Most AI SaaS products work well in demos but struggle under real-world usage. I build production-grade systems that scale reliably, handle edge cases, and meet the security and compliance requirements of regulated industries. My experience spans AI-powered SaaS platforms, agentic workflows, Retrieval-Augmented Generation (RAG), healthcare integrations, and fintech infrastructure. I've helped startups and growing companies turn ideas into stable products that users can depend on. What I Specialize In : - SaaS Application Development - MVP Development for Startups - Full-stack development from architecture to deployment - AI Agents, RAG systems, and LLM-powered applications - SaaS MVP development and scaling - Multi-tenant platforms with strong data isolation - Healthcare integrations (HL7, FHIR, HIPAA-aware systems) - Fintech platforms and compliance-focused infrastructure - Technical leadership and fractional CTO support - AI Integrations (OpenAI, LLMs, AI automation) - Laravel & Node.js Backend Architecture - React.js / Next.js Frontend Development - API Development & Third-Party Integrations - Workflow Automation (n8n, Zapier, Custom Automation) - Stripe & Subscription Systems - Cloud Deployment (AWS, DigitalOcean, Vercel) - Performance Optimization & Scalability Beyond Development : I don't just build what's requested, I help identify the most effective technical solution before development begins. With 5+ years of experience leading architecture decisions and supporting founders as a technical partner, I focus on balancing speed, scalability, and business goals. Proven Results : Healthcare Infrastructure : → Built an HL7 gateway for HealthMosaic, endorsed by the VP of Enterprise Solutions at Fukuda Denshi USA. → Processes 10,000+ clinical messages daily from 200+ hospital monitoring devices. → Achieved 99% message delivery reliability. → Contributed to an estimated $400K annual operational savings. Fintech Platform Development : → Developed a SEC Regulation CF-compliant backend for a U.S. fintech startup. → Delivered 248 automated tests with zero production defects at launch. → Designed secure, auditable infrastructure to support compliance requirements. Technologies : → Frontend: React, Next.js, TypeScript, Tailwind CSS → Backend: Node.js, Python, NestJS, FastAPI, Express → AI/LLMs: OpenAI, Claude, LangChain, LangGraph, RAG, Vector Databases, AI Agents → Databases: PostgreSQL, MongoDB, Redis → Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD → Healthcare & Compliance: HL7, FHIR, HIPAA-aware architectures, Audit Logging What Makes Me Different: - 265+ successful projects delivered - $300K+ earned on Upwork - 20,000+ working hours (long-term client trust) - Clean, scalable, production-ready code - Clear communication & fast response Industries I’ve Worked With : • SaaS Platforms • FinTech • EdTech • HealthTech • Marketplaces • CRM & Internal Systems • AI-powered Applications What clients say: "Best dev to work with on Upwork!!!" "I had a very good experience with Taj and his team. We worked on an early phase MVP that we were able to bring to life and I look forward to working with them again in the future." "Tajinder was great to work with. He is easy to communicate with and explains everything in clear, simple steps, which made the whole process smooth. He is transparent, honest, and puts in genuine hard effort. If you're building in AI, healthcare, fintech, or any SaaS where it has to work the first time, send me what you're building. You'll hear back within a day on whether I'm the right fit, and I'll tell you straight if I'm not. Let’s talk. Thanks, @Tajinder _ Full Stack Developer & AI Engineer | AI Agents, RAG, SaaS & Healthcare Systems Keywords : Tajinder senior full stack developer Upwork | Full-Stack AI Engineer | SaaS MVPs, AI Agents & OpenAI Integrations | AI SaaS Developer | Next.js, Node.js, OpenAI, MVP Development | RAG Pipelines | AI Agents | Supabase | LangChain | Full Stack Developer| Full Stack Expert | Full Stack Specialist | React Developer| Node.js Developer| MERN Stack Developer| Backend Developer| React.js | Node.js| Senior Full Stack Developer| Full Stack Specialist | Full Stack Developer| Full Stack Developer Full Stack Developer| React.js Full Stack Developer| Full Stack Developer| Full Stack Developer| Node Full Stack Developer| Node Full Stack Developer| Full Stack Developer| full stack developer| MERN Full Stack Developer| Saas Full Stack Developer| React Full Stack Developer| AWS Full Stack Developer| Full Stack| Full Stack Developer| React Full Stack | Node.js Backend | Full-Stack AI Engineer | Claude API / OpenAI API | AI Integration | SaaS MVP Development ~ LLM / OpenAI API Development ~ AI Chatbot Development Startup Developer | API Integration | Automation Expert | n8n Developer | OpenAI Integration | Web Application | Full Stack Developer | Full Stack| Mobile App Developer Hire best Full Stack Developer upwork for AI-Powered SaaS platform & MVP Development

⬜️ Full Stack Developer React Node helping SaaS products grow and scale ⬜️ React developer available for LONG-TERM partnerships ⬜️ Built 10+ SaaS products from idea to stable production ⬜️ No quick patches ❗️Focused on serious projects with long-term value I am a Full Stack Developer React Node who develop full stack applications using modern technologies like React, Next.js, Node.js, and Python. My focus is full stack developer react node on building stable, scalable SaaS platforms, business tools, and customer-facing senior web developer applications that work reliably under real-world usage. Who Am I? SaaS Developer ReactJS: ✔️ Full SaaS JavaScript products from idea to production ✔️ User authentication, dashboards, subscriptions, and admin panels ✔️ Multi-tenant systems and scalable backend architecture ✔️ Stripe and payment integrations Web Apps Full Stack Developer React Node: ✔️ Custom web platforms using React and Next.js ✔️ Complex senior python developer dashboards, internal tools, and client portals ✔️ Real-time features using WebSockets ✔️ API integrations with react native developer third-party services Front End React Developer: ✔️ Convert Figma and design files into clean, production-ready frontend code ✔️ Optimize front end developer react performance, loading speed, and overall user experience ✔️ Develop dashboards, SaaS interfaces, admin panels, and client-facing applications How I work? I focus on writing clean, maintainable code and ux designer backend systems that scale properly. My goal is mobile app developer to build applications that remain stable as user load grows and new features are added. I communicate clearly, meet deadlines react developer, and treat every project as a long-term product, not just a quick implementation. As a full stack developer react node, front end developer, and frontend react developer, I build: ✔️ SaaS dashboards ✔️ admin panels ✔️ complex interfaces ✔️ real-time data systems Using modern frameworks like react, react js, and javascript, combined with scalable backend architecture. Tech Stack Frontend ◾️ React ◾️ Next.js ◾️ React Native ◾️ TypeScript ◾️ Redux ◾️ React Query ◾️ Tailwind ◾️ MUI ◾️ MERN stack Backend ◾️ Node.js ◾️ NestJS ◾️ Express ◾️ Python ◾️ FastAPI ◾️ REST API ◾️ GraphQL ◾️ WebSockets Databases ◾️ PostgreSQL ◾️ MongoDB ◾️ Supabase ◾️ Firebase ◾️ Redis ◾️ MySQL Infrastructure ◾️ Docker ◾️ AWS ◾️ Vercel ◾️ GitHub Actions ◾️ Railway Focus I am a full stack developer react node ( software developer ) who focuses on modern, production-ready stacks and don’t take projects who need wordpress developer, project manager, saas marketing to built with Swift, Angular, Ruby on Rails, WordPress, Laravel vue, PHP, Vue, or Webflow, Seo keyword research, gps, flutter, link building, copywriter, website traffic, etsy marketing Click Invite and share a brief description of your project if you are looking for a full stack developer react node, mern stack developer, react developer, or saas developer to help build a serious long-term product.

