🌟5+ Years of Experience in .NET & Angular(Web & Desktop) I am a passionate Full-Stack Web Developer with a proven track record of delivering scalable, secure, and innovative software solutions for businesses worldwide. With 5+ years of experience (including collaborations with a leading German medical company in pathology), I specialize in aligning technology with business goals to deliver measurable results. Whether you're a startup looking to launch your MVP or an enterprise upgrading your existing platform, I can help turn your vision into reality. 🔑 MY KEY EXPERTISE ✔ Full-Stack Development with a specialization in .NET and Angular ✔ Bug Fixing and Performance Optimization for large-scale applications ✔ API Development and Integration (RESTful APIs, OAuth, JWT) ✔ Secure Role-Based Authentication and Scalable Solutions ✔ Deployment, Testing, and Debugging across various environments 🛠 My Tech Stack 🔹 Frontend: Angular, JavaScript, jQuery, Bootstrap, HTML5/CSS3 🔹 Backend: .NET Core, C#, Web API, WCF, SignalR Core 🔹 Database: SQL Server, MySQL, PostgreSQL 🔹 Tools: JIRA, Azure DevOps, GitHub, Visual Studio Team Services 🔹 Authentication: OAuth, JWT, Identity Framework 🏆 Why Work With Me? Proven Success: Delivered a large-scale platform for a leading German healthcare company, ensuring compliance with stringent medical standards and improving operational efficiency. Industry Experience: Healthcare, SaaS, CRM, Real Estate, HRM, Banking, Telecommunications, and more. Client-Centric Approach: I focus on understanding your unique business requirements to craft tailor-made solutions. Agile & Efficient: I use Agile methodologies to ensure timely delivery and adaptability to project needs. 💼 My Service Offerings ✔ Custom Software Development (Web & Enterprise Applications) ✔ API Development and Documentation (Swagger, OpenAPI) ✔ Database Design and Optimization for Performance ✔ Real-Time Applications (SignalR Core, WebSockets) ✔ Front-End Development (Responsive & Accessible Designs) ✔ Secure Authentication and Role-Based Authorization Systems 💡 What Sets Me Apart? I follow best practices in software engineering to ensure: ✔ Clean Code (SOLID, DRY, KISS Principles) ✔ Scalable Architectures (Layered, DDD, Microservices) ✔ Maintainability (Middleware, Modular Components) ✔ Optimized Performance (SQL tuning, Efficient Algorithms) 📈 Client Success Stories 🌟 "Saad demonstrated exceptional expertise in .NET development while working on our ERP auditing project. His in-depth knowledge of the .NET framework and ERP systems enabled him to identify and address critical issues efficiently. He showed a keen eye for detail, ensuring seamless integration and accurate reporting. His dedication, problem-solving skills, and collaborative approach made him a valuable asset to our team. Saad consistently delivered high-quality solutions, meeting deadlines and exceeding expectations. I highly recommend Saad for any .NET development project, especially those involving ERP systems and auditing. His expertise will undoubtedly enhance your project's success.!" 🌟 "I hired Saad for the development of medical scheduling software to help with some core feature development, integrations and refactoring to a clean codebase and Saad did a wonderful job. He's disciplined, passionate and most importantly loves the work he do, always willing to take on challenging tasks, learn them and come back with great results. Highly recommended for awesome Software teams." 🚀 Let's Collaborate! I am dedicated to helping businesses achieve their goals by crafting software solutions that are secure, scalable, and aligned with their vision. Whether you need a quick bug fix, a complex API, or a full-fledged enterprise application, I am here to help. 💬 Ready to start your next big project? Let’s connect and make it happen! Best Regards, Saad Ur Rehman

✅Microsoft Azure Certified ✅𝟏𝟎𝟎% 𝐂𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 ✅20+ Projects Delivered Successfully ✅Full Stack Developer having 7+ years of experience I specialize in building scalable, secure, and high-performance .NET backend systems on Microsoft Azure for SaaS startups and growing businesses. Here’s what I deliver: ✔️ Backend APIs & Web Applications (.NET / ASP.NET Core) – scalable, secure, and high-performance RESTful Web APIs and enterprise web applications Ecommerce platforms, AI-powered applications, and business websites, built with clean architecture, SOLID principles, and production-ready standards. ✔️ Azure Cloud & SaaS Infrastructure (Azure App Services, Azure SQL, Functions) – cloud-native deployments, CI/CD pipelines, and scalable SaaS backend systems designed for reliability, observability, and long-term growth. ✔️ Secure API & Identity Systems (JWT, OAuth2, OpenID Connect) – enterprise-grade authentication, role-based access control (RBAC), encryption, and Zero Trust security architecture. ✔️ Database & Performance Optimization (SQL Server, EF Core, Dapper) – optimized queries, indexing strategies, and high-load performance tuning to ensure stable and efficient backend systems. ✔️ System Modernization & Integration (Dynamics 365, Third-Party APIs) – legacy .NET upgrades, CRM integration, payment gateway connectivity, and secure API integrations built for scalability. ⭐ Recent Client Feedback: “Sadeed is highly knowledgeable and handled a very difficult issue smoothly and efficiently.” “I wholeheartedly recommend Sadeed Ullah Khan — he was fully committed and delivered the project on time.” Let’s schedule a complimentary consultation to review your requirements and outline a clear, structured approach for your project.

