Senior Full Stack Engineer with 6+ years of production experience building SaaS platforms, web apps, and APIs across the .NET / Angular / React / Azure stack. Top Rated on Upwork with a 100% Job Success Score across 28+ contracts. I've also been expanding into Python (FastAPI / Flask) and applied AI/ML — adding LLM features, RAG, and data pipelines to existing products. It's important to me to build long-term relationships with clients, so I'm primarily looking for long-term projects. My skills include: ✔️ Back-end: .NET 8 / C#, ASP.NET Core MVC/MVVM, Web API, SignalR, Razor, WPF, LINQ ✔️ Front-end: Angular, React, TypeScript, JavaScript, jQuery, HTML5, CSS, Bootstrap, Tailwind ✔️ Python: FastAPI, Flask, Pandas, NumPy, scikit-learn ✔️ AI / ML: OpenAI API, LangChain, LLM integration, RAG basics, prompt engineering ✔️ Cloud: Microsoft Azure — App Service, Azure Functions, Azure SQL, Cosmos DB, Azure DevOps ✔️ ORM: Entity Framework Core, Dapper ✔️ Database: SQL Server, MongoDB, PostgreSQL, MySQL, Redis ✔️ Architecture: REST API design, microservices, real-time (SignalR / WebSockets), auth (OAuth / JWT), payment integration (Stripe) ✔️ Tooling: Visual Studio, VS Code, Git, Azure DevOps, Docker ✔️ Process: Agile, Scrum, Kanban Expertise: ✔️ Web Development — REST Web API, ASP.NET Core, Angular, React ✔️ Cloud & Backend — Azure App Service, Web Servicer, Functions, SQL, AKS, Entra ID ✔️ Python + AI Add-ons — Flask / FastAPI services, OpenAI / LangChain integration, light data pipelines Send a message with your goal in two sentences, or book a consultation and we'll scope it together.

I am a Full Stack Developer specializing in .NET Core, Angular, and React, with over 8 years of experience delivering high-performing, scalable, and secure web applications. I have worked on projects ranging from enterprise SaaS solutions, CRM systems, eCommerce platforms, to API integrations. My focus is always on writing clean, maintainable code and delivering results that help businesses grow. Core Expertise: ✅ Frontend: Angular, React, NextJs, TypeScript, JavaScript, HTML5, CSS3 ✅ Backend: ASP.NET Core, Web API, C#, Entity Framework ✅ Database: SQL Server, MySQL ✅ Cloud & Tools: Azure, Git, REST APIs, Agile methodology Why clients hire me? ✅ Strong problem-solving and debugging skills ✅ Ability to modernize Angular apps and React Apps ✅ Proven track record of delivering projects on time & within budget ✅ Clear communication & long-term collaboration mindset 🚀 Let’s connect to discuss how I can bring value to your project.

I am a full-stack developer passionate about JavaScript React, React Native, Angular, NodeJS Development and with a big experience specially Angular and React Native. Highly experienced in building a mobile responsive, web-based user interface using React.js also Strong experience in App development and creation of large, sophisticated and extremely scalable applications. My experience allows me to achieve the highest production standards. I pay attention to details, I'm diplomatic and possess superb communication skills. Backend development: * Node.js * MySQL/MariaDB * Firebase * .NET Frontend development: * Angular, TypeScript, RxJs, React, React Native * Javascript (ES6, npm, Underscore/Lodash, CanvasJS, jQuery) * Flow * CSS * HTML5 * Bootstrap, UI-Bootstrap APIs: * API and microservice driven architecture * PaypaI, Stripe and many other payment processors * Instagram * OAuth (Facebook, Google, etc.) * Twilio Source code management * Git * Github, Bitbucket, Gitlab Specialties: * Cross-platform mobile applications * Single page applications I speak and write good English. I'll be able to communicate with you clearly and available for voice calls as needed. I look forward to work with you!

