Hire the Best .NET Core Developers in Kuala Lumpur, MY

Results-driven Full Stack Developer with 12+ years of experience specializing in .NET, C#, React, Python, and scalable web applications. Passionate about building high-performance systems, optimizing user experience, and leading full-cycle software projects. 💡 Expertise in: ✔ Developing and optimizing scalable, secure, and high-traffic applications ✔ Leading projects from concept to deployment, ensuring top-notch performance ✔ Problem-solving & troubleshooting complex software challenges ✔ Collaborating across teams to align technology with business goals ⚡ I thrive in fast-paced environments, solving challenging problems, and leveraging cutting-edge tech to create impactful digital solutions. Let’s connect!

Full Stack .NET Developer with 7+ years of experience building scalable web applications, business platforms, and cloud-based solutions using ASP.NET Core, C#, SQL Server, React, Vue.js, and Microsoft Azure. I specialize in: ✅ Enterprise web applications with complex business workflows ✅ Custom CRM & ERP systems development ✅ High-performance REST APIs and backend services ✅ Cloud-native applications deployed on Microsoft Azure ✅ Modern frontend development with React, Vue.js & Angular ✅ Database architecture, optimization & reporting solutions 🔧 What I have shipped: • Developed a custom ERP platform that automated inventory management, order processing, and financial reporting, significantly reducing manual operational workload. • Built secure ASP.NET Core Web APIs integrated with third-party payment gateways, external business services, and enterprise systems. • Engineered a cloud-hosted CRM solution with role-based access control, customer tracking, workflow automation, and real-time reporting dashboards. • Delivered modern single-page applications using React and Vue.js, improving user experience and application responsiveness across desktop and mobile devices. • Designed and optimized SQL Server databases, stored procedures, and reporting systems for high-volume business applications handling large datasets. • Deployed and maintained production applications on Microsoft Azure using App Services, Azure SQL Database, Storage Accounts, and CI/CD pipelines. 🛠 Technologies I work with daily: Backend: ASP.NET Core, ASP.NET MVC, C#, .NET Framework, Web API Frontend: React.js, Vue.js, Angular, JavaScript, TypeScript, Bootstrap Database: Microsoft SQL Server, Entity Framework, LINQ, Stored Procedures Cloud & DevOps: Microsoft Azure, Azure App Services, Azure SQL, Azure Storage, Azure DevOps, CI/CD Architecture: REST APIs, Microservices, Authentication & Authorization, Role-Based Access Control 📌 What clients value about my work: • Clean and maintainable code • Scalable application architecture • Reliable API development • Performance-focused database design • Clear communication and on-time delivery • Long-term support and collaboration Whether you need a business application built from scratch, a legacy .NET system modernized, a cloud migration to Azure, or a new feature added to an existing platform, I can help deliver a reliable, production-ready solution. Let's discuss your project.

As a seasoned Web Application Developer with over 15 years of experience in the industry, I offer a range of services, including fixing front-end and back-end issues, building brand new ASP.NET/Core websites and APIs from scratch, and customizing existing websites to meet unique needs. With a strong background in ASP.NET Core 6, I bring expertise in high-quality, reusable code and custom solutions to clients. Additionally, I am a specialist in Sitecore and Sitefinity CMS, having developed numerous public-facing websites and integrating the CRM with Sitefinity CMS using The Portal Connector. Effective communication is key to my approach and I believe in working closely with clients to ensure their needs are met. I utilize cutting-edge technologies and frameworks, including Asp.net Web API, Asp.net MVC, Asp.net Core, Asp.net SignalR, Asp.net Core Rest API, Entity Framework + LINQ, Bootstrap, MSSQL, store procedures, HTML, CSS, JavaScript, and C# Full Stack Development to deliver outstanding results. I encourage clients to reach out to me prior to starting any project to discuss their specific requirements and the technical details of their environment. Please keep in mind that pricing is just an estimate and may vary based on the complexity of the project. I look forward to the opportunity to collaborate with you and provide a precise quote.

