I am a Full Stack Developer with more than 12 years of experience building SaaS platforms, AI-powered applications, healthcare software, CRM systems, ERP solutions, enterprise web applications, MERN Stack applications, and MEAN Stack applications. As a Full Stack Developer, I specialize in React.js, Angular, Node.js, Express.js, MongoDB, Python, Django, Flask, FastAPI, Laravel, Java, Spring Boot, AWS, PostgreSQL, MySQL, Docker, Kubernetes, and modern cloud-native architectures. PROVEN TRACK RECORD ✅ Full Stack Developer with 36,000+ Upwork hours ✅ $900K+ earnings ✅ 100% Job Success Score ✅ Expert-Vetted Badge ✅ MERN Stack & MEAN Stack Development Over the years, I have worked as a Full Stack Developer building scalable SaaS platforms, healthcare applications, enterprise dashboards, marketplaces, HRMS systems, inventory management systems, CRM platforms, ERP software, and AI-powered applications. Many clients hire me as a Full Stack Developer to take products from idea to production with clean architecture, scalable code, and long-term maintainability. As a Full Stack Developer, I build modern web applications using React.js, Next.js, Angular, TypeScript, JavaScript, Tailwind CSS, and Material UI. I also specialize in MERN Stack Development and MEAN Stack Development, building scalable applications using MongoDB, Express.js, React.js or Angular, and Node.js. As a Full Stack Developer, I develop secure backend systems, REST APIs, GraphQL services, microservices, automation platforms, AI-powered applications, and cloud-native solutions using Node.js, Express.js, Python, Django, Flask, FastAPI, Laravel, and Java Spring Boot. Healthcare software development is one of my strongest areas of expertise. As a Full Stack Developer, I have built HIPAA-compliant healthcare applications, Electronic Medical Records (EMR), Electronic Health Records (EHR), Patient Portals, Telemedicine Platforms, Medical Billing Systems, Healthcare Dashboards, and AI-powered healthcare solutions using AWS HealthLake, DynamoDB, and modern cloud technologies. I also work as an AI Full Stack Developer, integrating OpenAI, Claude, Retrieval-Augmented Generation (RAG), intelligent document processing, AI chatbots, workflow automation, and custom LLM-based solutions into modern SaaS platforms and enterprise applications. Whether you need a Full Stack Developer for a SaaS platform, a MERN Stack Developer, a MEAN Stack Developer, healthcare software, CRM, ERP, AI-powered solutions, or enterprise web applications, I can help transform your idea into a secure, scalable, and production-ready product. ### Technical Skills #### 🧠 Frontend Development Full Stack Development MERN Stack Development MEAN Stack Development React.js Next.js Angular (2+ to Latest) JavaScript (ES6+) TypeScript RxJS HTML5 CSS3 SCSS Tailwind CSS Material UI (MUI) Angular Material Kendo UI Responsive Web Design State Management (NgRx, Redux, Context API) REST API Integration GraphQL Integration Forms, Routing, Authentication & Validation Jest Karma Jasmine Cypress Protractor Puppeteer #### 🤖 AI & Automation OpenAI API Claude API AI Integration Retrieval-Augmented Generation (RAG) AI Chatbots Intelligent Document Processing Workflow Automation Prompt Engineering #### ⚙️ Backend & Full Stack Development Node.js Express.js NestJS Python Django Flask FastAPI PHP Laravel Java Spring Boot REST API Development GraphQL Microservices Event-Driven Architecture WebSockets SocketIO ETL Pipelines Test-Driven Development (TDD) #### 🗄️ Databases PostgreSQL MySQL MongoDB SQL Server Firebase Firestore DynamoDB Amazon HealthLake #### ☁️ Cloud & DevOps AWS (EC2, S3, Lambda, DynamoDB) Microsoft Azure Google Cloud Platform (GCP) Docker Kubernetes CI/CD Pipelines Azure DevOps DigitalOcean #### 🤖 AI & Automation OpenAI API Claude API AI Integration Retrieval-Augmented Generation (RAG) AI Chatbots Intelligent Document Processing Workflow Automation Prompt Engineering #### 🛠️ Tools Git GitHub GitLab Bitbucket Jira Trello Asana Azure DevOps 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full Stack Developer | Full Stack SaaS Developer | SaaS Application Development | .NET Developer | .NET Core Developer | React Developer | Node.js Developer | Full Stack Developer | Angular Developer | Full Stack Developer | Next.js Developer | NestJS Developer | Full MERN Stack Developer | Full MEAN Stack Developer | Full PERN Stack Developer | Full Stack Developer | MongoDB | Cloud Engineer | Full Stack Developer | API Developer | API Integration | API Development | Azure | AWS | Google Cloud | REST API | Microservices | DevOps | CI/CD | GraphQL | AI Specialist | Full Stack Developer | AI-Integrated Solutions | ChatGPT