If you want “no rework” engineering – I’m a Senior Full Stack Developer (React/Node.js/Angular) who delivers with ownership, speed, and quality ✅ 𝟭𝟮,𝟎𝟎𝟎+ 𝐡𝐨𝐮𝐫𝐬 𝐰𝐨𝐫𝐤𝐞𝐝 across real-world production systems ✅ 𝟓𝟎+ 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 delivered across SaaS, Web Apps, and Business Platforms ✅ 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 on Upwork Hey, I’m 𝗥𝗮𝗷𝗮𝘁 – a business-focused Full Stack Developer I help startups and companies turn ideas into scalable, production-ready web applications – fast, clean, and without unnecessary complexity I work across the full stack daily – building React / Next.js frontends and Node.js/API-driven backends, ensuring everything works together seamlessly I don’t just write code – I take full ownership from idea → architecture → development → deployment ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 (Full Stack Developer - MERN & Beyond) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js, TypeScript, Solidity, Solana, PHP (Laravel, Symfony, CodeIgniter, Yii), MongoDB, PostgreSQL ▸ 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js, Angular, Vue ▸ 𝗨𝗜/𝗨𝗫: Responsive Design, Material UI, Chakra UI, Pixel-perfect Figma to Code ▸ 𝗔𝗣𝗜𝘀: REST, GraphQL, OAuth2, JWT, Third-party integrations ▸ 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗧𝗼𝗼𝗹𝘀: Git, CI/CD, Vercel, Cloud deployments (AWS, Azure) ▸ 𝗖𝗠𝗦: Headless CMS (Sanity, Contentful), Custom CMS I deliver end-to-end web applications – combining clean frontend experience with reliable backend systems On the backend, I build secure APIs, authentication systems, integrations, and scalable architectures On the frontend, I create fast, responsive, and user-focused interfaces using modern frameworks When a project requires full ownership, I step in as a true full stack partner, ensuring everything is scalable, maintainable, and production-ready ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 𝐌𝐲 𝐀𝐩𝐩𝐫𝐨𝐚𝐜𝐡 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ MVP → Scale Mindset I build fast MVPs that are structured to scale – no messy rewrites later ▸ 2-Week Sprint Execution Clear progress, regular updates, and predictable delivery ▸ Performance First Optimized apps with SSR, code splitting, caching, and efficient APIs ▸ Business-Oriented Development Every feature is aligned with outcomes – not just code ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐀𝐜𝐫𝐨𝐬𝐬 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ SaaS Platforms (multi-tenant, subscriptions, dashboards) ▸ eCommerce & Marketplaces (payments, orders, performance optimization) ▸ CRM & Admin Systems (automation, reporting, internal tools) ▸ High-performance Web Apps (SEO-friendly, scalable architectures) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ SaaS & B2B Platforms ▸ eCommerce ▸ Healthcare ▸ Education ▸ Media & Content ▸ Startups & Enterprises I also work on performance optimization, API integrations, database design, and long-term system stability – ensuring your product runs smoothly even at scale ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 𝐋𝐄𝐓’𝐒 𝐂𝐎𝐍𝐍𝐄𝐂𝐓 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you need a reliable full stack developer (React/Node.js/Angular) who can take ownership and deliver without back-and-forth – let’s talk No overpromises. Just clean execution #FullStackDeveloper 🧠 #JavaScript ⚡ #TypeScript 🔹 #React ⚛️ #NextJS 🖥️ #NodeJS 🌲 🔌 #VueJS 🌱 #Angular #TailwindCSS 🎨 #Bootstrap 🖌️ #Microservices 🧩 #PHP #Laravel #Symfony #CodeIgniter #Yii #MySQL #PostgreSQL #MongoDB #RESTAPI 🌐 #GraphQL 🔍 #APIIntegration 🔌 #JWT #OAuth2 #StripeIntegration 💳 #eCommerce 🛒 #SaaS 💼 #CRM #Solana #Solidity #Blockchain #Web3 #Wallet Integration #dApp #decentralized #ResponsiveDesign 📱 #PerformanceOptimization ⚡ #ScalableArchitecture 🏗️ #MVPDevelopment 🔧 #StartupPartner 🚀 #HighQualityDelivery 🏆 #DigitalProducts 🌐 #Replit #Lovable #Supabase #Firebase

