top-Rated Plus Freelancer on Upwork ✅ 100% Job Success Score ✅ 2,500+ hours delivered as an individual developer ✅ Consistently near 5-star client feedback ✅ Long-term support & clear communication 🛠 Core Expertise • AI Agents & Workflow Automation • LLM Applications using OpenAI, Claude & Gemini APIs • RAG Systems & AI Knowledge Bases • MCP & AI Tool Integrations • Laravel, Node.js & NestJS Backend Development • Java (Spring Boot) APIs & Microservices • Python AI/ML Integrations • Supabase, Firebase & Real-Time Systems • REST APIs & Third-Party Integrations • AWS – EC2, RDS, S3, Lambda, CI/CD & scalable deployments • MySQL, PostgreSQL & Vector Databases • Secure authentication & role-based systems • Performance optimization & scalable architecture 🚀 Solutions I Build • AI-powered SaaS platforms • Workflow automation & AI agent systems • Event & marketplace platforms • Healthcare & business applications • ERP & admin dashboard systems • AI document processing pipelines • API-driven products & integrations • Multi-tenant enterprise applications • Real-time applications with Supabase & WebSockets 🔑 Working Style I build systems with a strong focus on scalability, maintainability, security, and long-term product stability. My approach combines clean architecture with practical AI implementation to create solutions that are reliable, fast, and ready to scale.