You have a system to build, fix, or scale and you need someone who can own it end-to-end without hand-holding. That’s what I do. Over the past 9+ years, I’ve shipped production applications for healthcare organizations, government agencies, SaaS companies, and fintech startups. My clients come back because I don’t just execute tickets, I help them make the right technical decisions before a single line of code is written. What I Actually Do for Clients • Modernize messy legacy .NET codebases without breaking production • Architect multi-tenant SaaS platforms from the ground up (database design, authentication, deployment) • Build complex Angular/React frontends that real users find intuitive • Set up CI/CD pipelines, cloud infrastructure, and monitoring so your app doesn’t just work on my machine • Integrate AI/ML capabilities into existing business workflows AI-Assisted, Senior-Led Development I use AI-assisted development tools (GitHub Copilot, Claude, Cursor) daily. it means I ship features 2–3x faster than a traditional developer while maintaining code quality. You get senior-level judgment at startup speed. Technical Stack C#, .NET Core, ASP.NET Angular, React, TypeScript, Node.js SQL Server, PostgreSQL Azure, Docker I choose tools based on your problem, not my preferences. If your project needs someone who can think, build, and ship. let’s talk.

.NET Core | ASP.NET Core | C# | Angular | React.js | AI Integration | N8N | SaaS | Azure | SQL Server ⭐ Top Rated | 100% Job Success | 10+ Years | .NET Engineer building SaaS & AI-powered web apps I've spent the last 10 years building web platforms that actually ship — not prototypes that sit in staging forever. I work with founders, CTOs, and product teams who need a developer they don't have to babysit. You describe what you're trying to achieve. I figure out how to build it. We ship. My background is .NET and Angular, but I've been integrating AI into production systems long before it became a checkbox on job posts — OpenAI APIs, N8N automation, intelligent workflows, the works. Industries I've built for: Healthcare, SaaS, FinTech, E-Commerce, ERP, Real Estate, Hospitality. What I'm good at: ✔ .NET Core, ASP.NET Core, C#, Web APIs, Microservices ✔ Angular, React.js, Next.js, TypeScript ✔ AI Integration — OpenAI, GPT, N8N, LLM workflows ✔ Azure, Docker, CI/CD, SQL Server, PostgreSQL ✔ Stripe, SignalR, Twilio, third-party API integrations I care about clean code and clean communication. Deadlines aren't suggestions — they're commitments. If that sounds like what you need, let's talk. #DotNetDeveloper #ASPNetCore #CSharpDeveloper #FullStackDeveloper #SaaSDeveloper #AIIntegration #N8NAutomation #OpenAIIntegration #AngularDeveloper #ReactDeveloper #AzureDeveloper #SignalR #RESTAPIDeveloper #SQLServerDeveloper #EntityFramework #DockerDeveloper #BackendDeveloper #FrontendDeveloper #TechLead #SoftwareEngineer #EnterpriseDeveloper #HealthcareTech #FinTech #ERPDeveloper #StripeDeveloper #PostgreSQLDeveloper

