📌 I'm a professional full stack developer with 12+ years of experience with good analytical and programming skills 📌 I have completed many projects ( +70 project ) and worked hundred of hours ( +7600hr ) on Upwork for clients and companies from all over the world, which made me well adapted to work with both startups and big sized companies. 📌 What I can/know/etc.: Backend: .Net , Node.js FrontEnd: Angular , Vue.js 3 Payment Getways: Usaepay , CardKnox , Stripe Database: Ms Sql Server ,PostgreSQL , MongoDB ORM: Entity Framework , Mongoose , Sequelize Others : SignalR , Bootstrap ,Tailwind ,SCSS ,HTML, CSS, JavaScript, jQuery VCS: Github, VSO , Bitbucket Other:Twillio ( IVR , SMS , FAX ) , 📌 I'd be happy to offer my services, feel free to contact me .

♛ 𝐓𝐎𝐏-𝐑𝐀𝐓𝐄𝐃 𝐏𝐋𝐔𝐒 🥇 Microsoft Certified Developer 🥇 100% Job Success Ratio 🕐 16,000+ Upwork Hours 🏆 100+ Happy Clients Globally 🏆 All 5 Star Ratings & Reviews ✔️ 14+ years of Hands-on Experience I have 14+ years of experience in AI-powered SaaS Products, Banking/Financial solutions, Dashboards, Comnication platforms, VoIP, Telephonic, IVR Systems, and AI voice agent and platform development, working with global clients including Startups, SMEs, and Enterprises. Completed a substantial number of projects, including SaaS platforms and MVPs addressing different business challenges through customized solutions. Also, I have good experience with video coding using Cursor, Windsurf, Cloude, and GitHub Copilot. 🥇AI 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬: ➤ AI SaaS Platforms ➤ AI Voice Agents & Chatbots ➤ OpenAI / GPT / LLM Integrations ➤ LangChain & RAG Systems ➤ Workflow Automation ➤ CRM & Business Platforms ➤ Multi-tenant SaaS Architecture ➤ REST APIs & Scalable Backend Systems 🥇𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬: ➤ React/NextJs, Redux/ReduxForm, Redux-saga/Redux-thunk ➤ Typescript, ES5/6/7, ESLint/TSLint ➤ Backbone.js, Ember, Meteor, Chart.js, HighChart.js ➤ Angular, Angular-cli ➤ Bundling - Webpack/Gulp ➤ UI Frameworks: Bootstrap, Material-UI, Ant-Design ➤ Blazor 🥇𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 ➤ Node.js, Express.js, NestJS, Python ➤C#, ASP.NET MVC, .NET Core, Blazor ➤ DB : MySQL, MongoDB, AWS DynamoDB, Azure Cosmos DB, PostgreSQL 🥇 𝐀𝐳𝐮𝐫𝐞 ➤Serverless, CloudFormation, Docker, Kubernetes ➤CI/CD pipelines build automation ➤Azure AD Integration ➤ Azure DevOps ➤Azure Event Hub ➤ Azure Functions ➤ App Insights ➤ Azure KeyVault ➤Azure Service Bus ➤Azure SqlServer ➤Cosmo DB ➤Azure Data Factory For over 6 years, I have worked as an integral member/lead in a lot of remote development teams and companies. During my career, I have had an opportunity to work in different domains like: ➤ Healthcare ➤ E-commerce ➤ Telecommunication ➤ Fintech and many more. Thank You

Hi, I’m Arjun 👋 — a full-stack web developer with 10+ years of experience helping startups and enterprises like Moneygram, Wipro and Mable. I specialize in building robust web applications, dashboards, SaaS products, and real-time systems using the latest in frontend, backend, cloud infrastructure, and AI-powered workflows. From high-impact internal tools to customer-facing platforms with millions of users, I bring a product-focused approach to every build, engineering solutions that are scalable, clean, and built to perform. 🔧 Core Stack & Specialties 🚀 Frontend Development - Angular, Vue.js, React (Next.js), Ionic - Tailwind CSS for modern, responsive UI - Electron.js for desktop and web hybrid apps - Server-Side Rendering (SSR) & Incremental Static Regeneration (ISR) 🔧 Backend & API Engineering - Node.js with TypeScript, NestJS, Express - RESTful and GraphQL APIs - Microservices architecture 🤖 AI & Smart Features - Integration with GPT-4, Claude 3, LangChain, Pinecone - Embedding search and Retrieval-Augmented Generation (RAG) workflows - AI chat interfaces and prompt engineering - MCP system creation ⚡ Real-Time & Cross-Platform Systems - Real-time communication with Socket.io and WebRTC - Event streaming and messaging via Kafka and RabbitMQ 🗄️ Databases & Data Management - PostgreSQL, MongoDB, Firebase, MySQL - AWS Dynamo DB ☁️ Cloud & DevOps - Cloud platforms: AWS, Vercel, DigitalOcean - Containerization with Docker - CI/CD pipelines using GitHub Actions ✨ Why Teams Work With Me - Proven experience delivering scalable apps used by millions - Product-first mindset with clean architecture and best practices - Hands-on with practical AI integrations (search, summarization, chatbots) - Fluent in async communication and remote team collaboration - End-to-end ownership across frontend, backend, and infra If you’re building a modern web product or integrating AI into your platform, let’s connect—I’d love to help you bring it to life.