Engineering the Future of Digital Products: Where AI Meets Scalability. Hello! I’m Gaurang, a Senior Full-Stack Architect with over 11 years of experience in transforming complex business problems into high-performance digital solutions. With 𝟓𝟎𝟎+ successful launches, I specialize in building "𝐀𝐈-𝐅𝐢𝐫𝐬𝐭" products that don't just work; they lead the market. In 2026, a "good" app isn't enough. You need a system that is 𝐀𝐈-𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞𝐝, 𝐜𝐥𝐨𝐮𝐝-𝐧𝐚𝐭𝐢𝐯𝐞, 𝐚𝐧𝐝 𝐡𝐲𝐩𝐞𝐫-𝐫𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞. Whether you are a startup looking for an MVP or an enterprise modernizing a Legacy SaaS, I provide the technical vision and execution to get you there. ✅𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐄𝐥𝐞𝐯𝐚𝐭𝐞: I bring deep domain expertise to ensure your product meets industry-specific compliance and user expectations: ▫️𝐅𝐢𝐧𝐓𝐞𝐜𝐡 & 𝐍𝐞𝐨𝐛𝐚𝐧𝐤𝐢𝐧𝐠: Secure payment gateways, ledger systems, and fraud detection. ▫️𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 (𝐇𝐞𝐚𝐥𝐭𝐡𝐓𝐞𝐜𝐡): HIPAA-compliant apps, patient portals, and wearable integrations. ▫️𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 & 𝐑𝐞𝐭𝐚𝐢𝐥: High-traffic marketplaces, AI-driven recommendation engines. ▫️𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: Custom LLM integrations, autonomous agents, and workflow bots. ▫️𝐋𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬 & 𝐒𝐮𝐩𝐩𝐥𝐲 𝐂𝐡𝐚𝐢𝐧: Real-time tracking, fleet management, and IoT dashboards. ▫️𝐄𝐝𝐓𝐞𝐜𝐡: LMS platforms, interactive streaming, and gamified learning. ▫️𝐑𝐞𝐚𝐥 𝐄𝐬𝐭𝐚𝐭𝐞: PropTech solutions, 360° virtual tours, and CRM automation. ✅𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: 𝐌𝐨𝐛𝐢𝐥𝐞 𝐄𝐜𝐨𝐬𝐲𝐬𝐭𝐞𝐦 (𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 & 𝐍𝐚𝐭𝐢𝐯𝐞) ▫️𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Flutter, FlutterFlow, React Native. ▫️𝐍𝐚𝐭𝐢𝐯𝐞: Android (Kotlin), iOS (Swift). ▫️𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬: Biometrics, Geofencing, Offline-first sync, In-app purchases. 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐖𝐞𝐛 & 𝐒𝐚𝐚𝐒 ▫️𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React.js (Next.js), Vue.js, Tailwind CSS, TypeScript. ▫️𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js (Express/NestJS), PHP (Laravel), Python (Django/FastAPI). ▫️𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: Microservices, Serverless, Monolith-to-Cloud migrations. 𝐀𝐈 & 𝐈𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧𝐬 ▫️𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈: OpenAI (GPT-4o), Anthropic (Claude), Gemini integration. ▫️𝐋𝐋𝐌𝐎𝐩𝐬: Vector Databases (Pinecone, Weaviate), RAG (Retrieval-Augmented Generation). ▫️𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: Make. com, Zapier, Custom Python scripting. 𝐃𝐚𝐭𝐚 & 𝐂𝐥𝐨𝐮𝐝 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 ▫️𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: MongoDB, PostgreSQL, Firebase, MySQL, Redis. ▫️𝐃𝐞𝐯𝐎𝐩𝐬: AWS (EC2, S3, Lambda), Google Cloud, Docker, Kubernetes, CI/CD. ✅𝐅𝐫𝐨𝐦 ‘𝐖𝐡𝐚𝐭 𝐈𝐟’ 𝐭𝐨 ‘𝐈 𝐃𝐢𝐝 𝐈𝐭': ▫️𝟓-𝐒𝐭𝐚𝐫 𝐓𝐫𝐚𝐜𝐤 𝐑𝐞𝐜𝐨𝐫𝐝: A decade of "100% Satisfied" feedback from global clients. ▫️𝐒𝐭𝐫𝐚𝐭𝐞𝐠𝐲 + 𝐂𝐨𝐝𝐞: I don’t just write code; I advise on user retention and technical ROI. ▫️𝐒𝐩𝐞𝐞𝐝 𝐭𝐨 𝐌𝐚𝐫𝐤𝐞𝐭: Expert in "Scrappy" MVP development to get you to your first round of funding or first 1000 users fast. ▫️𝐂𝐥𝐞𝐚𝐧 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: My code is modular, documented, and built to be handed off to a 50-person team later. ▫️𝐀𝐠𝐢𝐥𝐞 𝐏𝐚𝐫𝐭𝐧𝐞𝐫𝐬𝐡𝐢𝐩: Daily updates via Slack/Jira, weekly demos, and transparent Loom walkthroughs. ✅High-Value Services: ▫️𝐌𝐕𝐏 𝐟𝐨𝐫 𝐒𝐭𝐚𝐫𝐭𝐮𝐩𝐬: From Figma design to a live, scalable product in weeks. ▫️𝐋𝐞𝐠𝐚𝐜𝐲 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧: Refactoring old PHP/Java systems into modern MERN/Cloud stacks. ▫️𝐀𝐈 𝐅𝐞𝐚𝐭𝐮𝐫𝐞 𝐈𝐧𝐣𝐞𝐜𝐭𝐢𝐨𝐧: Adding smart search, chatbots, or predictive analytics to existing apps. ▫️𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐌𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞: Ongoing support, security patches, and performance optimization. Ready to build something legendary? The digital landscape moves fast. Let's make sure your project is built to last. Click the "Hire" or "Message" button to schedule a 15-minute discovery call. Let’s turn your vision into a high-revenue reality!

Technical Expertise: WordPress, Magento 2, Laravel, Custom Web CMS, Shopify, UI/UX, jQuery, AJAX, JavaScript, CSS, HTML, HTML5, Next, React Native, API Development, MySQL Intermediate Technical Skills: React, GraphQL, MERN, MEAN, Python, Vue, AWS, AWS SES, S3, Socket, Redis, Varnish, Firebase Artificial Intelligence: ChatGTP-4, OpenAI Design: Figma, UI/UX Web Development: Ecommerce Website Development, CMS Website Development, Business Website Development, Responsive Design, Web Service (REST API), Google Structure Data, On-Site & Off-Site SEO, Certified Magento 2 & WordPress Developer, Shopify Mobile Development: Native iOS (Swift, Swift UI), Native Android (Kotlin), Flutter, React Native Code Management Tools: GIT, Jira, Trello, Shakebug, BitBucket, DevOps, Docker 👋 Hi Mate! I'm your go-to tech enthusiast 🚀 with a versatile skillset that bridges the gap between innovation and security. 👨‍💻 ✅ 11+ Years of Experience ✅ 1000+ hours of service ✅ TOP RATED Freelancer ✅ 100% Job Success On the frontend, I wield the magic of WordPress, Magento, Laravel, and App to craft captivating user experiences that engage and delight. My backend expertise weaves the fabric of seamless functionality for both Website 🌐 and Mobile 📱 But wait, there's more! 🌟 I'm excited to announce that I'm among the TOP 5% of Upwork's successful freelancers having a Top Rated badge.🏆 I don't just work; I architect experiences, fortify security, and bring ideas to life with a sprinkle of innovation. Let's collaborate and turn your projects into tech-powered masterpieces! 🔍🔒🌟

