6+ years building full-stack web products that ship on time and hold up in production. I work across the full stack, from React and Next.js interfaces to Node.js and Laravel backends, and I take ownership of the whole thing. What I work on: Web applications and SaaS platforms in React, Next.js, and TypeScript. Backend services, REST APIs, and GraphQL in Node.js, Express.js, and Laravel. JavaScript and TypeScript across both frontend and backend. Third-party integrations and webhooks: Stripe, HubSpot, Salesforce, Twilio, and custom CRM and payment APIs. Real-time features with WebSockets and server-sent events. CI/CD pipelines, automated testing, and deployment on AWS, Docker, and GitHub Actions. Performance optimization and security hardening built in from the start. Core stack: JavaScript, TypeScript, React, Next.js, Node.js, Express.js, Laravel, PHP, PostgreSQL, MySQL, MongoDB, REST APIs, GraphQL, WebSockets, AWS, Docker, GitHub Actions, Vercel, Tailwind CSS, Redux, Zustand Good fit for: SaaS products, internal tools, API integrations, marketplace platforms, e-commerce, web applications, product rebuilds and migrations, startup MVPs. I work within the Softermii team, a full-cycle software and AI development company with 100+ products delivered across healthcare, fintech, real estate, logistics, and e-commerce. We also use Apex, our internal delivery framework, which keeps scope tight, prevents rework, and makes delivery timelines predictable.

Recent Advanced AI Integrations 🧠 AI Construction Design Assistant (OpenAI + PDF Intelligence) Built an AI assistant that reads architectural PDF blueprints, extracts measurements and design data, and provides intelligent, context-aware responses based on construction layouts. 📸 Image-Based Shopping Assistant (Twilio + Node.js + ML) Developed an AI-powered visual search system where users send images via SMS (Twilio). Images are processed through an ML model to fetch similar products, displayed dynamically in React with direct purchase redirection. 🎙️ Real-Time AI Voice System (Twilio + Deepgram + OpenAI + ElevenLabs) Engineered a low-latency AI voice pipeline: speech → transcription (Deepgram) → AI response (OpenAI) → voice synthesis (ElevenLabs) → real-time response back to caller via Twilio. 🚀 Full-Stack & AI Solutions Partner | React | Node.js | Java | Cloud | Automation Expert in React, Next.js, Angular, Node.js, Java, AI Automation, Cloud & Scalable Systems 40+ Projects Delivered | Web, Mobile & Enterprise Applications Specialist in SaaS, FinTech, EdTech, SolarTech & Custom Business Platforms Secure, High-Performance, Future-Ready Solutions Payments • Realtime Systems • AI Chatbots • Integrations • Automation My 15+ years of journey as a Full Stack Developer have taught me that I can succeed only by having my clients succeed. I am a seasoned professional adept at architecting and developing robust, scalable solutions for web and mobile platforms. My expertise encompasses the entire software development lifecycle, from concept to deployment, ensuring quality and performance. I started with J2EE related technologies such as JSF, Spring, Hibernate, Solr, etc.. and In parallel, I continued to work in the field of Software Architecture and Design, which helped me get certified as an Oracle Enterprise Architect and an Accenture Senior Technology Architect. My Key Skills: Backend: Java, NodeJs, Python Frontend: HTML5, CSS3, JavaScript, React.js, Angular, Vue.js AWS Platforms: Cloud formation stack using AWS library or Terraform, Glue, RedShift, Kinesis Streams, Lamdba, Gateway API, DynamoDB, S3 etc.. Databases: MySQL, MongoDB, PostgreSQL, and Firebase Mobile Platforms: Android, iOS Swift, Cordova, Ionic, React Native Version Control: Git, SVN, BitBucket, and GitLab Testing: Cypress, JUnit, Selenium,JMeter, QTP, SOAP