I am a backend-focused engineer specializing in system architecture design, DevOps workflows, and SQL Server management. I help businesses build, optimize, and maintain reliable, scalable, and secure systems. My work focuses on designing clean architectures, improving deployment pipelines, and ensuring databases perform efficiently under real-world workloads. I believe in practical solutions, clear documentation, and systems that are easy to maintain long-term. I have worked on large-scale, production-level platforms in the travel and software domains, contributing to stable infrastructure and performance-focused backend systems. My Skills: ✅ Enterprise Application Development ✅ APIs Development ✅ Azure Hosting ✅ Parallel/Multitask Programming ✅ CI/CD pipelines ✅ Code repository management Proficient working on: ✅ ASP.Net MVC / Core ✅ Blazor ✅ MS Sql Server ✅ CSS, Bootstrap ✅ Kendo UI ✅ Azure functions/web jobs

With over 12 years of extensive experience in developing web applications, I have honed my skills in delivering robust and efficient .NET programming solutions. My professional journey encompasses a wide range of responsibilities including designing, developing, maintaining, modifying, and supporting software applications. Technical Expertise: .NET Framework: Proficient in building applications using .NET Entity Framework, ASP.NET, and ASP.NET Core. Front-End Technologies: Skilled in Angular, HTML, CSS, JavaScript, JQuery, AJAX, React.Js, and Bootstrap for creating dynamic and responsive user interfaces. Programming Languages: Experienced in C#, C++, and SQL for developing comprehensive software solutions. Databases: Competent in working with SQL Server, MySQL, and T-SQL for managing and querying data effectively. Web Technologies: Knowledgeable in developing and integrating MicroServices, Web API, and REST API to ensure seamless application functionality. Application Types: Versatile in developing both Windows and Web Applications. Frameworks and CMS: Adept at using ASP.NET MVC and various Content Management Systems (CMS) for streamlined application management and development.

💻 **C# | .NET Core | ASP.NET MVC/Web API | Azure DevOps| SQL | Crystal Reports | Graph QL | Full-Stack Developer** Are you looking for a developer who can **bring your ideas to life** with clean, efficient, and scalable code? I’m **Sharjeel Najam**, a seasoned **.NET Developer** with **5+ years of professional experience** building real-world applications and solving business challenges through technology. From designing robust backends to creating insightful reporting systems, I specialize in turning complex requirements into seamless user experiences and powerful backend logic — using the full Microsoft tech stack and beyond. ## 🧩 What I Do Best: 🔹 **.NET Development:** Skilled in building and maintaining applications using **.NET Core**, **C#**, and **ASP.NET MVC**. Whether it’s a full system from scratch or maintaining/refactoring legacy code, I deliver clean and maintainable solutions. 🔹 **Web Applications & APIs:** I design secure and scalable **Razor Pages** apps and **RESTful APIs** using **ASP.NET Core**, with strong integration and database handling capabilities. 🔹 **Database Design & Optimization:** Efficient with **MS SQL Server** and **MySQL** — from writing complex queries to optimizing database structure, indexing, and stored procedures for speed and reliability. 🔹 **Reports & Dashboards:** I build **Crystal Reports** and **RDLC Reports** for clients who need accurate, professional business reporting integrated with their applications or databases. 🔹 **Frontend Development:** Experienced with **Blazor**, **Angular**, **JavaScript**, and **jQuery**, I create responsive, interactive frontends that work across modern browsers and devices. 🔹 **Troubleshooting & Debugging:** I’m great at digging into messy code and finding what’s broken. I clean up legacy applications and make them faster, safer, and easier to maintain. ## 🛠️ Tools & Technologies I Use: **Languages & Frameworks:** ✔️ C#, .NET Core, ASP.NET MVC, Razor Pages, Web API, Blazor ✔️ JavaScript, jQuery, Angular **Database & ORM:** ✔️ Microsoft SQL Server, MySQL ✔️ Entity Framework, LINQ **Reporting Tools:** ✔️ Crystal Reports, RDLC Reports **Development Tools:** ✔️ Visual Studio, Git, GitHub, Bitbucket ✔️ Postman, Swagger, SSMS **Architecture & Principles:** ✔️ OOP, SOLID, Design Patterns (Repository, Factory, Singleton) ✔️ Clean Code, Separation of Concerns, Reusability ## 🚀 What Makes Me a Great Fit: ✔️ I **understand your business needs**, not just your tech stack. ✔️ I build solutions that are **scalable, easy to maintain, and perform well**. ✔️ I **communicate clearly**, update regularly, and deliver on time. ✔️ I write code that others can read, understand, and build upon. ✔️ I bring **a problem-solving mindset** to every challenge. Whether you’re a startup needing a full-stack developer, a company optimizing internal tools, or a client with a legacy system in need of support — I bring both the **technical knowledge and professionalism** to move your project forward. ## 🧠 Past Project Highlights: 🔸 Designed a full-stack inventory management system using .NET Core, Razor Pages, and SQL Server 🔸 Migrated and optimized legacy systems to .NET Core with performance and security enhancements 🔸 Developed custom Crystal Reports and RDLC dashboards for financial and operational analytics 🔸 Built secure REST APIs to connect mobile apps with backend services 🔸 Implemented complex business logic in ERP-like systems for sales, purchases, and reporting ## ✅ Let's Work Together When you hire me, you’re getting more than just a coder — you're getting a **solution-oriented partner** who genuinely wants your project to succeed. 📩 **Send me a message** today and let’s discuss how I can help turn your project into a long-term success.