Full stack developer with 10 years of experience | top 1% on Upwork ( Expert-Vetted ) I turn ideas into real applications your users can depend on Recent work: → Product Architect at Upwork, leading a team of 100+ engineers within Upwork's Engineering Talent Cloud → Led frontend for Autobound's AI sales automation platform - grew from a single-engineer startup to $4M raised and millions in revenue (Vue.js/Nuxt + Chrome extension + micro-frontends) → Built full stack for Augmento's AR/VR product - used by 1,000+ brands and 100K users across retail and real estate → Migrated DriverHRIS - 1,000+ screens from Vue 2/.NET to Vue 3 + Node.js microservices, with a 10x (1,000%) performance gain → Rebuilt Wawibox (German dental marketplace) - full Nuxt 2 → Nuxt 3 SSR → Nuxt 4 migration, 80% faster load time I also co-founded Softonix, a 25-engineer Vue.js | Node agency in Lviv - so if your project grows past one developer, I can scale the team without handing you off to strangers. Want to scope something? Let's talk - I usually reply within a hour 🚀 Keywords web developer, react developer, wordpress developer, mobile app developer, SQL, Software Design, Application Improvement, Software Development, Software Debugging, CSS, Software Consultation, Git, HTML, Back-End Development Framework, Full-Stack Development, Database Architecture, Agile Software Development, Node.js, Laravel, Bootstrap, Web Application, WordPress, Tailwind CSS, Python, MySQL, Shopify, PHP, JavaScript, Web Design, Desktop Application, Software Testing, API, jQuery, Vue.js, CSS 3, Standalone Application, React, HTML5, Software Architecture & Design, Angular, API Integration, Front-End Development Framework, Adobe Photoshop, React Native, blockchain developer, MongoDB, full-stack web developer, mern stack developer, ios app, php developer, game developer, Graphic Design, full stack developer, c#, front end developer, full stack web developer, front end web developer, web developer wordpress, web app developer, shopify web developer, Web Development, Responsive Design, WooCommerce, Cross Browser & Device Compatibility, Website, Website Security, Website Migration, Website Backup, react native developer, python developer, full stack react developer, react developers ethiopia, react js developer, react web developer, Front-End Development, React Bootstrap, TypeScript, Redux, wordpress website, shopify developer, seo, WordPress Customization, WordPress Plugin, bbPress, WordPress Backup, WordPress Installation, WordPress Optimization, Elementor, WordPress Development, WordPress Security, WordPress Migration, WordPress Bug Fix, WordPress Theme, WordPress SEO Plugin, flutter developer, Mobile App Development, Native App Development, Mobile App Design, App Development, Social Media Account Integration, Android App Development, Mobile App, Swift, Kotlin, iOS Development, Java, Mobile App Improvement, User Profile Creation, Mobile App Testing, Hybrid App Development, Flutter, Smartphone, Mobile App Bug Fix, Android, Mobile App Redesign I am not a mobile app developer but I have such capacity in my team. I am full stack developer and software architect with 10 years of experience and highest posible AI adoption expertise. I am web developer fullstack Software developer Test section: Next.js, GitHub, OpenAI Codex, Code Review, Cursor, SEO Performance, Affiliate Marketing, Affiliate Marketing Website Vercel, Strapi, Amazon API, CMS, Analytics, Conversion Optimization, Recommendation Engine, Prompt Engineering, Fractional CTO, Technical Product Manager, Startup Tech Lead AI Agent Development, AI Development, Amazon Web Services Postgres, AWS, OpenAI API, Claude API, LLM, AI Agent, Anomaly Detection, Document Parsing, Enterprise UI, Manufacturing, B2B, Salesforce, Vue 3 , React,

Available to start immediately Top Rated Freelancer | 100% Job Success I help founders and startups build AI powered SaaS products, custom web applications, and scalable platforms from idea to production. My focus is on shipping fast, building clean architecture, and creating systems that are ready for real users and growth. I work across the full stack and often take products from concept to launch, including system design, development, integrations, and deployment. I specialize in building AI SaaS platforms, automation systems, and modern web applications where performance, scalability, and clean engineering matter. I have experience building products in SaaS, Healthcare, Fintech, Ecommerce, Marketplaces, Booking Systems, and AI driven platforms. What I can help you build: • AI powered SaaS platforms with dashboards, subscriptions, and multi-role systems • AI features like chatbots, RAG systems, copilots, agents, and automation workflows • Full stack web applications using scalable modern architecture • Ecommerce platforms with Stripe billing, subscriptions, and custom checkout • Marketplaces, booking systems, CRMs, and internal business tools • Backend systems, APIs, and database design that scale • Secure healthcare and data sensitive applications • Legacy or enterprise systems using Laravel and PHP Core Stack: Next.js, React, Node.js, NestJS, TypeScript, PostgreSQL, Supabase, AWS, Stripe, OpenAI, Claude, LangChain, RAG pipelines, vector databases (Pinecone, Weaviate), Laravel, PHP AI / LLM Experience: • OpenAI (GPT-4o, GPT-4o-mini) integrations • Claude API integrations • RAG systems with embeddings and vector search • AI chat systems, copilots, and automation agents • Prompt engineering and workflow automation • AI powered SaaS features and internal tools Why clients hire me: • Product thinking, not just coding • Fast execution with clean architecture • Strong experience in AI + SaaS systems • Reliable communication and updates • Ownership from idea to deployment • Focus on scalable long-term systems Lets connect to discuss more.