UI, Cypress Below are some of the libraries that I have used of the above technologies: * Java libraries like Apache Commons, Spring Framework, Hibernate, JAX-RS, Jackson, Slf4j, Apache HttpClient, Lombok, Mockito, JavaMail etc. to handle backend logic like mapping objects to database, HTTP requests, RESTful web services, dependency injection, reduce boilerplate code, mail sending. * Node.js libraries like HTTP, Stream, Util, OS, Crypto, Events etc. to handle back end logic related to API Integration, read/write to streams, Async, encryption/decryption, custom events and event listeners. * Angular libraries like Angular Material, NgRx, Angular Forms, RxJS, Angular CLI, ngx-charts etc. to handle HTTP requests, asynchronous data streams, Material Design principles, chart components, generating components, services, modules, and more. * React libraries like React Router, Material-UI, Axios, Styled-components, Formik, React Hook Form etc. to handle routing components, buttons, forms, navigation bars, dialogs, asynchronous HTTP requests, manage styles, form state, validation, and submission. * Vue.js libraries like Vue Router, Vue CLI, Vue Chart.js, Nuxt.js etc. to handle routes, navigate between views, plugins, responsive and customizable charts, automatic code splitting, server-side rendering. Work Process: I start by closely collaborating with clients to understand their needs and goals. Propose a solution for a given project requirement. I will take an iterative approach to development, incorporating feedback at every stage. Rigorous testing is conducted to ensure reliability, security, and performance. I assist in deploying the solution and provide ongoing support and maintenance as required. Guarantee: To start, I offer 2 weeks of my free service to assess my skillset for a project. My work comes backed by a 60-day satisfaction guarantee, ensuring that the customer is fully satisfied with the results and that all the concerns raised will be addressed promptly. And in case my work exceeds the assigned budget then I will ensure that the pending work is delivered at NO ADDITIONAL COST!!

Senior Mobile App Developer specializing in React Native & Expo. 8+ years shipping production apps for startups and product teams — Top Rated on Upwork with 100% Job Success, 1,300+ hours, and 20+ apps live on the App Store and Play Store. I help founders and product teams turn ideas into App Store-ready mobile apps — and rescue React Native codebases that have stalled. Whether you're building an MVP, scaling an existing app, or migrating from native to cross-platform, I deliver clean, performant code and ship on time. What I build: React Native & Expo apps (managed and bare workflow, SDK 50+) Native iOS apps in Swift and SwiftUI Full App Store & Play Store release cycles, including builds, signing, and review Refactors, performance fixes, and codebase cleanups on legacy projects Backend integrations — REST, GraphQL, Firebase, Supabase, Node.js Tech stack: React Native, Expo, TypeScript, Redux Toolkit, Redux-Saga, React Navigation, React Query, Swift, SwiftUI, Xcode, Node.js, Firebase, push notifications, in-app purchases, deep linking, EAS Build, OTA updates. How I work: Daily updates, fast response (usually under an hour during my work window), honest timelines, and I raise risks before they become blockers. Comfortable owning the full mobile track solo or plugging into an existing engineering team. A good fit if you: Need a senior developer who can ship without hand-holding Value clean code, clear communication, and reliability over the lowest hourly rate Want someone who'll still be around in 6 months for v2 and maintenance Send a message with what you're building — I'll reply within a few hours with honest feedback on scope, timeline, and whether I'm the right person for the job.