I help businesses build secure, scalable web applications and APIs without unnecessary complexity or delays. I’m a Senior ASP.NET Core Developer with 8+ years of professional experience building enterprise applications across healthcare, e-commerce, CRM, retail, hospitality, education, travel, and other business domains. I work across the full development lifecycle—from architecture and development to API integration, database optimization, deployment, and production support. My core expertise is C#, ASP.NET Core, Web API, Angular, React, SQL Server, Entity Framework Core, and REST APIs. I also work with Clean Architecture, CQRS, MediatR, Microservices, authentication, payment gateways, and third-party API integrations. I have hands-on experience building healthcare systems and integrations involving EHR/EMR, HL7, FHIR, insurance eligibility, and external healthcare APIs. I have also integrated services such as Stripe, PayPal, Twilio, SendGrid, and other third-party platforms. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵 ✔ ASP.NET Core Web API & MVC development ✔ Angular & React full-stack applications ✔ REST API design and third-party API integration ✔ SQL Server, EF Core & Dapper ✔ Clean Architecture, CQRS & Microservices ✔ Authentication & authorization (JWT, OAuth, Identity) ✔ Stripe, PayPal and payment integrations ✔ Healthcare APIs, HL7, FHIR & EHR/EMR integrations ✔ Performance optimization, debugging & production support ✔ Azure, AWS, Docker and CI/CD I focus on writing clean, maintainable code and designing solutions that are secure, scalable, and easy to maintain. Whether you need a new application, API integration, existing system modernization, difficult bug fixed, or ongoing development support, I can help. Send me your requirements and I’ll explain how I would approach your project.

I have 9+ years of experience with Web Development using RubyonRails, React.js, Node.js, Angular, RESTful, Python/Django, CMS, Other JavaScript framework, Amazon Web Services, jQuery, AJAX, CSS, Bootstrap, Vue and have In-depth knowledge of CSS3, HTML5 and Ruby based frameworks. Specially Ruby on Rails. I having ability in testing frameworks such as ruby cucumber, Rspec. I've worked with various third party services such as AWS Server Hosting with load balancer, RDS, EC2 Instance, S3 bucket, Security group, Security Key, SES mail sending service, SNS push notification service, AWS cloudfront,Heroku server,DigitalOcean droplet, EngineYard etc. Domain expertise : Dashboard Food delivery SPA (Single Page App) Dating I've also worked with various payment gatways such as Stripe, Braintree, Chargify, Checkout Express. I use latest iterative approach (agile software development methodologies) to deliver sophisticated, reliable, cutting-edge for top quality solution. So, you will be able to see progress of development activity through "DAILY WORK UPDATE REPORT". What are major services I am providing? Rails Installation and Configurations. Gems Installation Web development in Rails, NodeJS using Agile, Scrum methodology. Custom Ruby scripts and development UI/UX design and development using HTML, CSS, Bootstrap, JavaScript, Jquery and Angular JS Deployment on Heroku, S3 Amazon or any other environment. I have done a major work with Google Maps. Google Location APIs. Stripe, Payp al checkout APIs. I have tried more than 100 of gems. I have worked in spree commerce, management systems, education systems, Api developments, Marketplace, Classified ad systems and social media projects. Additionally I am working on SEO and Digital marketing all well. On top of these, I am very fluent in English communication (Oral & Written) so you will not face any communication related issues when working with me.