✅ 𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝟳-𝟴 𝗳𝗶𝗴𝘂𝗿𝗲 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀 & 𝗦𝗮𝗮𝗦 𝗰𝗹𝗶𝗲𝗻𝘁𝘀/𝗮𝗽𝗽𝘀 𝗮𝗰𝗾𝘂𝗶𝗿𝗲𝗱. ✅ 𝟳𝟱+ 𝗮𝗽𝗽𝘀 𝗯𝘂𝗶𝗹𝘁. 𝟭𝟭+ 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. ✅ 𝗔𝗰𝗰𝘂𝗿𝗮𝘁𝗲 & 𝗴𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱 𝗾𝘂𝗼𝘁𝗲𝘀 𝘄𝗶𝘁𝗵 𝟯𝟬-𝟰𝟬% 𝗹𝗼𝘄𝗲𝗿 𝗰𝗼𝘀𝘁𝘀 𝗮𝗻𝗱 𝗱𝗲𝘃 𝘁𝗶𝗺𝗲𝘀 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗽𝗿𝗼𝗽𝗿𝗶𝗲𝘁𝗮𝗿𝘆 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 𝘂𝘀𝗲(prebuilt-SaaS code). ✅ 𝗣𝗵𝗲𝗻𝗼𝗺𝗲𝗻𝗮𝗹 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝘀𝗸𝗶𝗹𝗹𝘀. 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗱𝗲𝘃 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗳𝗼𝗹𝗹𝗼𝘄𝗲𝗱 𝗯𝘂𝗶𝗹𝘁 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗼𝘁𝗵𝗲𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀. ✅ 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲-𝗿𝗲𝗮𝗱𝘆 𝗳𝗿𝗼𝗺 𝗹𝗮𝘂𝗻𝗰𝗵. ✅ 𝗨𝗦 𝗰𝗹𝗶𝗲𝗻𝘁 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝘁𝘆. Hi, I’m Andrew! I specialize in delivering polished SaaS apps consistently focused on earning revenue. 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗮𝗻𝗱 𝗶𝗳 𝘁𝗵𝗲𝗿𝗲’𝘀 𝗮 𝗹𝗶𝗸𝗲𝗹𝗶𝗵𝗼𝗼𝗱 𝗼𝗳 𝗮 𝗴𝗼𝗼𝗱 𝗳𝗶𝘁 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿, 𝗜’𝗹𝗹 𝗶𝗻𝘃𝗶𝘁𝗲 𝘆𝗼𝘂 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 🗣 𝗝𝗼𝗵𝗻 𝗠𝘂𝗹𝗹𝗲𝗻𝗵𝗼𝗹𝘇 - 𝗛𝗲𝗮𝗱 𝗼𝗳 𝗦𝗮𝗹𝗲𝘀, 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 - 𝗨𝗯𝗲𝗿 𝗘𝗮𝘁𝘀 ❝ Andrew is the most skilled freelancer and developer I have ever worked with, and I have worked with a lot. He was able to take very broad ideas and turn them into actionable insights and plans in a way I could never imagine was possible. Andrew is the best possible thing to happen to our business and the definition of a true professional. I could not recommend him enough. Anyone who has the opportunity to work with Andrew should consider themselves extremely lucky. ❞ I excel at expertly guiding the app dev process to max out your revenue-earning potential in contrast to your costs, and to steer you away from common SaaS app pitfalls. Client Outcome Examples: ⚡ amzalert.com (8-Figure Acquisition - Rebuilt In 4 Months) ⚡ launchcontrol.us (8-Figure Annual Recurring Revenue - ARR) ⚡ GuestBan.com (Concept-To-Live in 5 Months - 1M+ Monthly App Checkins) My support is based on hard-won successes built through more than a decade of SaaS app obsession. Most of my clients are: ☑️ Existing Businesses - Post-revenue ☑️ Solopreneurs & Small Teams - Wanting to build an MVP app ☑️ Funded Startups - Focused on turning funding into MRR ☑️ Existing Early Stage SaaS - Want to rebuild and scale up I’m the founder of a small, hand-picked team of talented humans. I’m personally involved in all projects, and we only employ senior developers and native English speakers from the US for project management and communication. My