Senior Full-Stack .NET Engineer with 5+ years building scalable SaaS platforms, billing systems, and high-performance REST APIs using ASP.NET Core, ABP Framework, C#, Angular, and React. I specialize in subscription billing with Stripe, AI/LLM integration, microservices, and production-grade systems built for scale and long-term maintainability. I deliver reliable backend systems, multi-tenant SaaS platforms, API-driven applications, and full-stack solutions that are secure, performant, and built to last. — WHAT I DELIVER — Scalable ASP.NET Core / ABP Framework backends for SaaS End-to-end Stripe billing (subscriptions, metered usage, credit grants, prorated upgrades, idempotent webhooks) AI-powered platforms (Claude, OpenAI, Semantic Kernel) REST APIs and microservices Full-stack SaaS development Real-time systems (SignalR) Self-hosted SaaS infrastructure on Hetzner + Coolify (cost-effective AWS alternative) Cloud-ready containerized deployments — BACKEND — ASP.NET Core / .NET 6–10 | ABP Framework (Volo) — modules, multi-tenancy, permissions, background workers, distributed events | C# | DDD | CQRS | Clean Architecture | SOLID | EF Core | PostgreSQL | SQL Server | Redis | OpenIddict | JWT | OAuth2 | RabbitMQ — PAYMENTS — Stripe Billing (V1+V2) | Subscriptions & metered billing | Credit grants & expiry | Proration logic | Webhook idempotency + concurrency-safe handlers | Stripe Tax | SCA / 3DS — AI / LLM — Anthropic Claude | OpenAI GPT | Semantic Kernel | Prompt engineering | Token-cost tracking | Multi-provider routing | Image generation — FRONTEND — Angular (signals, standalone components, OnPush, @if/@for/@let) | React | TypeScript | RxJS | Reactive forms | Bootstrap 5 | LeptonX — CLOUD & DEVOPS — Docker | Kubernetes | Hetzner | Coolify | AWS (EC2, RDS, S3) | Vercel | Cloudflare R2 | GitHub Actions / Workflows | CI/CD pipelines | Self-hosted PaaS deployments — ALSO — WPF (MVVM) | xUnit | Serilog | Performance profiling | Agile / Git workflows — IF YOU'RE LOOKING FOR — ABP Framework specialist Stripe Billing engineer (subscriptions, metered, idempotency) AI SaaS backend developer Self-hosted infrastructure setup (Hetzner + Coolify) Full-stack SaaS / microservices / scalable REST APIs Senior-level .NET engineer for scalable, production-ready SaaS, especially platforms with subscription billing or AI integration. Let's talk.