Senior Full Stack .NET Developer with 6+ years of experience building scalable, high-performance web applications using C#, ASP.NET Core, .NET 6/8, Blazor, Entity Framework, and Azure. I specialize in designing enterprise-grade backend systems, RESTful APIs, and modern full-stack applications with strong focus on performance, clean architecture, security, and maintainability. My expertise includes: • ASP.NET Core / .NET 6+ • Blazor Server & WebAssembly • REST APIs & Microservices • Entity Framework Core & SQL Server • Azure Cloud & CI/CD Pipelines • Docker & Kubernetes • Angular & JavaScript • Authentication & Authorization (JWT/OAuth) I have experience leading development initiatives, optimizing application performance, mentoring developers, and collaborating with cross-functional teams in Agile environments. I am a highly skilled 𝗦𝗲𝗻𝗶𝗼𝗿 .𝗡𝗘𝗧 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with over 6 years of experience specializing in full-stack development using 𝐂#, .𝐍𝐄𝐓 𝐂𝐨𝐫𝐞, and related technologies. My expertise lies in building robust, scalable web applications, optimizing performance, and implementing best practices for clean, maintainable code. In my recent role, I contributed to the development of modern applications using .𝗡𝗘𝗧 𝗥𝗘𝗦𝗧𝗳𝘂𝗹 𝗔𝗣𝗜, .𝗡𝗘𝗧 𝗠𝗩𝗖 and MS SQL Server, while also driving continuous improvement through DevOps practices. I have extensive experience with Azure DevOps for CI/CD pipelines and Azure / AWS Cloud Services for infrastructure management. I am passionate about delivering high-quality solutions, collaborating with global teams, and staying ahead of the curve with emerging technologies. Always focused on driving innovation and optimizing development workflows, I’m committed to delivering exceptional software that meets both business and technical needs. SKILLS ✅.NET Core, ASP.NET MVC, C#, Entity Framework, LINQ ✅.NET Core, ASP.NET MVC, C#, Entity Framework, LINQ ✅.NET RESTful APIs, .NET MVC Applications, ✅SQL Server, MongoDB, PostgreSQL ✅Blazor Server, Blazor WebAssembly (WASM), Razor Components ✅Azure Cloud Services, Azure DevOps,OAuth Security, JWT Authentication ✅DevOps: Docker, Kubernetes, Jenkins, Azure DevOps ✅Machine Learning (ML): Random forest, Isolation forest, BART, CUSUM, SVM, Naïve Bayyes etc ✅Data Science: Data Modeling, Predictive Analytics, Data Visualization, content generation ✅Natural Language Processing (NLP), AI-driven APIs ✅Agile/Scrum methodologies, Jira, Trello, ClickUp ✅Version Control: Git, GitHub, Bitbucket ✅Front-End: HTML5, CSS3, Bootstrap, jQuery, JavaScript ✅3rd Party Integrations, RESTful Services ✅Unit Testing: NUnit, XUnit, Selenium, Mocking Frameworks ✅Collaborative Tools: Slack, Skype, Asana ✅.NET 6+, ASP.NET, Blazor, Razor Components ,WebAssembly, Microservices ✅RabbitMQ, Azure Service Bus, TDD, Integration Testing, Performance Optimization ✅Security Best Practices, TypeScript, CI/CD, Code Reviews, Scalable Applications I’m available 24/7 and ready to jump into a conversation anytime. Let’s schedule a meeting to explore how I can bring value to your team!

🚀 Senior Full-Stack Developer | AI-First Engineering | Angular, React, .NET Core | Azure & GCP I'm a **Senior Full-Stack Developer** with **15+ years of experience** building secure, scalable, and high-performance web applications using **Angular, React, .NET Core, Azure, Google Cloud Platform (GCP), and modern cloud technologies**. My approach is **AI-First Development**—leveraging the latest AI coding platforms to accelerate software delivery while applying senior engineering expertise to ensure production-ready quality, security, scalability, and maintainability. ## 🤖 AI-First Development Expertise I build software using advanced AI development workflows powered by: * Claude (Opus/Sonnet) * OpenAI Codex & ChatGPT * Google Gemini * GitHub Copilot * Advanced prompt engineering & multi-model AI workflows * AI-assisted architecture, coding, debugging, refactoring, testing, documentation, and code reviews By combining AI with 15+ years of engineering experience, I consistently deliver projects **up to 10× faster** while maintaining clean architecture and production-quality code. ## 💻 Core Expertise ### Backend * .NET Core & ASP.NET Core * REST APIs & Microservices * SQL Server, PostgreSQL & NoSQL databases * Authentication, Authorization & Security * Legacy application modernization ### Frontend & UI Development * Angular & React * **Figma to HTML/CSS** * Pixel-perfect, responsive UI implementation * Responsive & mobile-first development * Component-based architecture * State management & performance optimization * Real-time applications * Cross-browser compatibility ### Cloud, DevOps & Infrastructure **Microsoft Azure** * App Services * Azure Functions * Service Bus * Blob Storage * Key Vault * Application Insights **Google Cloud Platform (GCP)** * Cloud Run * Google Workflows * Cloud Functions * Cloud Storage * Cloud-native application deployment **DevOps** * CI/CD Pipelines * Docker & Containerization * Infrastructure as Code * Monitoring, Logging & Performance Optimization ## Why Clients Hire Me * ✅ 15+ Years of Enterprise & Startup Experience * 🤖 AI-First Development with Claude, Codex, Gemini & leading AI development tools * ⚡ Up to 10× Faster Delivery through AI-Accelerated Engineering * 🎨 Pixel-Perfect Figma to HTML/Angular/React Implementation * ☁️ Azure & Google Cloud (GCP) Expertise * 🔐 Secure, Production-Ready Solutions * 🏗️ Clean Architecture & Scalable Systems * 🤝 Clear Communication & Long-Term Collaboration If you're looking for a senior developer who combines **AI-powered development speed with enterprise-grade engineering**, I can help transform **Figma designs into responsive, production-ready web applications** and build scalable solutions using **Angular, React, .NET Core, Azure, and Google Cloud Platform**.