I help businesses build, fix, and scale full-stack web applications using .NET, Azure, and modern JavaScript frameworks Angular and React without needing to hire separate backend, cloud, and frontend engineers. ✔ 18+ years of enterprise software development ✔ 60+ projects delivered | 9000+ hours worked on Upwork ✔ Azure Certified (Developer Associate + Cosmos DB Specialty) ✔ Trusted by international clients including FDM, Danx, and Atea ✔ AI-assisted development (Claude/Copilot) for faster delivery with strong test coverage ⭐ WHAT CLIENTS SAY ✔ "Yasir did a great job jumping in and getting started right away... open to feedback and suggestions during code reviews." ✔ "Yasir joined us when we needed a developer immediately, he quickly understands the requirements and did quality work." ✔ "Very skilled in software development and architecture, a good communicator... a pleasure to work with." 💡 HOW I CAN HELP YOU ✔ Build scalable ASP.NET Core Web APIs & microservices ✔ Design and deploy secure Azure cloud solutions (Functions, App Services, Cosmos DB) ✔ Develop full-stack apps with Angular, React, Next.js, or Blazor ✔ Upgrade legacy .NET Framework / Web Forms apps to modern architecture ✔ Fix critical production issues and improve performance ✔ Integrate third-party APIs and automate workflows with AI tools 🛠 CORE TECH STACK ✔ C#, ASP.NET Core, .NET Web APIs, .NET 8/9 ✔ Azure (Functions, App Services, Storage, Cosmos DB, DevOps/CI-CD) ✔ Angular, React, Next.js, Blazor (WASM & Server), TypeScript ✔ SQL Server, Entity Framework, REST APIs ✔ Git, Agile, AI-assisted development workflows ☁️ CERTIFICATIONS ✔ Microsoft Certified: Azure Developer Associate ✔ Microsoft Certified: Azure Fundamentals ✔ Microsoft Certified: Azure Cosmos DB Developer Specialty I am available to start quickly and can work independently or embed with your existing team. Whether it's a new build, a legacy upgrade, or an urgent fix, invite me to your job and let's get started.

🏆𝐓𝐎𝐏 𝐑𝐀𝐓𝐄𝐃 𝐅𝐑𝐄𝐄𝐋𝐀𝐍𝐂𝐄𝐑 👋 Hello! I'm 𝑽𝒊𝒔𝒉𝒂𝒍, 𝐲𝐨𝐮𝐫 𝐠𝐨-𝐭𝐨 𝐀𝐈 𝐄𝐱𝐩𝐞𝐫𝐭 𝐚𝐧𝐝 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 having over 8+ 𝘆𝗲𝗮𝗿𝘀 of expertise 🎯 𝐖𝐇𝐀𝐓 𝐈 𝐂𝐀𝐍 𝐃𝐎 𝐅𝐎𝐑 𝐘𝐎𝐔 ======================== 🔹 𝐀𝐈 & 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 : Designing intelligent AI Agents and Chatbots.Custom AI model integration 🔹 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐖𝐞𝐛 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Building scalable, responsive web applications using React, Next.js, Node.js, and Python. 🔹 𝐂𝐮𝐬𝐭𝐨𝐦 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 : Developing tailored AI-powered solutions to meet your specific business needs. 🛠️ 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐈𝐄𝐒 𝐈 𝐔𝐒𝐄 ======================== 🔹𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 : React, Next.js, HTML, CSS, JavaScript 🔹𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 : Node.js, Express, Python 🔹 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 : React Native & Flutter 🔹𝐀𝐈 & 𝐌𝐋 : TensorFlow, PyTorch, OpenAI APIs, NLP libraries 🔹𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 : MongoDB, PostgreSQL, MySQL 🔹𝐓𝐨𝐨𝐥𝐬 & 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 : Docker, AWS, Heroku, Git ✨ 𝐖𝐇𝐘 𝐂𝐇𝐎𝐎𝐒𝐄 𝐌𝐄 ? ==================== 🏅 𝐁𝐞𝐬𝐭 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐖𝐨𝐫𝐤. 💯 𝟏𝟎𝟎% 𝐂𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧. ✅ 𝐐𝐮𝐢𝐜𝐤 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐞 ⏳ 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐨𝐧 𝐘𝐨𝐮𝐫 𝐒𝐜𝐡𝐞𝐝𝐮𝐥𝐞 🕐 𝐎𝐧-𝐭𝐢𝐦𝐞 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐲 🤝 𝐒𝐮𝐩𝐩𝐨𝐫𝐭 𝐚𝐟𝐭𝐞𝐫 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐢𝐨𝐧 𝐨𝐟 𝐭𝐡𝐞 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 💬 𝐋𝐞𝐭’𝐬 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞 𝐭𝐨 𝐛𝐫𝐢𝐧𝐠 𝐲𝐨𝐮𝐫 𝐯𝐢𝐬𝐢𝐨𝐧 𝐭𝐨 𝐥𝐢𝐟𝐞! 𝐃𝐫𝐨𝐩 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞, 𝐚𝐧𝐝 𝐥𝐞𝐭’𝐬 𝐛𝐮𝐢𝐥𝐝 𝐬𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐚𝐦𝐚𝐳𝐢𝐧𝐠 𝐭𝐨𝐠𝐞𝐭𝐡𝐞𝐫. #AI App Developer #Full Stack Developer #React Developer #Angular Developer #Next Developer