✅ 100% Job Success | Rising Talent | Top Quality Delivery 💼 Senior Full Stack .NET Developer | C# | .NET 8 | Azure | React Hello ✋ If you're looking for a developer who can build scalable, secure, and high-performance applications, you're in the right place. I’m a Full Stack .NET Developer with 7+ years of experience, specializing in C#, .NET Core (6/7/8), and modern web technologies. Since 2018, I’ve been helping clients design and develop reliable backend systems, APIs, and full-stack applications that are built to scale. 🚀 What I can do for you: Build robust .NET Core Web APIs & enterprise backend systems Develop modern, responsive React.js frontends Design clean, scalable architectures (Clean Architecture, SOLID, DI) Optimize performance using Entity Framework, Dapper, Redis Integrate third-party services, APIs, and cloud solutions Set up CI/CD pipelines using Azure DevOps Fix, upgrade, or scale existing applications 🛠 Core Technologies: C#, .NET Core, ASP.NET MVC/Web API, Blazor, React.js, JavaScript, SQL Server, PostgreSQL, MongoDB ⚙️ Tools & Expertise: Entity Framework Core, LINQ, Dapper, REST APIs, Azure, AWS, Git (GitHub/GitLab/Bitbucket), CI/CD, Unit Testing (xUnit, bUnit), Redis, ElasticSearch 🏗 Architecture & Best Practices: Clean Architecture, Repository Pattern, SOLID Principles, Dependency Injection ☁️ Cloud & DevOps: Azure, AWS, Azure DevOps, CI/CD pipelines 🎯 I focus on writing clean, maintainable code, delivering on time, and ensuring long-term scalability for your business. 📍 Available for full-time, long-term projects (EST hours compatible) Let’s build something great together — feel free to message me anytime!

I’m a Senior Full Stack Developer with over 9 years of experience delivering scalable, high-performance web applications and AI-powered solutions across multiple domains. My expertise spans Node.js, Next.js, Angular, React, and JavaScript/TypeScript, with a strong foundation in backend architecture, API integrations, and cloud-based deployments. On the backend, I specialize in .Net, .Net Core, Node.js, Express, and Prisma ORM with databases like PostgreSQL and MongoDB, building efficient, maintainable, and secure services that adhere to modern coding standards and best practices. I’m deeply focused on AI integrations, connecting intelligent systems through OpenAI, Google Cloud AI, and other ML-driven APIs to enhance automation, personalization, and decision-making workflows. I take pride in writing clean, testable, and production-grade code, maintaining strong version control with GitHub, managing agile sprints via JIRA, and collaborating seamlessly with cross-functional teams. My approach emphasizes scalability, modular architecture, CI/CD readiness, and end-to-end delivery excellence — from concept to deployment. Whether building interactive Next.js dashboards, Angular enterprise applications, or real-time React interfaces, I ensure every project aligns with performance, security, and long-term maintainability standards. Core Skills: Languages: JavaScript, TypeScript, SQL Frontend: React, Next.js, Angular, HTML5, CSS3 Backend: Node.js, Express, Nest.js, .NET, .Net Core Databases: PostgreSQL, MongoDB, Prisma ORM AI & Automation: OpenAI API, Google Cloud AI, workflow automation Tools: GitHub, Jira, Postman, Docker, AWS, CI/CD pipelines Practices: Clean Code, SOLID Principles, Scalable Architecture, Agile & Scrum

🚀 Senior AI & Full-Stack Developer | Top Rated Plus | 100% Job Success | $200K+ Earned I help startups and businesses build AI-powered applications, SaaS platforms, and automation systems that reduce manual work, improve customer response times, and streamline operations. With 10+ years of experience in software development and over $200K earned on Upwork, I have successfully delivered web applications, business automation tools, and custom software solutions for clients worldwide. Whether you need an AI assistant, customer support chatbot, internal business tool, or a complete SaaS platform, I can take your project from concept to deployment. What I Deliver: ✔ AI-powered customer support systems that automate common inquiries and improve response times ✔ AI lead qualification and sales assistants that help businesses capture and convert more opportunities ✔ Workflow automation solutions connected to CRM, Email, WhatsApp, and third-party platforms ✔ Document processing and knowledge-base systems using LLMs and RAG architecture ✔ Custom SaaS platforms designed for scalability, performance, and long-term growth Core Expertise: • OpenAI / ChatGPT Integrations • AI Agents & AI Assistants • Retrieval-Augmented Generation (RAG) • AI Workflow Automation • SaaS Application Development • Business Process Automation Technology Stack: • OpenAI API, LLMs, Prompt Engineering, RAG • React.js, Next.js, Angular • Node.js, ASP.NET Core • REST APIs & Third-Party Integrations • Scalable Database & Backend Architecture My approach is simple: build solutions that create measurable business value, not just software. If you're looking for a reliable development partner who can design, develop, and launch AI-powered products that solve real business problems, let's discuss your project.

