Modern .NET applications need more than just code - they need structure, scalability, and long-term reliability. Bringing 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 of experience working with 𝐂#, 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞, 𝐚𝐧𝐝 𝐦𝐨𝐝𝐞𝐫𝐧 .𝐍𝐄𝐓 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 I develop scalable systems across enterprise applications, CMS platforms, and eCommerce solutions. My focus is on creating structured, maintainable codebases that support long-term growth rather than short-term fixes. I have hands-on experience with CMS platforms including 𝐃𝐍𝐍 (𝐃𝐨𝐭𝐍𝐞𝐭𝐍𝐮𝐤𝐞), 𝐔𝐦𝐛𝐫𝐚𝐜𝐨, 𝐒𝐢𝐭𝐞𝐟𝐢𝐧𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐎𝐫𝐜𝐡𝐚𝐫𝐝, where I handle custom development, module creation, integrations, and performance improvements. On the eCommerce side, I work extensively with 𝐍𝐨𝐩𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 - customizing workflows, improving performance, and building tailored features based on business needs. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊: ⦁ 𝐁𝐀𝐂𝐊𝐄𝐍𝐃- C#, ASP.NET Core, .NET Core, .NET 8, ASP.NET MVC, Web API, Entity Framework, LINQ, Microservices Architecture, SignalR, gRPC, Clean Architecture, Domain-Driven Design (DDD), CQRS ⦁ 𝐂𝐌𝐒 & 𝐄𝐂𝐎𝐌𝐌𝐄𝐑𝐂𝐄 - DNN (DotNetNuke), Umbraco CMS, Sitefinity CMS, Orchard CMS, NopCommerce, Custom CMS Development, Headless CMS, CMS Migration & Optimization ⦁ 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄- SQL Server, PostgreSQL, MySQL, MongoDB, Redis, CosmosDB, Database Design, Query Optimization, Indexing, Stored Procedures ⦁ 𝐂𝐋𝐎𝐔𝐃 & 𝐃𝐄𝐕𝐎𝐏𝐒 - Microsoft Azure, Azure App Services, Azure Functions, Azure DevOps, AWS (EC2, S3, Lambda, RDS), Docker, Kubernetes, CI/CD Pipelines, GitHub Actions, Infrastructure as Code (IaC), Linux ⦁ 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 & 𝐒𝐘𝐒𝐓𝐄𝐌 𝐃𝐄𝐒𝐈𝐆𝐍 - RESTful APIs, GraphQL, Distributed Systems, Event-Driven Architecture, Scalable System Design, High Availability Systems ⦁ 𝐈𝐍𝐓𝐄𝐆𝐑𝐀𝐓𝐈𝐎𝐍𝐒 - Stripe, Twilio, SendGrid, Salesforce, DocuSign, Google APIs, Payment Gateways, SOAP APIs, REST APIs, Webhooks, Third-Party API Integrations ⦁ 𝐓𝐄𝐒𝐓𝐈𝐍𝐆 & 𝐐𝐔𝐀𝐋𝐈𝐓𝐘 - Unit Testing, Integration Testing, xUnit, NUnit, Test Automation, Debugging, Performance Profiling ⦁ 𝐀𝐈 & 𝐀𝐔𝐓𝐎𝐌𝐀𝐓𝐈𝐎𝐍 - Python, FastAPI, OpenAI API, Automation Workflows, Data Processing 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐄𝐋𝐈𝐕𝐄𝐑 ⦁ Full-stack .NET application development ⦁ CMS development and customization (DNN, Umbraco, Sitefinity, Orchard) ⦁ eCommerce solutions using NopCommerce ⦁ Scalable APIs and backend systems ⦁ Legacy system modernization to ASP.NET Core ⦁ Performance optimization and database tuning ⦁ Cloud-ready deployments and architecture ⦁ Debugging, stabilization, and ongoing improvements 𝐃𝐎𝐌𝐀𝐈𝐍𝐒 & 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐈𝐄𝐒 ⦁ Finance & FinTech ⦁ eCommerce & Retail ⦁ Healthcare & HealthTech ⦁ Education & eLearning ⦁ SaaS Platforms ⦁ Real Estate ⦁ Logistics & Supply Chain ⦁ Enterprise Business Applications ⦁ CRM & ERP Systems I focus on delivering solutions that are clean, efficient, and built to scale - so your system continues to perform as your business evolves. 𝐈𝐟 𝐲𝐨𝐮'𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚 .𝐍𝐄𝐓 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐬 𝐛𝐨𝐭𝐡 𝐂𝐌𝐒 𝐞𝐜𝐨𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐚𝐧𝐝 𝐜𝐮𝐬𝐭𝐨𝐦 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐈’𝐦 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐭𝐨 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞.