Senior Solution Architect with 13+ years delivering enterprise Microsoft 365, SharePoint, Power Platform, and AI-powered systems. 100% Job Success Score. $50K+ earned on Upwork. I spent 6 years onsite in the USA as Enterprise Architect working with Fortune 500 clients through Accenture's Avanade unit — Cardinal Health, Barclays, Grant Thornton. Prior to that I spent 8.5 years as Lead Architect at a US-based healthcare MNC (Somerset, NJ) building enterprise platforms across North America, Europe, Japan, and Australia. I've conducted Microsoft 365 and SharePoint workshops across 40+ countries. One of my intranet builds was nominated by the client for an IABC award for best implementation in Atlanta, USA. I currently manage concurrent client projects at SwiftinIT across healthcare, construction, legal, and professional services clients globally, and am building a production multi-tenant healthcare AI platform using Node.js. What I deliver: Microsoft 365 & SharePoint — SPFx custom web parts (React/TypeScript), hub site architecture, document management, permissions, governance, and migrations from SharePoint 2010/2013/2016 to modern SPO. Power Platform — Power Apps canvas and model-driven apps, Power Automate complex approval flows with error handling and audit logging, Power BI dashboards, Copilot Studio agents. AI & Automation — Claude API, Azure OpenAI, Mistral agents, RAG pipelines, AI Builder document processing, HIPAA-compliant healthcare AI workflows. I use Claude Code, Cursor, and GitHub Copilot daily. Full Stack — React, Next.js, Node.js, ASP.NET Core, C#, PostgreSQL, SQL Server, Azure, AWS. Healthcare AI — medical imaging analysis, clinical documentation automation, FHIR R4 integrations, multi-tenant SaaS architecture. Certifications: Microsoft 365 Certified | TOGAF 9 Foundation | Cornell University | Microsoft Certified Professional

I build AI automation and integrations for startups and growing businesses. Voice agents, AI-powered workflows, and API integrations that actually run in production, backed by a full-stack engineering base when a project needs the whole thing built, not just wired together. Most of my work now connects AI into real products. Retell voice agents, OpenAI and Claude API integrations, RAG systems, and end-to-end automation with Make and n8n. I built the automation behind Tranflo, an AI voice agent for restaurants that ties Retell, OpenAI, Twilio and POS systems together, so this is shipped work, not theory. When a build needs a backend, dashboard, or full app around the automation, I cover that too. PHP/Laravel and Node/MERN, Vue and Angular on the front end, MySQL and MongoDB, Firebase and Supabase, Stripe and PayPal. Custom dashboards, multi-vendor eCommerce, and Chrome extensions when the job calls for it. I'm comfortable joining an existing team or working with other freelancers, I'm flexible on hours, and I write code meant to run in production. If you want someone who understands the business side as well as the build, message me and tell me what you're working on.