For the last 13+ years, I’ve helped startups and companies grow their revenue by building scalable web apps, enterprise-grade .NET systems, AI automation, Shopify, E-Commerce and market-competitive MVPs with eye catching UI/UX. ✅ Top 10% Full Stack Developer ✅ 90%+ Client Success Score ✅ 250+ Projects Delivered Successfully ✅ $60,000+ Earned on Upwork Here’s what I deliver: ✔️ Full-Stack SaaS & Web Development (React, Next.js, Node.js, .NET Core) – Modern SaaS apps and dashboards using React.js, Next.js, Node.js, ASP.NET Core, with real-time features, APIs, and third-party integrations. ✔️ Enterprise .NET Applications & APIs – High-performance ASP.NET MVC / .NET Core applications, secure Web APIs, microservices, and scalable backend systems for business-critical platforms. ✔️ AI Automation & Agentic Workflows – Multi-step pipelines, task orchestration, and agentic decision-making with n8n, Make, and AI-powered workflow systems. ✔️ AI Calling & Voice Agents – Smart voice assistants for sales, healthcare, support, and follow-ups, powered by OpenAI, Gemini, Claude, Grok, DeepSeek. ✔️ E-commerce & AI Solutions – Intelligent online stores with automated workflows, personalized recommendations, and customer engagement systems. ✔️ Healthcare & Fitness Applications – AI health assistants, fitness trackers, and HIPAA-compliant healthcare platforms with intelligent automation. ✔️ Crypto Trading Bots & Automation – AI-powered bots, strategy automation, and real-time monitoring dashboards for crypto trading. ✔️ Databases & Backend Optimization – Reliable, high-performance backend systems using SQL Server, MongoDB, and MySQL, optimized for scalability and maintainability. 🌟 Recent Client Feedback: "Usman delivered high-quality results on time and met all requirements. I highly recommend him for ReactJS and frontend development work." 💬 Let’s book a FREE consultation call to discuss your project. I’ll share a custom AI, .NET, or SaaS roadmap to help you launch faster.

• Have 7 years of experience in .NET Technologies (ASP.NET MVC 5, VB.NET, ASP.NET Web Forms, .NET Core 6, ASP.NET/.NET Core Web API). • Experienced with authentication and authorization .NET Web API with JWT. • Have experience with developing n-layer architecture applications, Clean architecture (UI Layer, Business Logic Layer, Data Access Layer, Cache Layer, Repository Layer etc.). • Experienced with Windows Service (Creating Web Scraper) and Parse HTML Web pages using Html Agility Pack. • Experienced with .NET Core Background Service, Middleware, and in-depth knowledge of .NET scoped, singleton and transient service. • Experienced with JSON and XML parsing. • Experienced with deploying and hosting web apps .NET on Google Cloud Platform in Windows Virtual Machine and used google services in .NET apps like localization, vision AI, reCaptcha, Google Cloud Functions, Cloud SQL, Google Scheduler, Firestore., Google Secret Manager to store secret keys. • Worked with MSSQL Server, writing SQL Queries, DB Functions, Cursors, and Stored Procedures. • Experienced with Entity Framework 6 with LINQ Queries and DB First approach and ADO.NET and also Dapper and DevExpress(.NET ORM) to Access MSSQL Server Database. • Languages knowledge C#, JavaScript, Java, Python. • Strong OOP concept (Abstraction, Encapsulation, Inheritance, Polymorphism) • Knowledge of Design Patterns (Singleton, Dependency Injection, Factory Method, Adapter Pattern) • Worked with Multithreading in Web Applications and also used TPL. • Worked with Redis Cache with .NET and Signal R. • Document Web APIs with Swagger Documentation Tool. • Analysis Requirement Specific Document and then Developed Functional Specific Document. • Optimize application performance using Google Page Speed Insights. • Worked with MongoDB using .NET Mongo Client. • Skilled in Git, Bitbucket, TortoiseSVN and TFS. • Experienced with integrating payment processing gateway to a website such as Stripe and PayPal. • Integration of Twillio SMS API and SendGrid Email API for OTP Code in .NET. • Integration of Open AI ChatGPT and DALL-E API in Web Application. • Migrated Applications from ColdFusion to Asp.Net Core. • Experienced with Azure Devops to building and deploying apps, board managing,branches and pull requests. • HTML, CSS, jQuery, Bootstrap Libraries • Experienced with developing cross platform mobile apps with React Native Platform. • Experienced with build front-end web applications using ReactJS library. • Experience with Microsoft Power Pages and Power Apps.

Certifications: 1. Exam AZ-203: Developing Solutions for Microsoft Azure 2. TS: Querying Microsoft SQL Server 2012 3. TS: Windows Communication Foundation Development with Microsoft .NET 4. Certified Sitecore 10 Developer I am a hands-on, highly competent software developer with 15 years’ experience. A specialist in .NET and Sql Server, I take pride in coding to consistently high standards and regularly refresh my skills to ensure I keep up with ongoing developments. I'm aware of the main software development principles, like SOLID. During the last 15 years, I built a lot of websites ( ASP .NET WebForms, ASP .NET MVC), desktop applications (mainly in .NET) and backend services. Also, have experience in database design. Recently I have worked on frontend technologies like AngularJS. I am fond of finding the most accurate and optimal solution for any request, and I hope you will be the next one to experience that with satisfaction. Databases: MSSQL, Flat files (CSV, XML) Tools / Frameworks: ASP.NET MVC / Web Forms / Web API, Telerik Web Forms, Kendo, Ninject, Unity, Nhibernate, Entity Framework 5, JQuery, Jquery UI, Nuget amongst others. Reporting Tools: SSRS, SAP Crystal Reports Source Control: SVN, TFS, BitBucket, Git API's: Facebook, Dailymotion, Canon, Nikon, Linkedin, Twitter, QlikSense, LiquidFiles and more. Patterns & Practices: Ntier development, IoC, Separation of Concerns, MVC, MVVM