I'm a Top Rated Senior C#/.NET Developer with 13+ years of experience building enterprise applications, APIs, system integrations, and data processing solutions. I've earned $80K+ on Upwork with a 100% Job Success Score by helping businesses modernize software, automate workflows, and solve complex technical challenges. I specialize in developing reliable backend systems using C#, ASP.NET Core, .NET, SQL Server, Entity Framework, REST APIs, Azure, and enterprise integrations. My experience includes building new applications, enhancing existing systems, integrating third-party platforms, and modernizing legacy applications such as MS Access and COM-based solutions. Over the years, I've delivered solutions for healthcare, legal, eDiscovery, document processing, OCR, JSON/XML transformations, data migration, reporting, and enterprise automation. I enjoy working on projects that require strong problem-solving skills and attention to detail. My core expertise includes: • C#, .NET, ASP.NET Core • SQL Server, Entity Framework • REST APIs & Third-Party Integrations • Azure & Cloud-Based Solutions • AI Automation & OpenAI Integration • JSON, XML & Data Transformation • OCR & Document Processing • Enterprise Software Development • Legacy System Modernization (MS Access, VBA, COM) • Performance Optimization & Debugging Clients value me for writing clean, maintainable code, communicating clearly, and delivering dependable solutions. Many of my projects have turned into long-term collaborations because I focus on understanding business requirements and building software that is scalable, reliable, and easy to maintain. If you're looking for an experienced developer who can build, integrate, modernize, or automate your business applications, I'd be happy to discuss your project.

Over 12+ years of experience in the IT industry, involved in Software Design, Analysis, Development, Integration, and Testing at the client and server sides in various domains such as transport, finance, fintech, real estate, eCommerce, etc. My Skills: • Experience in .NET Framework/Core • Experience with C# 14 and .NET 9 and earlier versions • Experience in React, Angular, HTML5, JavaScript, and CSS • Windows desktop application development experience • Experience with Windows and WCF services development • Experience in Microservice API and REST services, and understanding of containers • Experience with WPF GUI Modular application development • Practical experience using MVVM design pattern and DevExpress WPF controls • Exposure in multi-process .NET applications • Relational database experience MySQL & SQL Server • Understanding of message queues and middleware. • Experience with SDLC tools, like Jira, bitbucket, bamboo Confluence, GIT source control system • XAML-based user interface development experience (e.g., WinUI 3, UWP, WPF) • Experience with LINQ to XML • Understanding of XML schemas (XSD) • Attentive to user feedback • Ability to work independently • Git version control • Solid understanding of testing principles and high-quality software • Excellent written and verbal English communication skills. Worked in an Agile team of .NET developers for a fast-paced software development firm. Worked on 10+ SQL database design projects. Improved speed to complete projects by 35% in 15 weeks. Developed and provided maintenance for 20+ .NET websites/applications, using ASP.NET MVC, jQuery, HTML, and CSS. Achieved 100% client satisfaction and on-time completion. Created remote coding and testing environment with bash and Docker scripts.