team and I are able to consistently reduce dev costs by about 30-40% by leveraging pre-built development frameworks for common app experiences like the user login or checkout, for example, while reserving valuable dev hours for truly custom functionality. Every project we build delivers: 📱Cross Device Compatibility - Desktop - Mobile - Tablet 📈 App Speed Optimization 🧩 Scaleable - Cost-Effective Feature Addition Potential 🛡️ Security 📊 User Analytics & Internal Dashboards 🌐 Multi-Language Localization 🤖 Quality Assurance - QA 📜 Paid User Subscription, Billing & Renewal Management Thanks for taking the time to learn more about me. Invite me to your project or send me a direct message if you’re interested in working together. Talk soon! Andrew Mace - Founder - Lean Engineering Highlights of the work I have extensive experience in includes: SaaS MVP • AI Automation • No-Code/Low-Code • Process Automation • RPA • .NET 8 • Python • AWS • Azure • Docker • Serverless • OpenAI / ChatGPT • Generative AI • Zapier • Make.com • UiPath • Power Automate • n8n • Bubble • Airtable • Stripe • PayPal • Twilio • Slack • Teams • REST APIs • Webhooks • SQL • PostgreSQL • Redis • Power BI • KPI Dashboards • ETL • Airflow • Real-Time Chat • Push Notifications • Subscription Billing • CRM Integration • Lead Generation Bots • Data Analytics • Digital Transformation • Workflow Automation • Rapid Prototyping

𝗜 𝗵𝗮𝘃𝗲 𝗯𝘂𝗶𝗹𝘁 𝗮𝗻𝗱 𝘀𝗵𝗶𝗽𝗽𝗲𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝘂𝘀𝗲𝗱 𝗯𝘆 10,000+ 𝗿𝗲𝗮𝗹 𝘂𝘀𝗲𝗿𝘀 𝗮𝗰𝗿𝗼𝘀𝘀 𝗳𝗶𝗻𝘁𝗲𝗰𝗵, 𝗦𝗮𝗮𝗦, 𝗮𝗻𝗱 𝗔𝗜. 𝐍𝐨𝐭 𝐝𝐞𝐦𝐨𝐬, 𝐧𝐨𝐭 𝐩𝐫𝐨𝐭𝐨𝐭𝐲𝐩𝐞𝐬. 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 𝗿𝘂𝗻𝗻𝗶𝗻𝗴 𝟮𝟰/𝟳. 𝗠𝗼𝘀𝘁 𝗔𝗜 "𝗽𝗿𝗼𝘁𝗼𝘁𝘆𝗽𝗲𝘀" 𝗻𝗲𝘃𝗲𝗿 𝗺𝗮𝗸𝗲 𝗶𝘁 𝘁𝗼 𝗹𝗮𝘂𝗻𝗰𝗵. 𝗜 𝗯𝘂𝗶𝗹𝗱 𝘁𝗵𝗲 𝗼𝗻𝗲𝘀 𝘁𝗵𝗮𝘁 𝗱𝗼. 𝐈'𝐦 𝐚 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝗔𝗜 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗦𝗮𝗮𝗦 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 & 𝗜 𝗯𝗿𝗶𝗱𝗴𝗲 𝘁𝗵𝗮𝘁 𝗴𝗮𝗽. I take what you've already built, a Replit demo, a rough MVP, a half-finished app, and turn it into a production-ready SaaS with clean architecture, AI integrations, and the reliability that real users demand. Not demos. Not proofs of concept. Systems that you can actually sell, scale, and be proud of. 𝐖𝐡𝐚𝐭 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐬𝐚𝐲: "Turned a Replit prototype into a functional app ready for commercialisation" / "Goes beyond expectations every time" / "Incredibly resourceful, industrious, and genuine." 