Tired of choosing between backend developers, automation specialists, and SaaS builders? I do it all—production-grade systems that work. 🏅 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 with 6+ years: 250+ projects, 40+ automation systems (95-99% uptime), 15+ AI SaaS platforms, 20+ directory sites ✅ 𝐂𝐥𝐢𝐞𝐧𝐭-𝐟𝐢𝐫𝐬𝐭—tested, documented, scalable, compliance-ready deployments only 🌟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: full-stack SaaS (React/Next.js + Node.js/Python), automation (n8n, Closebot, Retell AI), platforms (Brilliant Directories, WordPress), AI (OpenAI, LangChain, RAG) ✅ 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝: 90%+ cost cuts, 40-60% faster launches, 1,500+ monthly appointments (zero missed), millions of records processed I solve: broken APIs, critical bugs, legacy code, 24/7 automation, scalable SaaS, monetized directories, converting voice agents. Backend fixes, MVPs in weeks, production systems, compliance-ready builds. 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 ✅ 𝐀𝐈 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 ✓ Voice Agents (Retell AI, Synthflow) - answering calls, booking appointments, sending summaries ✓ Closebot (40+ bots) - HVAC, plumbing, solar, emergency routing, dynamic pricing, CRM sync ✓ n8n Workflows (60+ nodes) - video production, database reactivation, booking sync, lead enrichment ✓ GoHighLevel - booking automation, lead qualification, SMS/email campaigns ✓ Multi-Platform Booking - Google Calendar + Square + GHL (1,500+ appointments, zero conflicts) ✓ WhatsApp Bots - RAG, LangChain, Pinecone search, interactive automation ✓ Lead Enrichment - Hunter.io integration, email discovery, database building ✅ 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐒𝐚𝐀𝐒 ✓ AI SaaS MVPs - OpenAI, LLMs, voice/chat AI, real-time features ✓ Full-Stack Platforms - React/Next.js + Node.js/Python + Supabase + payments ✓ Fintech Solutions - Stripe, Plaid, custom billing, PCI-DSS compliant ✓ Healthcare Platforms - HIPAA/FHIR/HL7, patient data, BI dashboards ✓ Payment Systems - recurring billing, invoicing, financial dashboards ✓ Real-Time Features - WebSockets, live dashboards, collaboration, multi-tenant ✅ 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 & 𝐂𝐨𝐧𝐭𝐞𝐧𝐭 ✓ Brilliant Directories - membership sites, monetization, member imports, SEO ✓ WordPress - WooCommerce stores, LMS, booking systems, plugins ✓ Directory Monetization - listing management, tier-based access, admin dashboards ✓ Database Integration - Google reviews, member imports, geo-targeting ✅ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈 ✓ API Development - REST, GraphQL, third-party integrations, OAuth, JWT ✓ Backend Systems - Django, FastAPI, Flask, Express (scalable, production-ready) ✓ Database Design - PostgreSQL, MySQL, MongoDB (schema design, optimization, tuning) ✓ Automation Scripts - Python, cron jobs, ETL pipelines, background tasks ✓ Bug Fixing - legacy cleanup, optimization, technical debt elimination ✅ 𝐃𝐚𝐭𝐚 & 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 ✓ Data Pipelines - Airflow, Snowflake, BigQuery warehousing, ETL ✓ BI Dashboards - Power BI, Tableau, custom analytics, KPI tracking ✓ ML Integration - predictive analytics, recommendations, sentiment analysis ✅ 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 ✓ Cloud - AWS, GCP, Vercel, Firebase, Supabase ✓ DevOps - Docker, Kubernetes, CI/CD, GitHub Actions ✓ Security - HIPAA, PCI-DSS, SOC2, encryption, OAuth/JWT ✓ Monitoring - Sentry, CloudWatch, error tracking, alerts ✅ 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 ✓ LLM Systems - OpenAI, LangChain, RAG, Pinecone vectors ✓ Voice AI - TTS (ElevenLabs), STT (Whisper), conversational agents ✓ Content Automation - Cassidy AI, video production (Flux, Kling), multi-platform publishing ✓ NLP/Chatbots - intent detection, sentiment analysis, knowledge bases 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 Frontend: React, Next.js, TypeScript, Tailwind Backend: Python (Django, FastAPI, Flask), Node.js, PHP, GraphQL Databases: PostgreSQL, MySQL, MongoDB, Supabase, Firebase Automation: n8n, Make, Zapier, Celery, cron Voice AI: Retell, Closebot, Synthflow, LangChain, RAG AI/ML: OpenAI, GPT-4, Whisper, TensorFlow, PyTorch Platforms: Brilliant Directories, WordPress, WooCommerce Payments: Stripe, Plaid, Square Data: BigQuery, Snowflake, Airflow, Power BI, Tableau Cloud: AWS, GCP, Vercel, Docker, Kubernetes Integrations: Google Sheets, Airtable, Twilio, Hunter.io, HubSpot, GHL Need full-stack ownership—frontend to backend to AI to DevOps? Message now. Fast response, faster delivery. ✅ Keywords: AI SaaS, n8n, Closebot, Retell AI, GoHighLevel, Brilliant Directories, WordPress, LLM, OpenAI, LangChain, Next.js, React, Node.js, Python, Django, FastAPI, API, Stripe, Plaid, PostgreSQL, MongoDB, HIPAA, PCI-DSS, fintech, healthcare, Docker, Kubernetes, AWS, ETL, BigQuery, chatbot, NLP, email finder, automation, SaaS MVP, scalable, production-ready