𝐄𝐱𝐩𝐞𝐫𝐭 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 with 7+ 𝘆𝗲𝗮𝗿𝘀 building scalable backend systems, AI-powered platforms, and enterprise applications designed for performance, maintainability, and long-term growth. My core is 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞, 𝐂#, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐅𝐚𝐬𝐭𝐀𝐏𝐈, and backend architecture built around scalability and clean system design. I also work across AI infrastructure, LLM integrations, and modern API-driven systems where backend reliability directly impacts business operations.  I've delivered SaaS platforms, ERP systems, AI-powered applications, RAG pipelines, enterprise APIs, and multi-service architectures where clean backend engineering and structured system design are critical for scaling successfully. Every system is built production-ready, optimized for performance, and designed to evolve without becoming difficult to maintain. ━━━━━━━━━━━━━━━━━━━━━━  𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝  ━━━━━━━━━━━━━━━━━━━━━━ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 & 𝐀𝐏𝐈 𝐒𝐲𝐬𝐭𝐞𝐦𝐬  ASP.NET Core, C#, Python, FastAPI, Django, Flask, REST APIs, microservices, async processing, authentication systems, business logic architecture, and scalable backend infrastructure. 𝐀𝐈/𝐌𝐋 & 𝐋𝐋𝐌 𝐒𝐲𝐬𝐭𝐞𝐦𝐬  LLM integrations, AI agents, RAG pipelines, NLP systems, chatbots, semantic search, recommendation systems, and intelligent backend services powered by OpenAI and modern AI frameworks. 𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 & 𝐄𝐑𝐏 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬  ERP systems, enterprise APIs, workflow automation, multi-service integrations, reporting systems, and backend platforms designed for operational scalability and reliability. 𝐉𝐚𝐯𝐚 & 𝐒𝐩𝐫𝐢𝐧𝐠 𝐁𝐨𝐨𝐭 𝐒𝐲𝐬𝐭𝐞𝐦𝐬  Java, Spring Boot, Spring MVC, Spring WebFlux, Hibernate, JPA, JSON processing, messaging services, and enterprise backend application development. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐒𝐲𝐬𝐭𝐞𝐦 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞  PostgreSQL, MySQL, MongoDB, query optimization, indexing strategies, scalable schema design, caching systems, and backend performance tuning. 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬  AWS, Azure, Docker, CI/CD pipelines, cloud-native deployment, infrastructure scaling, containerized services, and production environment management. '━━━━━━━━━━━━━━━━━━━━━━  𝐁𝐞𝐬𝐭 𝐅𝐢𝐭 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬  ━━━━━━━━━━━━━━━━━━━━━━ Backend-heavy SaaS platforms and enterprise systems  AI-powered products with LLM and RAG integrations  ERP and workflow automation systems  High-performance APIs and microservices  Cloud-native backend infrastructure  Systems requiring scalability, optimization, or modernization ━━━━━━━━━━━━━━━━━━━━━━  𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤  ━━━━━━━━━━━━━━━━━━━━━━ I focus on backend systems that are structured properly from the start architecture, APIs, databases, and infrastructure designed together instead of patched over time. Clear communication, predictable execution, and maintainable engineering practices are part of every project. I work closely with startups, SaaS teams, and enterprise clients to deliver backend systems that continue performing under real production load. 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 → 𝐀𝐏𝐈 𝐃𝐞𝐬𝐢𝐠𝐧 → 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐄𝐱𝐞𝐜𝐮𝐭𝐢𝐨𝐧 → 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 → 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 ━━━━━━━━━━━━━━━━━━━━━━ If you need an 𝐄𝐱𝐩𝐞𝐫𝐭 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 who can build scalable APIs, AI-powered systems, and production-grade backend infrastructure, let’s connect. ASP.NET Core | ASP.NET Web API | C# | .NET | Python | FastAPI | Django | Flask | REST APIs | Microservices | Backend Development | API Architecture | AI Integration | Machine Learning | LLM Applications | AI Agents | RAG Systems | Chatbots | NLP | OpenAI API | Semantic Search | Recommendation Systems | Java | Spring Boot | Spring MVC | Spring WebFlux | Hibernate | JPA | PostgreSQL | MySQL | MongoDB | Docker | AWS | Azure | CI/CD | Cloud-Native Applications | ERP Systems | SaaS Platforms | Workflow Automation | Enterprise Applications | System Design | Scalable Architecture | Async APIs | Software Architecture