I'm a senior full-stack engineer with 9+ years of experience delivering production-grade applications in Angular and .NET for clients across travel, maritime, and tax industries. My work spans the full lifecycle — architecture, development, DevOps, and long-term maintenance. Recent engagements include an Angular SSR + .NET platform for a travel/OTA business (resolving memory leaks, bot mitigation, and hydration performance issues), an air-gapped network monitoring system built on .NET 10 and deployed via Docker/WSL, and a multi-tenant venue management SaaS with custom booking logic. Technical expertise: ✅ Angular (all versions), TypeScript, RxJS, Signals/NgRx ✅ .NET Framework through .NET 10, C#, ASP.NET, Web API ✅ SQL Server, MongoDB, Entity Framework ✅ Azure, Docker, CI/CD (GitHub Actions, Azure DevOps) ✅ Application security practices (OWASP, dependency scanning) I've led development teams, mentored engineers, and managed client relationships end-to-end as an independent contractor. I focus on clean architecture, maintainable code, and systems that hold up under real production load. Available for both project-based work and ongoing support engagements. Let's discuss your requirements.

MEAN & MERN Stack Developer — Production-Ready Web Applications Looking for a MEAN or MERN developer who builds applications that are stable, secure, and scalable from day one? I help startups and businesses turn ideas into real, production-ready web platforms, not fragile demos. I’m Asad, a Top Rated Full-Stack JavaScript Developer with strong experience in MEAN (MongoDB, Express, Angular, Node.js) and MERN (MongoDB, Express, React, Node.js) stacks. My approach focuses on clean architecture, predictable performance, and codebases that are easy to extend as your product grows. What I build - MEAN & MERN web applications - Startup MVPs and SaaS platforms - Authentication & authorization systems - JWT, role-based access - Secure API design - Admin dashboards & internal tools - REST APIs & backend systems Core technologies - Frontend: Angular, React - Backend: Node.js, Express.js - Database: MongoDB - Authentication: JWT, OAuth - Deployment: AWS, Vercel Clients typically come to me when they: - Need a reliable MEAN/MERN expert, not a generalist - Want a backend that won’t break under real usage - Care about maintainable code and long-term scalability - Have existing code that needs cleanup, refactoring, or extension As a Top Rated freelancer, I value clear scope, realistic delivery plans, and clean execution. I collaborate closely with product owners, follow established coding standards, and build systems that future developers can easily understand. If you need a MEAN or MERN developer who delivers stable, production-quality results, message me to discuss your project.

I am a Senior Full-Stack Engineer with extensive experience in building robust, scalable, and maintainable software solutions. Over 8 years in full-stack development, I help clients: ✨ What I Deliver Application Development & Maintenance ✔ Build robust, scalable, and maintainable applications ✔ Apply clean code and best practices for long-term reliability Issue Resolution & Performance ✔ Quickly identify and fix bugs ✔ Ensure smooth performance and high-quality user experience Rapid MVP & Time-to-Market ✔ Launch rapid MVPs to validate ideas ✔ Accelerate development cycles and reduce time-to-market ✨ Core Skills & Expertise Backend Development ✔ Java (17/21), Spring Boot, Hibernate, Maven, Gradle ✔ RESTful APIs & Microservice architecture ✔ Clean code principles & scalable design ✔ Keycloak authentication Frontend Development ✔ Angular, TypeScript, JavaScript, HTML/CSS ✔ Next.js for modern web applications Database & Data Layer ✔ PostgreSQL, MySQL, MongoDB Testing & Quality Assurance ✔ JUnit, Mockito, jtest, Jasmine, Selenium, Cypress, Postman DevOps & Cloud Infrastructure ✔ Git, GitHub/GitLab ✔ Docker, Kubernetes ✔ AWS (EC2, S3, Lambda, RDS, CloudWatch, IAM) ✔ Terraform for Infrastructure as Code (IaC) Project Management & Collaboration ✔ Agile/Scrum methodology ✔ Jira, Confluence 💡 I am also exploring AI-driven solutions to bring smarter, more efficient features to the applications I build.