Senior Full-Stack Developer | .NET + React Specialist Built full-stack web applications for healthcare, fintech, and SaaS clients. Work with teams that need someone who can handle both architecture and hands-on coding without constant hand-holding. Recent Projects: Healthcare clinic management system — Patient scheduling, EHR integration, HIPAA-compliant messaging. PostgreSQL + .NET Core backend, React frontend. 3 clinics live, handling 200+ appointments/day. Fintech payment platform — Multi-currency transactions, Stripe integration, automated reconciliation. Handles $50K+ daily volume. Built with .NET microservices + Next.js. SaaS marketplace — Multi-tenant architecture, role-based access, usage-based billing. MongoDB + .NET backend, React frontend. 2,000+ active users. What I Build: Full-stack applications where backend and frontend actually work together. API design, database architecture, user authentication, payment integrations, third-party APIs, deployment pipelines. Not interested in small fixes or WordPress tweaks. Best fit for projects $5K+ that need 2-6 months of focused work. Tech Stack: Backend: .NET Core, C#, ASP.NET, Node.js, Entity Framework Frontend: React, Next.js, TypeScript, Angular Databases: SQL Server, PostgreSQL, MongoDB Cloud: Azure, AWS (deployment, CI/CD, monitoring) Integrations: Stripe, Twilio, QuickBooks, SendGrid, Google APIs Domains with Real Experience: Healthcare: HIPAA compliance, patient portals, appointment systems, EHR integrations Fintech: Payment processing, PCI compliance, transaction reconciliation SaaS: Multi-tenancy, subscription billing, role-based access E-commerce: Inventory management, order processing, shipping integrations How I Work: Available 30+ hours/week. Overlap with US timezones (EST/PST). Daily updates via Slack/email. Code reviews before merging. No surprises mid-project. Work through Step2gen Technologies (70+ developer team, India-based). You get me as your dedicated developer plus backup support if needed. Looking for: Projects $5K-$50K range 2-6 month duration Clear requirements or willingness to define them together Clients who value getting it done right over getting it done cheap If you need someone to start this week and actually finish what they start, let's talk.

👋 Hi there! I'm a Full Stack Web & Mobile Developer with over 6 years of experience building high-quality applications using cutting-edge technologies. 💻 Tech Stack: Frontend: Next.js, React Native, Flutter Backend: Node.js, NestJS Databases: MongoDB, PostgreSQL 🚀 I’ve worked on various SaaS platforms, done complex API integrations, and contributed to UI/UX implementation and frontend-backend integration for enterprise-level solutions, including an auditing system for workplace incident tracking. ✅ Services I Offer: Full Web & Mobile App Development API Integration & Backend Architecture Cross-platform Mobile Development (Flutter & React Native) Scalable SaaS Platform Development Bug fixing, performance optimization, and code refactoring I'm passionate about clean code, great user experience, and long-term client collaboration. Let’s bring your idea to life — feel free to reach out anytim

**SharePoint, Dynamics 365 & Power Platform** - 10+ years of experience in SharePoint, Microsoft 365, and Power Platform - Specialist in Power Apps (Canvas and Model-Driven), Power Automate, and Power BI with focus on governance, data modeling, and security - Expertise in process automation, custom enterprise solutions, and Microsoft 365 integrations - SharePoint development across SSOM, CSOM, JSOM, REST API, and SharePoint PnP - PowerShell scripting for administration and automation - Delivered end-to-end solutions for clients from small businesses to global enterprises **.NET, Azure Cloud & DevOps** - 10+ years of experience in Azure Cloud architecture, .NET development, and DevOps - Strong background in Azure infrastructure design, Azure AD (Entra ID), and secure deployments - Azure Functions and Azure Logic Apps for serverless and workflow automation - Solution architecture for enterprise automation and cloud deployments - CI/CD pipelines, cloud migrations, and scalable production deployments ⭐Development Frameworks/Technologies: ✅ Front End development - React.js, Angular, Typescript, GraphQL, Asp.Net MVC ✅ Back End development - Asp.NET Core, Asp.NET API ✅ SharePoint 2013/2016/2019, SharePoint Framework (SPFx), Graph API, Office 365 ✅ Modern & Communication Site, MS Team, Branding ✅ Power Apps - Canvas & Model-Driven apps, PowerApps Components Framework ✅ Power Automate (MS Flow), Graph API ✅ DB - MySQL, MSSql, ✅ Cloud Infrastructure - AWS, Azure, Google Cloud ✅ GitHub, Jira, Bitbucket