With over 18 Years experience on Open Source Web Development added with 8 Years extensive development on Cordova with HTML5, CSS3 and Angular I can make your Enterprise Level Applications shine with principle objectives and strategies you had in your mind while proposing new solutions. I spent most of my time on PHP MySQL until MEAN stack started picking up and has been riding the bandwagon since 8 years or so exclusively with it. Since beginning of 2017 I have been doing Angular 2|4 with Typescript and things have been keeping me busy since then. If you have received a job application from me then you must be having something serious and interesting going on and if that's the case then I am your guy to get you there.

I am a Full-Stack Developer with 7+ years of experience specializing in MEAN Stack development and modern JavaScript technologies. I help startups, agencies, and businesses build scalable web applications, SaaS products, business portals, and custom software solutions with a strong focus on performance, security, and maintainability. My expertise spans the complete development lifecycle—from architecture and database design to frontend development, backend services, API integrations, deployment, and ongoing maintenance. I have experience working with distributed teams and international clients, delivering high-quality solutions that solve real business challenges. Core Technologies Node.js & Express.js Angular & TypeScript MongoDB & MySQL JavaScript (ES6+), HTML5, CSS3 RESTful APIs & Third-Party Integrations JWT Authentication & Role-Based Access Control Payment Gateway Integration Supabase, Firebase, Twilio & Resend Git, Agile Development & CI/CD Services Custom Web Application Development SaaS Product Development CRM & ERP Systems Admin Dashboards & Business Portals Marketplace & Lead Generation Platforms API Development & Integration Database Design & Performance Optimization Application Maintenance & Feature Enhancement I believe successful software is built on clean architecture, efficient code, and clear communication. My approach is to understand business objectives first and then develop scalable solutions that are reliable, maintainable, and ready for future growth. If you're looking for a dependable Full-Stack Developer who can contribute from planning and development to deployment and long-term support, I would be happy to collaborate on your project. Thanks, Niharika Porwal

Frontend Engineer | Angular • React • Vue • Ionic • Hybrid Apps. With 10+ years of experience in modern frontend development, I specialize in building web and mobile applications that are fast, scalable, and user-focused. I bring strong command over Angular (all versions), Vue.js, and hybrid mobile frameworks like Ionic with Cordova/Capacitor, delivering seamless experiences across devices. Over the years, I’ve led and contributed to the entire product lifecycle—from idea to launch—across a wide range of domains, startups, and enterprise-level applications. Whether you're starting from scratch or improving an existing platform, I bring both frontend precision and backend integration experience to the table. 💡 My Core Expertise Includes: - JavaScript / TypeScript - Angular / AngularJS / Vue.js / React.js - State Management: NgRx, Vuex - Mobile App Dev: Ionic (with Cordova & Capacitor) for iOS & Android - Backend Skills: PHP, Laravel, MySQL - UI/UX Tools: Figma to HTML, PSD to HTML - Web Standards: HTML5, CSS3, SASS/SCSS, BEM, Bootstrap, TailwindCSS - Version Control: Git & GitHub/GitLab/Bitbacket - Project Types: Websites, PWAs, Dashboards, Admin Panels, Mobile Apps I take pride in clean code, reusable components, and thoughtful UI design—delivering robust and user-friendly applications. ✅ Why Work With Me? - 10+ years of hands-on experience - Pixel-perfect UI development - Strong problem-solving & architectural thinking - On-time delivery with clean Git workflows - Proven success across startups and enterprise apps

A Fast Learning Developer with more than 7 years of experience working as web app developer and mobile developer, Highly skilled in Javascript Frameworks and libraries, 6+ years working with Angular, React and Vue, 2+ Years working with mobile developer tools and frameworks like ionic and Flutter, I really like to learn new technologies and apply them on my work and personal projects