If your .NET system is slow, breaking under load, or needs a React or Node.js frontend built right - I have solved that exact problem 50+ times. 50+ completed jobs. 100% Job Success Score. $100K+ earned. Top Rated Plus since 2021. You work directly with me - not a team you've never met. ──────────────────────────────── WHAT I DELIVER ──────────────────────────────── ✔ ASP.NET Core & C# backend - enterprise APIs, microservices, clean architecture ✔ React.js & Next.js frontend - SaaS dashboards, portals, admin panels ✔ Angular development - v6 to v18, enterprise dashboards, complex SPAs ✔ Node.js backend - REST APIs, Express.js, real-time systems, WebSockets ✔ FastAPI & Python backend - async APIs, AI integrations, data pipelines ✔ .NET modernization - legacy .NET Framework to ASP.NET Core cloud- native ✔ Azure & AWS cloud - App Services, Functions, EC2, S3, Lambda, DevOps ✔ Full stack .NET + React - end to end, architecture to production ✔ SaaS development - multi-tenant, subscriptions, RBAC, billing systems ✔ AI/ML integration - OpenAI API, Python, TensorFlow, FastAPI, Scikit-learn ✔ Database architecture - SQL Server, PostgreSQL, MongoDB, CosmosDB, Redis ✔ CI/CD pipelines - Azure DevOps, GitHub Actions, Docker, Kubernetes ✔ Third party integrations - Stripe, Salesforce, DocuSign, Twilio, Google APIs ──────────────────────────────── LIVE PROJECTS DELIVERED ──────────────────────────────── ✔ Immigration Consultation Marketplace - multi-role platform with .NET + Angular + React, full stack architecture ✔ Ontrack Careers - AI mentorship platform with booking engine, scheduling, and OpenAI integration ✔ Rose POS - enterprise restaurant kiosk with shift-based cash tracking and Stripe payment flows ✔ Raprod - B2B manufacturing marketplace with real-time bidding engine, React + Node.js ✔ Ninja DAM - multi-user digital asset management SaaS, React + Node.js + AWS ✔ Acemmi - AI interview coaching platform with scoring pipeline, OpenAI API + React + Node.js ✔ Promo Standards SOAP API - enterprise-grade integration, .NET + C#, 500+ hours delivered ✔ Stripe Payment Integration - .NET MAUI enterprise mobile application, end to end ──────────────────────────────── TECH STACK ──────────────────────────────── BACKEND C# · ASP.NET Core · .NET Core · .NET 8 · Web API · Entity Framework · Node.js · Express.js · FastAPI · Python · GraphQL · Microservices · SignalR FRONTEND React.js · Next.js · Angular v6–v18 · TypeScript · JavaScript ES6+ · Tailwind CSS · Redux · Material UI DATABASE SQL Server · PostgreSQL · MongoDB · MySQL · CosmosDB · DynamoDB · Redis CLOUD & DEVOPS Azure App Services · Azure Functions · Azure DevOps · AWS EC2 · S3 · Lambda · RDS · Docker · Kubernetes · CI/CD · GitHub Actions · Linux AI & ML Python · TensorFlow · Scikit-learn · FastAPI · OpenAI API · Predictive Analytics INTEGRATIONS Stripe · Salesforce · DocuSign · Twilio · SendGrid · Google APIs · SOAP APIs · Webhooks · REST APIs SPECIALIZATIONS ASP.NET Core Developer · C# Developer · .NET Core Developer · Full Stack .NET Developer · React Developer · Angular Developer · Node.js Developer · Azure Developer · SQL Server Developer · Entity Framework Developer · SaaS Developer · Enterprise Developer · Legacy Migration Developer · Microservices Developer · REST API Developer ──────────────────────────────── WHY CLIENTS CHOOSE ME ──────────────────────────────── ✔ 100% Job Success Score - 49 completed jobs, Top Rated since 2021 ✔ Proactive communication at every milestone - clients never chase me for updates ✔ I find the real problem, not just the reported one - root cause fixes that prevent future issues ✔ Architecture decisions that save expensive rewrites at scale ✔ Available and responsive - fast turnaround, clear timelines, no surprises ✔ You work directly with me - no handoffs, no juniors ──────────────────────────────── READY TO START? ──────────────────────────────── Share your project. I'll review it and tell you exactly what I'd build, how long it takes, and what it costs. Senior .NET Developer · Full Stack .NET Developer · ASP.NET Core Developer · ASP.NET MVC Developer · C# Developer · .NET Core Developer · .NET Backend Developer · REST API Developer · Microservices Developer · Enterprise Application Developer · SaaS Developer · Azure .NET Developer · Cloud Application Developer · Legacy Migration Developer