Looking to implement the solution that will help you accelerate your business? Let me help you to bring that idea to life. ===================================== Things I can help you with ===================================== ✅Nail down the app and the website that will make your processes easier ✅Answer any question in regards of app and web development ✅Design light and smooth workflows ✅Identify opportunities and synergies in your processes ✅ChatGPT integration expert Area of Proficiency: ================= - iOS and Android: Swift, SwiftUI, Xcode, Kotlin, Java, Objective C, Android Studio - PHP, Python, Javascript, HTML5, CSS3 - React Native, Flutter, Ionic, React, XML, Redux - Laravel, Cake, Code Ignitor, WordPress, Drupal, Jquery, Ajax - Database: MySql, MongoDB, NoSQL, PostgreSQL - MEAN and MERN Stack: Node.JS, Express.JS, Angular, React.JS. My comprehensive approach to development includes: ============================================== - Strategy - Design - Architecture - Planning - Development - Quality Control - Maintenance & Support But I don’t stop there - I also specialize in cutting edge technologies such as: ============================================================== **Machine Learning** - OpenAI, Llama, Elevent Labs, Google TTS, Tesseract - Pre-LLM based using OpenAI, Custom models generation - Predictive Models, NLP, Computer Vision, Chatbots, AI Agent, Recommendation Engines **Bluetooth devices** - BLE - Beacon I have deep expertise in routine areas such as: ======================================== **Real Time Streaming of Video/Audio** **e-Commerce Shops** **In-App Purchases** **Secure Payment Processing via Bank/Credit/3rd party** **Email & Push Notifications** **Real Time Chat/Chat Bots** **Location Services** ˃ Dating app ˃ Fintech app ˃ Healthcare, Wellness app ˃ Taxi app ˃ Delivery app ˃ Chats & Messengers app ˃ Audio, Video chats app ˃ Fitness, Sport app ˃ Social media app ˃ Attendance app ˃ Babysitting app ˃ E-commerce app ˃ Employee scheduling app ˃ Fleet Management app ˃ Flight booking app ˃ Language Learning app ˃ Live streaming app ˃ Luggage storage app ˃ Meditation app ˃ On-demand services app ˃ Doctor appointment app ˃ Online pharmacy app ˃ Parking app ˃ Pet Sitter app ˃ Real estate app ˃ Restaurant app ˃ School Bus tracking app ˃ Survey app ˃ Task management app ˃ Telemedicine app In case my portfolio sparks your interest in working with me, let's meet up today and let's get the project rolling!

I’m a reliable Full Stack Developer with 8+ years of hands-on experience building high-performing web apps, SaaS platforms, and cross-platform solutions for businesses across the US, UK, and Europe. I’ve completed 7000+ hours here on Upwork, delivering consistent, high-quality results and long-term client relationships. I work full-time during US business hours (9AM–7PM EST/CST) and handle projects end-to-end - from concept to deployment and scaling. - Frontend: React, Next.js, Vue.js, Tailwind, Bootstrap - Backend: Node.js, Django, Flask, FastAPI, TypeScript, Python - Databases: PostgreSQL, MongoDB, MySQL, Supabase - DevOps & Cloud: Docker, GitHub Actions, AWS, GCP, Azure - AI & Automation: OpenAI, Langchain, custom GPT bots, AI chat assistants, Zapier, Rasa - Cross-Platform Apps: React Native, Flutter, Ionic - APIs & Integrations: REST, GraphQL, Firebase, Stripe, Twilio, SendGrid Recent Focus Areas: • Building AI-powered tools and GPT-integrated chatbots • Developing end-to-end SaaS platforms with real-time features • Delivering solutions in CRM, healthcare, real estate, edtech, and on-demand apps • Automating business processes using LLMs and APIs ✅ 9000+ Upwork hours - consistent, proven track record ✅ Clean, scalable, production-ready code ✅ Transparent communication & dependable delivery ✅ Fast turnarounds without compromising quality If you’re looking for someone who’s proactive, detail-oriented, and easy to work with, I’d love to help bring your next project to life.