🌟 Top Rated Plus Freelancer 💎 7+ years of experience 👑 100% Job Success ⭐⭐⭐⭐⭐ "Kishan does outstanding work. His expertise, dedication, and passion for software development have significantly contributed to the project's success, and we were very pleased with the results. Kishan's ability to quickly grasp complex requirements, and write clean, well-structured code has been truly impressive. His attention to detail and proactive communication have greatly enhanced the quality of the final product and made the collaboration seamless." - Spokbee Team ⭐⭐⭐⭐⭐ ✨Expert in : PHP, JavaScript, HTML, CSS, Bootstrap, Laravel, React.js, Node.js, Vue.js, Next.js, Three.js, Angular.js, Typescript, MySQL, MongoDB, PostgreSQL, Figma, Adobe XD, PhotoShop, WordPress, React Native, Flutter, Android, iOS, Swift, Kotlin, Objective C. 🎖Experience: Developed and designed over 30 SaaS platforms, 200+ e-commerce sites, 50+ mobile applications, 250+ landing pages ✅ Have any questions? Feel free to contact me! I'll cut straight to the point on your project!

Most engineers want to build from a blank page. I do the harder, more valuable thing: I step into your existing SaaS product where the codebase already exists, the business logic matters, and real users depend on it. That's the work I've done again and again on Upwork: redesigning a client portal, enhancing a CRM, adding features to live applications, taking over and stabilizing inherited codebases, and supporting enterprise. NET systems in production. Clients keep me around because I understand the product first and write code that keeps growing after I'm gone. I have 10+ years across React, Next.js, TypeScript, Node.js, and C#/.NET, full stack from UI to API to database to deployment. I also build AI features into existing products OpenAI/LLM API integration, chatbots, and workflow automation so the AI actually fits your app instead of bolting on awkwardly. I can help you: Add features to an existing SaaS, CRM, portal, or dashboard Integrate AI/LLM capabilities into a product you already have Take over and stabilize an inherited or legacy codebase (React, Angular, .NET) Fix bugs, unstable workflows, and performance issues Build REST APIs, backend services, and third-party integrations (Stripe, CRMs, webhooks) Clients describe my work as collaborative, quality-focused, reliable, and easy to communicate with. If you have a product that needs to move forward carefully and steadily, that's exactly what I do. Core stack: React, Next.js, TypeScript, Node.js, C#/.NET, ASP.NET Core, PostgreSQL, SQL Server, REST APIs, AWS, OpenAI/LLM APIs.

Experienced Full Stack Developer and Database Administrator specializing in Microsoft technologies and comprehensive database solutions (MySQL, PostgreSQL, MS SQL Server). I deliver end-to-end solutions combining robust backend architecture with responsive frontend development and optimized database performance 𝐊𝐞𝐲 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 Full-stack development with .NET Core, ASP.NET, VB.NET, C#, JavaScript, Angular, React & GIT 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐝𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐚𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: MySQL (8.0/5.7/5.6) optimization and maintenance PostgreSQL setup, replication, and performance tuning MS SQL Server management, including high availability and DR Database migration and performance optimization (achieving up to 10x improvement) REST API development and system integration Azure cloud deployment and infrastructure management 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐭𝐚𝐜𝐤 Backend: .NET Core, ASP.NET, C#, Web API Frontend: Angular, JavaScript 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: MySQL: Replication, backup/recovery, query optimization PostgreSQL: Partitioning, indexing, PL/pgSQL MS SQL Server: SSIS, SSRS, performance tuning I specialize in delivering scalable solutions, from complete system development to complex database architecture and performance tuning. Whether you need a new application built from scratch, a database migration, or system optimization, I offer the technical expertise to ensure your project's success. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: .NET Core| ASP.NET| C#| Full Stack Development| Angular| React| TypeScript| MySQL, PostgreSQL|SQL Server| Database Migration| Query Optimization| SQL Server Administration| Cloud Infrastructure| Microsoft Azure | REST API | Software Architecture| Clean Architecture, Entity Framework| System Optimization| High Availability| SSIS| SSRS| and CI/CD automation. 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐟𝐨𝐫 𝐛𝐨𝐭𝐡 𝐬𝐡𝐨𝐫𝐭-𝐭𝐞𝐫𝐦 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐚𝐧𝐝 𝐥𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧. 𝐋𝐞𝐭'𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐚𝐜𝐡𝐢𝐞𝐯𝐞 𝐲𝐨𝐮𝐫 𝐨𝐛𝐣𝐞𝐜𝐭𝐢𝐯𝐞𝐬.