I build production systems enterprises run their business on: a corporate travel booking platform integrating Amadeus GDS with airline, hotel, and car-rental suppliers for institutional clients, and AIWI Team — a multi-tenant HRMS/project SaaS I founded. In 15 years I've shipped across travel, HRMS, eCommerce, and real estate, and I still write code every day. Where I'm genuinely strong: - Travel & GDS systems — Amadeus, Sabre, Galileo, plus non-GDS suppliers (AeroCRS, Radixx, Nightsbridge, Avis/Europcar). Booking flows, fare handling, supplier aggregation, PCI-aware payment integration. - Enterprise integrations — NetSuite, SAP, Xero/QuickBooks, payment/SMS/email gateways, SSO (OAuth 2.0, SAML, Keycloak, Okta). - SaaS architecture — multi-tenancy, RBAC, audit trails, and compliance-aware design (GDPR, POPIA, PCI-DSS). - Modernization — Java 8→21 migrations, monolith→microservices on Spring Boot/Spring Cloud, AngularJS→Angular 17+ upgrades. Core stack: Java (8–21), Spring Boot/Cloud/Security, Hibernate, Angular, React, PostgreSQL/MySQL, Kafka, Redis, Elasticsearch. DevOps: AWS (EKS, ECS, Lambda, RDS), Docker, Kubernetes, Terraform, Jenkins/GitLab CI, Prometheus/Grafana. How I work: I'll tell you honestly if something is outside my depth, give estimates I can defend, and write code your next developer can maintain. Most of my client relationships run multi-year for that reason. If your project involves travel tech, complex integrations, or scaling a Java platform, send me a message — I'll give you a straight assessment before either of us commits.

🐇🎩 Building products is like magic: instead of rabbits, I pull working software out of requirement docs.✨ Top Rated Plus on Upwork, top 3% globally ⚡ WHAT YOU GET ▸ 12+ Full Stack Developer React Node | AI development | SaaS Developer | MERN stack ▸ 60+ delivered projects across AI SaaS, CRM systems, dashboards, automation platforms, healthcare, legal tech, real estate, e-commerce, trading software ▸ 15+ AI-powered SaaS MVPs, AI CRM systems, RAG tools, OCR/PDF processing, OpenAI and Claude integrations built from validation to launch ▸ 25+ scalable React, Next.js, Node.js, Python AI backend, PostgreSQL, Stripe, AWS, Docker builds, full technical ownership, secure architecture, production-ready delivery as a Full Stack AI SaaS Developer ⚡ ACHIEVEMENTS | CLIENT WINS FROM AI SAAS & FULL STACK DEVELOPMENT ▸ 26-day ROI recovery recruitment agency launched a Recruiting SaaS Platform with CRM automation, 2x faster candidate workflows ▸ 93% faster estimation construction business reduced quoting time from 8 hours to 30 minutes with a custom Construction Estimator Web App ▸ #4 Product of the Day legal tech founder launched an AI Legal Assistant, RAG-powered document search, OpenAI integration, AI workflow automation ▸ 5+ secure healthcare platforms med spa businesses improved provider/patient workflows with role-based access, admin dashboards, API integration ▸ 10+ CRM & trading systems replaced manual operations with custom CRM platforms, trading dashboards, reporting tools, scalable workflow automation ⚡As a Full stack AI SaaS developer I can support with: ▸ AI-powered SaaS MVPs, product validation ▸ AI agent workflow platforms, workflow automation system ▸ AI-powered Custom CRM system, platform ▸ AI-enabled admin dashboard, panel, machine learning ▸ Role-based workflow platform secure permissions ▸ Secure multi-user web application, scalable backend system ▸ Booking and scheduling platform service businesse ▸ Provider / patient workflow systems healthcare solution ▸ Multi-stage automation workflows complex processe ▸ RAG-powered document intelligence, search system ▸ LLM-powered data processing using openai, modern AI tool ▸ AI-assisted analytics, reporting ▸ OCR and PDF processing pipeline ▸ Rule-based insight engines ▸ Secure backend API development, Third-party API integration ▸ Multi-tenant SaaS platforms workspace isolation ▸ Dashboard, data visualization system ▸ HIPAA / GDPR-compliant platform ⚡ MY CORE STACK as a Full stack Web Developer | Full stack developer React Node | Full stack Developer AI React, Next.js, Node.js, Python, JavaScript, Supabase, PostgreSQL, MySQL, MongoDB, AWS, Docker, nginx, Stripe, AI tools like Openai, Claude, LangChain. I also work with laravel, PHP when a project requires a Full stack developer laravel or integration into an existing system. As a Full stack developer SaaS ( full stack developer ai ) I cover full product delivery: frontend, backend, infrastructure, APIs, and AI logic. I can work as a React developer, Front end developer, Backend developer, Web developer python, React web developer, Full stack web developer depending on the scope. On the frontend, I work with HTML, CSS 3, Tailwind CSS, Vue.js, Angular, Bootstrap for specific stacks or legacy support. For SaaS products, I often work with full stack node.js react development, building React and Node.js SaaS applications with dashboard, admin panel, and secure APIs. I also work as a Full stack developer node | Full stack developer node js, focusing on performance and scalable architecture. When AI is involved, I support projects as a python developer with Python AI backend development, including RAG systems, OCR pipelines, document processing, intelligent automation I also have experience working with mobile app development and can contribute as a React Native developer, building cross-platform apps, react native integrated with backend systems and APIs In addition, I've worked as a full stack developer shopify, wordpress developer workflows, python full stack developer, front end developer react, full stack developer php and niche integrations, including Lazada developer-related marketplaces, helping businesses extend their platforms with custom features, payments and automation. What sets me apart is product thinking. As a technical partner, cto-level contributor, I help define Software Architecture & Design, avoid unnecessary complexity, build solutions that are ready for real users. I also collaborate on web design, ui ux web design, ux designer, ui ux web designer workflows to ensure products are intuitive and easy to use. If you need full stack web development, full stack saas architecture, AI-powered features, reliable Full stack website developer, Full stack developer saas, Full stack AI SaaS developer, I can help you build and scale your product. 💬 Message me with your idea, I’ll share a relevant case, technical approach, clear estimate from a full stack developer.