🌟8+ Years Experience | 50+ Projects | 20,000+ Hours | $900K+ Earned | Upwork Top Performer | Flutter Developer | Mobile App Developer I’m a Flutter developer, mobile app developer, full stack developer, and web developer with 8+ years of experience building, fixing, and scaling mobile products for startups and growing companies. My work spans mobile app development, web development, and backend-connected product work, with a strong focus on clean architecture, smooth user experience, reliable delivery, and scalable app development. I’ve worked across Flutter, Flutter Dart, Flutter Firebase, React, React Native, Xamarin developer projects, Xamarin Forms, Xamarin.Forms, .NET MAUI developer builds, Swift developer work, SwiftUI, iOS, Android, iOS developer tasks, iOS Swift, Android developer tasks, Android Kotlin, Kotlin, native app developer projects, AI app development, MVP development, API integration, and cross platform mobile app architecture. I also support teams that need a practical full stack developer who can connect mobile apps with APIs, dashboards, cloud services, and web systems without slowing the project down. That mix of mobile app development and web development lets me work across the full product, not just one part of it. On Upwork, I’ve delivered 50+ projects, earned $800K+, and worked 20,000+ hours helping clients launch MVPs, modernize old apps, fix unstable codebases, and move products into production. That experience taught me how to balance speed with quality, especially when a project needs to ship quickly but still be stable enough for real users. It also taught me how to work with different teams, different product stages, and different technical constraints without losing momentum. For new products, I help with MVP development from concept to launch. For existing products, I step in to improve architecture, refactor weak areas, and make the app easier to maintain and scale. If you’re building a cross platform mobile app, I can help choose the right direction between Flutter, React Native, .NET MAUI, Xamarin migration, or native app development depending on the product goals, timeline, and long-term plan. I focus on making those choices practical, not trendy, so the app can grow without becoming harder to manage. I’m also a strong fit for AI app development projects where the product needs more than a basic interface. That might mean smart workflows, automated actions, backend logic, or API integration that connects the app to real business systems. In those projects, I pay close attention to stability, data flow, security, and the user experience, because a useful feature only matters if it works reliably in production. 💡 Areas I specialize in - SaaS and startup MVP development - from idea to production-ready MVP. - Cross platform mobile app architecture - Flutter, React Native, and .NET MAUI. - App modernization and legacy migration - Xamarin to .NET MAUI, Flutter, or React Native. - API integration and backend connectivity - for apps that need stable data flow and real-time features. - AI app development and product automation - for teams that want smarter app experiences. - Continuous delivery, refactoring, and codebase optimization - to keep existing products moving forward. - Mobile app development for iOS and Android - with a focus on stability, performance, and usability. - Full stack developer support - when mobile work needs web, API, or backend coordination. - Native app developer support - when the project needs platform-specific quality and performance. - React Native developer support - for teams already working in JavaScript-based mobile stacks. - Swift developer and iOS developer support - for polished Apple ecosystem apps. - Android developer support with Kotlin - for strong native Android performance. - Flutter developer support - for fast cross platform mobile app delivery. - Xamarin developer support - for legacy apps that need modernization or migration. - .NET MAUI developer support - for teams moving toward a modern Microsoft stack. - Cross platform mobile app delivery - when one codebase needs to support iOS and Android efficiently. I’m a good fit when you need a mobile developer who can think beyond screens and help shape the full product. Whether the goal is a fresh MVP, a native app for iOS or native Android or a cross platform mobile app that can grow over time, I focus on code quality, maintainability, and practical results. I also make sure the work stays aligned with product goals, so the app is not just built well, but built in a way that supports growth and future updates. 🚀 If you need a Flutter developer, React Native developer, Xamarin developer, .NET MAUI developer, Swift developer, iOS developer, Android developer, Kotlin developer, mobile app developer, web developer, MVP developer, API integration expert or full stack developer who can bring structure to a complex build and get it shipped - message or invite me - I’m ready to help!