𝗔𝗜 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗦𝗮𝗮𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 ✔ Frontend: Next.js, React, TypeScript, Tailwind, Shadcn ✔ Backend: FastAPI, Django, NestJS, Node.js, Express ✔ Databases: PostgreSQL, MongoDB, Redis, Firebase , Supabase ✔ APIs: Stripe, OAuth, REST, GraphQL, Webhooks 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 & 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 ✔ AWS (EC2, S3, RDS, Lambda), Docker, CI/CD ✔ Performance optimisation, security hardening, cost reduction 𝗔𝗜 & 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 ✔ LLM integrations with OpenAI, Claude, LangChain, RAG pipelines ✔ AI voice agents using Vapi, Retell AI, Twilio ✔ Custom AI tools, chatbots, embedding-based search ✔ Vibe coding tools: Cursor, Bolt.new, Lovable, Replit, v0 𝗪𝗵𝘆 𝗙𝗼𝘂𝗻𝗱𝗲𝗿𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 ✔ Top Rated with 100% Job Success and all 5-star reviews ✔ I think with you about the product, not just the code ✔ Clear communicator, fast responder, accountable for outcomes ✔ Delivered across SaaS, AI, FinTech, HealthTech, and eCommerce 𝗜 𝘄𝗼𝗿𝗸 𝗯𝗲𝘀𝘁 𝘄𝗶𝘁𝗵 founders who have a prototype that needs to become a real product, SaaS teams adding AI without breaking what's already working, and businesses that tried another developer and need it done right this time. If you're ready to build something that lasts, hit Invite or Message and tell me where you're starting from. I'll tell you exactly how I'd approach it. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Top Rated Full Stack Developer, MVP Developer, SaaS Developer, AI Developer, Next.js Developer, FastAPI Developer, Python Developer, React Developer, Node.js Developer, LLM Integration, RAG Pipeline, Voice AI, Vapi Developer, Twilio Developer, OpenAI Integration, Prototype to Production, Startup Developer, AI SaaS, TypeScript Developer, Stripe Integration, LangChain Developer

If you're building a SaaS product, CRM system, or AI-powered web app — and you need it done right the first time — I'm the developer you're looking for. 12 years of full-stack development. 100% Job Success Score. $100k+ delivered on Upwork. I work with founders, product teams, and agencies who need a senior engineer they can trust, not just a coder they have to manage. Here's what I build: → Custom SaaS platforms — multi-tenancy, subscriptions, role-based access, billing → CRM & ERP systems — pipelines, dashboards, automation, reporting → AI-powered applications — OpenAI/ChatGPT API integration, smart workflows, AI assistants → E-commerce — Shopify custom development, WooCommerce, payment integrations → High-performance dashboards — real-time data, WebSockets, complex analytics Core stack: Laravel · React · Node.js · Next.js · MySQL · PostgreSQL · AWS · Docker I take ownership of the full product lifecycle — architecture, development, deployment, and long-term support. I flag problems before they become blockers, communicate without being chased, and write code that the next developer won't curse me for. If that sounds like what you need, send me a message. I respond within a few hours.