Welcome to my page! 🙂 I am Andrew, but I’d prefer you’ll call me - your future developer😬 ✔️14+ years of professional development experience as Full stack developer ✔️40+ admin panel client portals delivered as React native App developer Full stack developer React Node ✔️50+ EU and US B2B clients served ✔️60+ SaaS platform, CRM system, dashboard product built ✔️130+ successfully completed project ✔️React Developer | Full Stack Developer ( Full stack developer AI ) expertise React Developer and Full Stack Developer who builds custom Web Application product for B2B clients, from interface to backend, production-ready solutions Most of my work is Full Stack Developer React Node delivery, where a Front end developer React , Node.js backend developer support one business workflow end to end As a Node.js Developer I own the REST API logic, authentication, roles and permissions, the data layer behind each product As a Web developer ( MERN stack ) I focus on practical Web Application Development that ships, scales, stays maintainable, with clean API Integration at the core As a React Developer I build Web Application interfaces with React.js, Next.js, TypeScript and Responsive UI , wired to live data through API Integration I deliver usable, fast interfaces As a Node.js Developer and Backend Developer I build the REST API layer, ExpressJS services, authentication, roles, permissions, payment flows, CRM integration, combining engineering expertise with UX Designer mindset to take each solution from interface to backend. Many clients come to me as a Node.js Developer when a frontend already exists but API, data model, the business logic need to be done right. As a Backend Developer I keep the Node.js layer predictable, documented, as a Node.js Developer I handle API Integration third-party services, database, frontend. A typical Full Stack Developer React Node project for me looks like this: a SaaS platform or internal business tool with a React frontend, Node.js backend, structured database and an admin workflow for the team behind it. On every Full Stack Developer React Node build I design the database structure, the REST API , the dashboards, the permissions model so the product holds up as it grows. This Full Stack Developer React Node approach keeps frontend, backend in one system. Hiring one Full Stack Developer React Node engineer also keeps the React Developer and Node.js Developer decisions consistent across the whole build I also work as a Directus Developer | Headless CMS Developer . On 20+ content-driven, data-heavy products I use Directus CMS, Strapi as a headless backend, which gives clients a clean admin panel and an API-ready foundation. As Directus Developer I model the data, set roles and permissions, connect a React frontend through REST API ; as a Strapi Developer I do the same on Strapi. Headless CMS work with Directus CMS pairs naturally with my React developer firebase, Node.js Developer delivery Stack: React, React.js, Next.js, Node.js, TypeScript, JavaScript on the application side; ExpressJS, REST API , API Integration on the service side; SQL, MySQL, MongoDB, Firebase, Supabase for data; Directus CMS | Strapi for headless content. Authentication, roles, permissions, payment flows, dashboards, data tables, filters, admin workflows are standard parts of how I deliver Web Application Development As a Web Developer and JavaScript Developer I write code the next developer can actually read and extend. Typical projects clients hire me for: SaaS platform development, CRM development, admin panel, marketplaces, booking website, lead generation website, dashboard, client portal, internal business tools, e-commerce platform, API-based Web Application work with workflow automation and business automation. Clients also find me under related searches that match my real stack ⚛️ React developer side: 8+ yrs exp. as a React Native Developer 8+ yrs React next js developer ( nextjs ) 30+ projects Full Stack Developer Supabase React 13K+ hrs Front-End Developer Full-Stac ⚙️ Full stack developer side: 10K+ profiles/day - Python Full Stack Developer 15+ AI integrations - Full Stack Developer AI 200+ API integrations - Full Stack Developer Shopify 32 mobile apps as a Full stack React Native Spring Boot 60+ SaaS & CRM builds as a Full Stack Node.js React 130+ projects - Senior Full Stack Developer 50+ B2B clients - Senior Full stack .net 🗄️ Backend developer side: Node.js Backend Developer for APIs, Back End Developer Node.js for logic, Python Developer for automation. 🔧Additional expertise: WordPress Developer , Mobile App Developer , Vue Angular, Strapi developer, Stripe , Agile Software Development. Industry: healthcare, beauty, ecommerce, fintech 💡If you need a React Developer | Full Stack Developer React Node engineer | Node.js Developer for a serious product, I can take it from architecture through release and support. Let's talk about your product and what it needs to do