Building software that solves business problems and supports long-term growth. With 14+ years of experience, I help startups, founders, and businesses build scalable SaaS platforms, AI-powered applications, automation systems, mobile apps, and custom business solutions. What I Can Help You Build • AI-Powered Applications & Chatbots • SaaS Platforms & MVP Development • Custom CRM & ERP Systems • Web Applications & Internal Business Tools • Mobile Apps (iOS & Android) • Workflow Automation & Process Optimization • API Development & Third-Party Integrations • Cloud-Based Scalable Solutions Core Technologies - Frontend: React.js, Next.js, Angular, Vue.js - Backend: Node.js, NestJS, Express.js, Java, Spring Boot, Microservices - Database: PostgreSQL, MySQL, MongoDB, Firebase - Cloud & DevOps: AWS, GCP, Docker, Jenkins, CI/CD - AI & Automation: OpenAI, LangChain, RAG, Pinecone, n8n, Make How I Work • Product-first approach focused on business outcomes • Scalable architecture designed for future growth • Clean, maintainable, production-ready code • Clear communication and transparent delivery process • Strong focus on performance, security, and reliability Why Clients Work With Me Over the years, I have helped businesses launch SaaS products, automate operations, integrate AI capabilities, and build systems that improve efficiency and support growth. Whether you're validating an MVP, scaling an existing platform, implementing AI features, or modernizing internal operations, I can help turn ideas into reliable, scalable solutions. If you're looking for an experienced partner to build a SaaS platform, AI solution, automation system, or custom web/mobile application, let's discuss your project requirements and goals.

12+ years of creative experience. Web, Mobile, SaaS, Branding, Logo, Colors, Vector Graphics (SVGs), Photoshop, Illustrator, Figma, Adobe Creative Cloud, Canva Pro, Adobe XD, Invision, Sketch. CMS- WordPress, Squarespace, Framer, Go High Level, Wix, Webflow, Weebly, Shopify etc. Coupled with: - HTML5/CSS3 (LESS / SCSS / SASS / PostCSS / CSS modules), JavaScript, AJAX, - UI/UX Banner Design, Logo Design, Flyer Design, Poster Design, Email Design, Anime Design, 2D Characters Design, HTML5 animated Banners Design, Social Media ADs, Post and all creative designs. - Responsive Web Design (mobile-first, touch-enabled) - CSS/UI frameworks like Bootstrap 5, Foundation Framework, MDL, Bulma - BEM, Atomic CSS - High-performance JS/CSS transitions and animations - Front-End JS frameworks like React (Flux, Redux, Redux-Saga, React-Apollo), React Native, AngularJS, Backbone, jQuery - Flow, Typescript - JavaScript testing frameworks: Jest, Enzyme I can bring out the best of your project and guide it through the entire design and development process, from analysis and planning to wireframes to interactive prototypes to user-friendly interfaces that are responsive, efficient, and compelling.

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) Beyond Development : I don't just build what's requested, I help identify the most effective technical solution before development begins. With 8+ 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. 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 | Replit | Claude | Lovable dev | Ai Website | Top rated plus Full stack developer Hire best Full Stack Developer upwork for AI-Powered SaaS platform & MVP Development #saas #mvp #aideveloper #react #node.js #next.js #bestdeveloper #fullstack #webapp #topratedplus