I build AI-powered SaaS products, MVPs, web apps and WordPress solutions that go from idea to a working product fast, with scalability and production readiness. If you’re looking to: • Build an MVP quickly without wasting months • Add AI (OpenAI, GPT-4o) to your product • Create a chatbot trained on your own data (RAG) • Automate workflows using AI agents • Turn an idea into a real, usable product You’re in the right place. About Me: I’m Sanjeev, a Full-Stack AI Developer with 7+ years of experience building scalable web applications, custom WordPress solutions, and AI-driven products. I focus on shipping working solutions, not overengineering. WordPress & PHP Development • Custom WordPress websites and themes • Custom plugin development • Headless WordPress solutions • WordPress performance optimization • PHP application development and maintenance • API integrations and custom functionality AI & Automation: • OpenAI (GPT-4o, Assistants API) • Claude (Anthropic) • Google Gemini API • Llama (open-source LLMs) • RAG pipelines (LangChain, LlamaIndex) • AI agents (AutoGen, CrewAI) • Vector databases (Pinecone, Weaviate, Supabase Vector) • Workflow automation (n8n, Zapier) • Voice AI (Whisper, ElevenLabs, real-time agents) • Document AI (OCR + semantic search systems) Full-Stack Development: • Frontend: React, Next.js, Angular • Backend: Node.js, Nest.js • Databases: MongoDB, PostgreSQL • APIs: REST & GraphQL • Cloud & deployment (AWS) SaaS & MVP Development: • End-to-end SaaS builds • Multi-user systems & authentication • Subscription systems (Stripe) • Admin dashboards • Scalable architecture What You Can Expect • Clean, scalable, maintainable code • Fast turnaround with practical execution • Clear and consistent communication • Focus on getting your product live quickly Recent Work • AI-powered healthcare assistant • GPT-based document processing SaaS • Custom chatbot with private knowledge base • GPS tracking platform • E-commerce automation system 📩 Let’s build something impactful. Click Invite and share your idea. I’ll help you validate, architect, and launch it efficiently.

I build scalable SaaS platforms, AI-powered applications, and production-ready MVPs designed for real growth, not just prototypes. As a Full Stack Engineer, I take ownership of your product from architecture to deployment, ensuring clean code, fast delivery, and long-term scalability. If you're looking for a developer who can take ownership of your product from architecture to deployment, ship fast, and write clean maintainable code, you're in the right place. ───────────────────────────── 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐄𝐋𝐈𝐕𝐄𝐑 ✅ 𝐒𝐚𝐚𝐒 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: Multi-tenant SaaS platforms, subscription systems, admin dashboards, RBAC (role-based access), user management, scalable backend architecture, and enterprise workflows. ✅ 𝐌𝐕𝐏 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐟𝐨𝐫 𝐒𝐭𝐚𝐫𝐭𝐮𝐩𝐬: Turn ideas into working products quickly with scalable foundations. ✅ 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 & 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧:OpenAI/Claude APIs, RAG systems, chatbots, and automation workflows. ✅ 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐖𝐞𝐛 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: React.js, Next.js, Node.js, Express.js, Python, FastAPI, Django, REST APIs, GraphQL, authentication systems, third-party API integrations, and cloud deployment. ✅ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: PostgreSQL, MongoDB, MySQL, Firebase, Redis, scalable API architecture, optimized database design, caching systems, and performance-focused backend development. ✅ 𝐏𝐫𝐨𝐠𝐫𝐞𝐬𝐬𝐢𝐯𝐞 𝐖𝐞𝐛 𝐀𝐩𝐩𝐬 (𝐏𝐖𝐀): Fast, mobile-friendly web applications with offline support, push notifications, app-like experience, and responsive UI/UX. ✅ 𝐂𝐑𝐌 & 𝐈𝐧𝐭𝐞𝐫𝐧𝐚𝐥 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐓𝐨𝐨𝐥𝐬: Custom CRM systems, sales pipelines, reporting dashboards, workflow automation, employee portals, and operational management systems. ───────────────────────────── 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 Frontend: React.js, Next.js, TypeScript, JavaScript, Tailwind CSS Backend: Node.js, Express.js, Python, FastAPI, Django Databases: PostgreSQL, MongoDB, MySQL, Firebase, Redis AI & Automation: OpenAI API, Claude API, LLM Workflows, RAG Systems Cloud & DevOps: AWS, Vercel, Docker, APIs, Webhooks, CI/CD Integrations: Stripe, Twilio, Firebase, Auth Systems, Third-Party APIs ───────────────────────────── 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐈𝐄𝐒 𝐈'𝐕𝐄 𝐖𝐎𝐑𝐊𝐄𝐃 𝐖𝐈𝐓𝐇 • Fintech & Payment Systems • LegalTech & Document Automation • EdTech & LMS Platforms • HealthTech & Telemedicine • CRM & B2B SaaS Platforms • Real Estate & Property Management • eCommerce & Multi-Vendor Marketplaces • Logistics & Supply Chain Systems • AI Automation & LLM Applications • HRMS & Workforce Management • Analytics & Business Intelligence Tools • Marketplace & Community Platforms • FoodTech & Restaurant Platforms • API Integration & Workflow Automation ───────────────────────────── 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 𝐌𝐄 ✔ End-to-end ownership (Architecture to Deployment) ✔ Focus on performance, security, and maintainable code ✔ Clear communication and consistent updates ✔ Experience building both startup MVPs and enterprise systems I ask the right technical and business questions before starting to avoid expensive problems later. Whether you need a SaaS platform, AI integration, or a custom CRM, I help you build it properly. Ready to start? Invite me to your job post or send a message to discuss your project.