Full Stack Web Developer, Backend C# Developer ( Angular, React, Vue ) 🔸 20 years of experience in developing business applications software 🔸 C# | .NET Core | ASP.NET MVC | REST API | Sockets 🔸 MS SQL Server | MySQL| PostgreSQL | MongoDB 🔸 Angular 2+, JavaScript, jQuery, SignalR 🔸 Azure DevOps | AWS 🔹 HTML5 | CSS | Bootstrap 🔹 ORM: Entity Framework | NHibernate | LLBLGen 🔹 NUnit | XUnit | MSTest 🔹 Source control: Git | SVN | TFS 🔹 Self-starter and can work independently, also a great team player.

Over the last 8+ years, I have developed a wide range of different applications using .NET Framework and .NET Core framework(ASP.NET Core 2+, ASP.NET MVC 3-5, WPF, WinForms, etc) and GHL and various UI development (React.js, Angular.js, JavaScript, JQuery, Bootstrap, CSS, Tailwind CSS, HTML, PHP, Laravel, etc). My goal is to participate in an interesting project and to establish a long-time collaboration with the customer. Experience and Skills: * 5+ years of experience as a QA Manual Tester. * 2+ years of experience in GHL, n8n Automation, AI integration, AI Agents • 7+ years of experience in analyzing, designing, developing, and maintaining web, Windows, N-Tier Object Oriented applications. • Experience in developing desktop applications using C#, WPF, Winforms, ADO.NET, Entity Framework. • Experience in ASP.NET, MVC, Ajax, jQuery, CSS, HTML, PHP, Laravel • Experience in working on Design Patterns & Practices like MVC, MVP, and MVVM. • Experience in developing n-tier C# applications. • Experience in developing Data Access Layers using various ORM and native libraries: Entity framework 6+, Entity framework core, bltoolkit, dapper, ADO.NEt • Experience in complex data collection and analysis for automating processes • Ability to take and give directions and instructions, and provide assistance through the completion of tasks. • Strong analytical and problem-solving skills.

Highly experienced and skilled in linux system, linux kernel and linux system programming. I had served in NXP semiconductor for 7 years, and worked in linux field for more than 15 years. Linux Kernel - Subsystem: KVM Virtualization, Filesystem, Network, USB, Linux Video - Debugging: Performance, System Analysis, Software Debugging, OOPS Embedded Linux - Frameworks: OpenWRT, Yocto, Android - Device Driver: USB, XHCI, WIFI, LTE, Network, Camera Linux System Development - System: Ubuntu, Centos, Archlinux, Raspberry pi, Orange pi - Network: VPN, VXLAN, IPTABLE, Router, Wireguard - Virtualization: Qemu, Libvirt, Virtualbox, Docker, K8s Programming Skills - C/C++ - Bash/Makefile - Android - Python

Are you looking for a reliable ASP.NET Core developer who can build, optimize, and troubleshoot real-world applications? I help businesses develop secure, scalable, and production-ready solutions using ASP.NET Core, Angular, SQL Server, and modern API integrations. With 8+ years of professional experience, I specialize in backend development, REST APIs, third-party integrations, and performance optimization. Whether you need a new application, API integration, bug fixes, or system improvements, I can help deliver reliable and maintainable solutions. 🔹 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐈 𝐏𝐫𝐨𝐯𝐢𝐝𝐞 ✔ ASP.NET Core Web API & MVC Development ✔ Angular Development & Frontend Enhancements ✔ SQL Server Design, Optimization & Performance Tuning ✔ API Integration & Troubleshooting ✔ Stripe Integration (Payments, Subscriptions, Webhooks) ✔ Third-Party Integrations (Twilio, SendGrid, Payment Gateways) ✔ Authentication & Authorization (JWT, Identity) ✔ Deployment & Production Support (IIS, Azure) 🔹 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✔ ASP.NET Core, C#, Web API, MVC ✔ Angular, TypeScript, JavaScript ✔ SQL Server, EF Core, Dapper ✔ REST APIs & Third-Party Integrations ✔ Clean Architecture, CQRS, SOLID Principles ✔ Secure Application Design & Best Practices I focus on delivering clean, maintainable, and scalable solutions that support long-term business growth. My approach combines strong technical expertise, clear communication, and a commitment to quality. Available for ongoing development, API integrations, troubleshooting, and urgent fixes. Send me a message with your requirements, and I'll be happy to discuss the best solution for your project.