To obtain a challenging position in the IT sector with a progressive organization that will fully utilize my talents and technical skills and help me reach higher echelons. Efficient, hardworking, energetic and result oriented professional with more than 10 years of experience in ASP.NET Web Forms, MVC, .NET CORE, Web API, Android and IOS development including both native and hybrid, Angular, React. Have also worked on some automated programs using python. Having ability to handle servers like AWS, Azure etc.

7+ years building enterprise web apps and AI-powered systems that solve real business problems , not just ship code. I specialise in full-stack development with .NET Core, Angular, React , next and Node.js and I build AI Agents and automated workflows using OpenAI, LangChain, n8n and Vapi. Whether it's a scalable SaaS platform, a complex Angular enterprise app, or an AI agent that automates your operations - I've built it. ━━━━━━━━━━━━━━━━━━━━━━━━ CORE STACK ━━━━━━━━━━━━━━━━━━━━━━━━ - .NET Core / ASP.NET / ASP.NET MVC — 8+ years - Angular (v2–21) — 7+ years - React / Next.js — 4+ years - Node.js / Express — 4+ years - TypeScript — across all frontend work - Azure / GCP — cloud deployment & services - SQL Server / MongoDB / PostgreSQL / Redis ━━━━━━━━━━━━━━━━━━━━━━━━ AI & AUTOMATION ━━━━━━━━━━━━━━━━━━━━━━━━ - AI Agents — OpenAI, LangChain, tool-calling, RAG pipelines - Voice AI — Vapi integration & model configuration - Workflow automation — n8n, make - LLM prompt engineering & fine-tuning ━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I'VE BUILT ━━━━━━━━━━━━━━━━━━━━━━━━ - SaaS platforms with multi-tenant .NET backends - Enterprise Angular apps (Dynamics 365 integrations, MSAL auth) - Real-time systems with WebSockets + Socketio - AI chatbots and voice agents for business automation - E-commerce, CRM, CMS, and healthcare platforms ━━━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS KEEP COMING BACK ━━━━━━━━━━━━━━━━━━━━━━━━ - 100% Job Success Score - Clear communication & daily updates - On-time delivery, every time - 1 month post-delivery support If you need a senior developer who understands both enterprise architecture and modern AI - let's talk.

Having 8+ years of experience in various web development platforms with a proven track record of successful achievements. My Objective is to provide in time services to the client within their budget as per specifications and accepting challenges to deliver the product keeping above all client satisfaction. My web developing expertise includes: • Designing, building and maintaining websites. • Strong Ecommerce, SEO and database knowledge. • Extensive knowledge of ASP.NET, ASP.NET Core, RESTful API, C#, PHP, WORDPRESS,HTML 5, SQL SERVER, MY SQL, JavaScript, jQuery, Angular, Ajax, CSS ----------------------------------------------------------------- Overview of My website development process: Discovery and Planning: I will work with you to understand your business, target audience, and objectives for the website. I shall also conduct research to understand your competitors and industry trends. Design: Based on the information gathered during the discovery phase, I will create wireframes and mockups of the website design. This will allow you to visualize the layout, colors, and other design elements before we move on to the development phase. Development: Once the design is finalized, I will begin the development phase where I will code the website and make it functional. During this phase, I will also perform testing to ensure the website is optimized for search engines and works well on all devices. Launch and Maintenance: Once the website is complete, I will launch it and provide training on how to manage and update your website's content. I also offer ongoing maintenance services to ensure your website remains up-to-date and secure.

I'm a senior software engineer with 15+ years of experience building robust, scalable systems - from distributed back-end services to cloud-native architectures. I specialize in .NET/C#, but my focus has evolved beyond just writing code: I architect solutions, own technical decisions, and integrate modern AI capabilities into real-world products. Recently, I've been working hands-on with LLM-powered development - building agentic workflows, integrating Claude and other AI APIs, and applying prompt engineering to automate complex business logic. I understand not just how to call an AI API, but how to design reliable systems around non-deterministic outputs. Python is my go-to language for AI/ML tooling, scripting, and rapid prototyping in this space. Core strengths: System architecture --- distributed systems, microservices, event-driven design, API design Cloud --- Azure & AWS (infrastructure, managed services, identity, deployments, security, cost management) AI / Agentic development --- Claude API, LLM integration, agentic pipelines, prompt engineering .NET ecosystem --- ASP.NET Core, Web API, EF Core, WPF/Winforms, SignalR Python --- AI/ML tooling, automation, scripting, data pipelines Databases --- MSSQL, PostgreSQL, MySQL, MongoDB Front-end --- Angular/React, HTML/CSS, JavaScript/jQuery I take quality seriously and aim to deliver clean, maintainable code, not just working software.