✮ 18+ years in IT. ✮ Worked with several Fortune 500 Companies ✮ Experienced Full Stack Developer ✮ Worked with British Telecom, AT&T, Google, IBM, etc. ✮ 100% refund policy. ✮ Available 18 hours a day. Prior to this I have worked with several fortunes 500 companies which include British Telecom, AT&T, Google, IBM before start my own freelancing work. Having more than 18+ years rich knowledge in IT and handled more than 3000+ live projects I can guarantee that I will add value to your projects. If I can’t deliver anything I won’t charge for my time, and in this world nobody wants to work for free. [ What I can provide ] ✮ Angular JS 6 Development ✮ Node JS Development ✮ Python Development ✮ React JS ✮ Meteor JS ✮ Express JS / Sails JS ✮ Vue JS ✮ TypeScript ✮ AngularDart ✮ Dart ✮ Mobile App ✮ IOS Development ✮ Android Development ✮ Swift 4 ✮ Java 8 ✮ Objective C ✮ Google Kotlin ✮ React Native ✮ Google Flutter ✮ E-commerce Development ✮ Magento Development ✮ Website development ✮ Mobile Back end development ✮ Graphic design + UI & UX implementation ✮ Consulting in mobile app development ✮ Startup Development I am having strong expertise in database, here is few in the list, ✮ MS SQL ✮ Mongo DB ✮ My SQL ✮ Maria DB ✮ SQL Lite ✮ Amazon Dynamo DB ✮ Amazon Aurora Expertise in Blockchain: ✮ Smart Contracts development using Solidity ✮ Subgraph indexing using the graph ✮ Tokenomics ✮ Vesting ✮ Web3 integration ✮ In-depth knowledge of ERC20 & ERC721 Smart Contracts ✮ NFT contract ✮ Token/ coin Contract ✮ Defi EXchange ✮ BEP1155 ✮ Hardhat ✮ NFT minting Also I am comfortable with Cloud Computing using Amazon AWS, GCloud, MS Azure. Here is my system programming exprience, ✮ Docker ✮ Kubernetes ✮ Jenkins ✮ Google App Engine ✮ Micro Services ✮ Amazon Elastic Container Services ✮ Amazon Elastic Beanstalk ✮ Amazon EBS ✮ Amazon AWS CLI ✮ Elastic Cache ✮ Mem Cache ✮ Redis Cache Also I am comfortable with Analytical information or Search engine development. Here is my informations below, ✮ Apache Solr Search ✮ Amazon Elastic Search ✮ Amazon Red Shift ✮ Kibana ✮ Lucene ✮ Sphinx ✮ Xapian [ My Domain Experience ] ✮ On-Demand Service app ✮ SAAS ✮ Uber-like app ✮ Food delivery website and app ✮ Restaurant website and app ✮ Travel website and app ✮ Social network website and app ✮ Upwork like service marketplace website and app. ✮ Crowdfunding website and app ✮ Service provider finder app ✮ GPS apps ✮ Product selling website and app ✮ Event ticket-selling website ✮ Daily Deal website and app ✮ E-commerce website and app ✮ Dating website and apps ✮ Rideshare apps Also I am comfortable with several open source system, like follows, ✮ Magento ✮ WordPress ✮ Drupal I love my job as working with different clients has given me the opportunity of being a part of so many wonderful ideas and journeys. My approach to work is to go beyond the job description and focus on building a long lasting relationship with all clients.