⭐⭐⭐⭐⭐ Top Rated | 10+ Years Experience ⭐⭐⭐⭐⭐ I help businesses fix, optimize, and scale desktop applications and databases—especially ERP systems, accounting integrations, and legacy software. If your application is slow, your database is underperforming, or your system requires manual work, I can turn it into a fast, reliable, and automated solution. 🔥 What I specialize in: C# / VB.NET Desktop Application Development (WinForms, DevExpress) SQL Server performance tuning & query optimization ERP & Accounting Systems (Inventory, GST, Reporting) QuickBooks Desktop Integration (QB SDK, automation, sync) Fixing slow applications caused by database or code issues Excel/VBA → .NET Application or DLL Conversion API integrations & system synchronization Auto-updaters (Application + Database migration) Industrial systems (Serial Port, Bluetooth, real-time control) 💡 Proven real-world experience: ✔ ERP system for diamond industry (high-volume transactions) ✔ Optimized SQL performance for business-critical systems ✔ ZATCA Phase 2 e-invoicing system (Saudi compliance) ✔ Real-time monitoring dashboard (15+ manufacturing plants) ✔ Coffee roaster control software (hardware + real-time system) ✔ QuickBooks automated order & invoice sync ✔ Bulk email automation system (Google API integration) ✔ Excel VBA converted to scalable VB.NET DLL ✔ API-based auto-update system with database upgrades ⚡ Why clients hire me: I solve both application and database problems (end-to-end) Strong experience with real-world business systems (ERP) I quickly identify performance bottlenecks and fix them Focus on speed, stability, and long-term scalability 🛠️ Core Technologies: C#, VB.NET, WinForms, DevExpress, SQL Server, T-SQL, APIs, QB SDK 🎯 What you can expect: ✔ Faster applications and optimized database performance ✔ Clean, maintainable, production-ready code ✔ Reliable and scalable system architecture ✔ Clear communication and fast turnaround If your system is slow, outdated, or needs automation—I can quickly analyze, optimize, and deliver a stable solution. 🎥 I can also share working demos of similar systems.

I have 15+ years of industry-proven experience with a traceable success story to develop applications in Python, Node.js, React, Angular, AI frameworks,.Net and JS libraries. I specialise in designing and implementing scalable APIs. My tech stack Expertise: ✅Python, Django, Flask, Scrapy, Pytest, Node ✅ASP.NET Core, .NET MVC, .NET Angular, C# ✅OpenAI, Gemini, Claude, and Cursor AI ✅ReactJS, VueJS, NextJS, Typescript, JavaScript, jQuery ✅Databases & Servers: Redis, SQLAlchemy, NoSQL, MS SQL Server, Prisma ORM ✅APIs: Slack API, Swagger, Google APIs, Stripe, GraphQL, RESTful APIs, Open APIs ✅AWS (EC2, S3), GitHub, GitLab, Bitbucket Clients' Feedback 👍"Kashif is extremely reliable and flexible and works out of his way to ensure the task allocated is completed. Would love to continue working on future Python projects and highly recommend him to others looking for a reliable Python export as well. ===== 👍"Kashif is very reliable, professional, and flexible. He is genuine and really goes above and beyond to ensure work is done to the standards expected. We would love to work and hire him again if an opportunity for any backend development in Python comes up. We wish you all the best in your future endeavors, Kashif and hope to work with you again soon. ===== 👍"Kashif and the Team's communication was top-notch, they met all deadlines, and their skills were exceptionally strong. I enjoyed working with them. They are very dedicated and take pride in their code. I would strongly recommend the freelancer for any software development projects." Keywords: .NET Developer, Python Developer, Full-Stack Developer