👋 Hello! I'm a versatile Software Engineer with expertise in both Quality Assurance and Full-Stack Development, dedicated to enhancing your project's performance and reliability. With a strong track record across industries like Fintech, Streaming Services, and Logistics, I excel in optimizing user experiences and ensuring flawless application functionality. 🚀 Here's what I bring to the table: - Automation & QA Expertise: Skilled in Selenium WebDriver for web automation, Appium for mobile automation, and Postman/Swagger for API testing. Proficient in STLC, bug reporting, and test plan creation. - Backend Development Skills: Experienced in C# .NET Framework/Core, ASP.NET Web API/MVC, .NET Entity Framework, MSSQL, and MSUnit for unit testing. - DevOps & Cloud: Familiar with Docker for containerization, Kubernetes for orchestration, AWS/Azure for cloud deployment, and CI/CD pipelines using Git. 🤝 Let's discuss how I can contribute to your project's success through seamless QA practices and robust backend development. Looking forward to collaborating with you! Buzzwords: Payment Integration Stripe Payment Gateway ERP CRM, Develop and Maintain User- friendly Interface.

🚀 Microsoft Certified Cloud & Full-Stack Engineer | 10+ Years of Experience 🚀 I am a Microsoft Certified Developer with over 10 years of hands-on experience designing and building cloud-native, distributed systems used by millions of users. Certifications: learn.microsoft.com/en-us/users/zeeshanahmad-5215/transcript/dgwxyhe2jo46lg6 Portfolio: zeeshanwebdev.github.io GitHub: github.com/zeeshanwebdev YouTube: youtube.com/@stepupyaar Stack Overflow: stackoverflow.com/users/20849192/muhammad-zeeshan I specialize in microservices-based architectures, secure authentication & authorization, and highly scalable cloud solutions. I have successfully delivered enterprise-grade systems with a strong emphasis on reliability, performance, and security, leveraging modern cloud platforms, AI-driven tools, and best engineering practices. Cloud & Distributed Systems Cloud-native architecture using Azure Microservices, event-driven systems, Pub/Sub High availability, scalability, and fault-tolerant design Secure Authentication & Authorization(OAuth2, JWT, Identity Providers) Backend & APIs .NET (Core, MVC, Web Forms, MAUI, Blazor) RESTful & event-based APIs CQRS, clean architecture, and domain-driven design CI/CD pipelines and DevOps automation Frontend Engineering Angular, React, Vue.js Modern, responsive, and accessible UI development Seamless frontend–backend integration Databases & Performance SQL Server, MySQL Query optimization and performance tuning AI & Automation AI-assisted development using ChatGPT, GitHub Copilot Intelligent automation and productivity-focused solutions Collaboration & Delivery GitHub-based workflows, code reviews, and team collaboration Agile development and transparent communication Innovative | Results-Driven | Client-Focused I am passionate about solving complex technical challenges and helping businesses scale through secure cloud architectures, AI-powered solutions, and modern web technologies. My goal is always to deliver high-quality, maintainable, and future-ready systems that create real business value.

15+ years in .NET and C# area successfully covering Web | Mobile | Backend # From modern .NET / ASP.NET Core MVC and Blazor apps development to legacy WebForms support. # Data Storage in clouds or SQL/NoSQL databases accessed with Entity Framework. # From front-end side based on Angular / Vue / React to low-level support with pure JavaScript/jQuery/Ajax. # From MAUI and Flutter iOS/Android/Windows MvvM modern apps to old-fashioned WinForms. - Computer Science University Degree. - Analytics, legacy code migration, testing, support, documentation. - Long- and mid-term collaboration preferred. - Flexible working hours; ET/EDT time zone communication-friendly. - Ukrainian Development Culture (located in safe place now).