I am a Senior Full‑Stack Web Developer with 7+ years of hands‑on experience building production web applications. I focus on shipping features that look great, feel smooth, and stay reliable under real usage. Comfortable owning the full cycle, from system design and API contracts to UI polish and deployment while collaborating closely with product and design. 🛠️ Specialized in JavaScript/TypeScript + Python, with strong experience in: 📍 Frontend: Angular (TypeScript), React, Next.js, RxJS/NgRx, component libraries, responsive UI, UI/UX, HTML5, CSS3/SCSS. 📍 Backend: Python (Django/DRF), REST APIs, auth/permissions, service-layer architecture, integrations (including Stripe). 📍 Databases & caching: PostgreSQL, Redis. 📍 DevOps: Docker, production deployments, environment-based configuration. 📍 Documentation: OpenAPI/Swagger (API schema & docs). 📂 In our collaboration, I’ll be responsible for: 🔹 Building robust front‑end and back‑end functionality end‑to‑end. 🔹 Designing scalable architecture (clean service layers, clear API contracts, optimized queries). 🔹 Delivering premium UI/UX with responsive layouts, accessibility-minded details, and polished states (loading/error/empty). 🔹 Integrating payments with Stripe (saved payment methods, Payment Intents/Setup Intents, 3DS/SCA flows, webhooks). 🔹 Estimating tasks clearly, shipping iteratively, and keeping code quality high (reviews, CI mindset, maintainable patterns). 🔹 Communicating proactively and keeping delivery predictable. I’m always up for learning, staying current with the ecosystem, and getting things done. Let’s build something great. 🚀

✅ 15+ years of overall programming experience. 🗃 50+ successfully completed projects on Upwork. 🎓 Master's degree in Applied Mathematics and Informatics. Specialize in: 💎 Web Development 💎 Desktop Development for Windows 💎 Mobile Development for iOS / Android / Cross-platform 💎 MS Dynamics 365 / Salesforce 💎 UI / UX Design 💎 VR & AR Development using Unreal Engine / Unity 3D 💎 Artificial Intelligence/Machine Learning 💎 Project / Product Management 💎 Technical Oversight / Solution Architecture Expert in: C#, JavaScript, TypeScript, MS SQL, MySQL, PostgreSQL, MongoDB, ADO.NET, Entity Framework, OData, WCF Services, SOAP, REST, ASP.NET, ASP.NET MVC, ASP.NET Core, WebAPI SignalR, WinForms, WPF, ClickOnce, WinServices, MSMQ, DirectX/OpenGL, 3D Graphics, HTML, CSS, JavaScript, JQuery, Angular, React, Blazor, Vue, ElasticSearch/Solr.NET/Lucene, Redis, Azure, AWS.