Expert in full-stack web application development, Azure Bot Framework, Microsoft Teams apps, legacy application modernization, and long-term product support using ASP.NET Core, C#, Blazor, MVC, Web API, React, Angular, and modern cloud technologies. 𝐋𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐣𝐮𝐬𝐭 𝐚 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫? Hi, I'm Arslan Zafar—a Senior Full Stack .NET Developer focused on building secure, scalable, and high-performance applications that solve real business problems. With 8+ years of experience, including work with organizations like TCS, T-Mobile, and CBA, I bridge the gap between complex business requirements and clean, scalable technical solutions. ASP.NET MVC and legacy modernization Some of my most complex ASP.NET MVC work has been in defence and industrial sectors. I modernized a legacy web platform for a company managing high-uptime naval fleet assets — warships that cannot afford downtime. The ASP.NET MVC rebuild enabled accurate asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS system that a single developer had left behind — no documentation, daily hotfixes, frequent outages. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and established proper development processes from scratch. ASP.NET Zero and enterprise acceleration ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate delivery on projects in pharma automation, workplace management software, and industrial IoT — cutting setup time significantly and letting the team focus on actual business logic from day one. Full-stack development across the whole system Full-stack development for me means owning the entire delivery — ASP.NET Core back-end, Angular or React front-end, Microsoft SQL Server database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero for e-commerce teams — integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I have also delivered a fleet management system in .NET 9 and Angular handling large industrial equipment rental, tracking, and reporting at scale. On the front end I work with Angular, AngularJS, React, TypeScript, JavaScript, and Bootstrap — and I connect them cleanly to ASP.NET back-ends without creating maintenance nightmares six months later. Keywords Senior .NET Developer Upwork Full-Stack .NET Developer Upwork ASP.NET Core Developer Upwork ASP.NET MVC Developer Upwork C# Developer Upwork .NET Core Developer Upwork .NET Backend Developer Upwork .NET API Developer Upwork REST API Developer Upwork Microservices Developer Upwork Enterprise Application Developer Upwork SaaS Application Developer Upwork Cloud Application Developer Upwork Azure .NET Developer Upwork SQL Server Developer Upwork Database Architecture Specialist Upwork Performance Optimization Specialist Upwork Software Maintenance & Support Upwork Application Migration & Upgrade Services Upwork Third-Party Integration Specialist Upwork Core Skills ASP.NET Core, .NET Framework, C#, .NET Core, MVC, Web API, Entity Framework Core, SQL Server, Azure SQL, Microservices, RESTful APIs, SignalR, Blazor, Azure, AWS, Docker, CI/CD Pipelines, Agile Development, Responsive Web Design, Frontend Development, Backend Development, Database Management, Scalable Architecture, Cloud Deployment.

Most developers build apps. I build them and then try to break them that's what makes the difference. I started as a full-stack developer working across web apps and mobile (Android & iOS). Over time I moved deep into cybersecurity not as a career switch, but as an extension. Understanding how code is built is exactly what makes me better at breaking it. On the development side: 1. Web apps and websites: frontend to backend 2. Mobile apps: Android & iOS 3. REST APIs, authentication systems, database architecture On the security side: 1. Web Application Penetration Testing (OWASP Top 10, auth flaws, injection, business logic) 2. Mobile App Pentesting: Android APK reversing, insecure data storage, API security 3. Vulnerability Assessment & Reporting with actionable remediation 4. WordPress security, hacked site cleanup, hardening 5.Network & Infrastructure Security Currently working with NST Cyber on enterprise CTEM (Continuous Threat Exposure Management) securing banking and government portals internationally. Ranked Top 50 in India on HackTheBox. Featured in 40 Under 40 Rajasthan Patrika. If you need someone who can build your app AND lock it down or audit what's already live I cover both without you needing to hire two people. Penetration Testing Web Application Security WordPress Security Mobile App Security OWASP Vulnerability Assessment Network Security React Node.js Android Development REST API Cybersecurity Penetration Testing, Web Application Security, WordPress Security, Mobile App Security, OWASP, Vulnerability Assessment, Network Security, React, Next.js, Node.js, Laravel, PHP, Android Development, React Native, REST API, GraphQL, MySQL, PostgreSQL, MongoDB, Firebase, Cybersecurity