Usman J.

𝗦𝗲𝗻𝗶𝗼𝗿 .𝗡𝗘𝗧 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗔𝘇𝘂𝗿𝗲 𝗖𝗹𝗼𝘂𝗱 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 helping startups and businesses build scalable SaaS platforms, high-performance backend systems, and secure cloud applications. 𝟴+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 | 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 | 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸. Struggling with slow APIs, database bottlenecks, legacy .NET applications, or complex cloud deployments? I help businesses solve these challenges with scalable .NET architecture, optimized databases, seamless API integrations, and Microsoft Azure solutions. 𝗪𝗛𝗔𝗧 𝗜 𝗛𝗔𝗩𝗘 𝗗𝗘𝗟𝗜𝗩𝗘𝗥𝗘𝗗: • Optimized an enterprise eCommerce API, reducing response times from 4 seconds to under 300 milliseconds. • Built a SaaS subscription system with automated billing cycles, autoship functionality, and refund workflows. • Migrated a legacy ASP.NET MVC application to .NET Core for a US-based franchise management company. • Designed a microservices architecture for a lead management platform handling 50K+ records. 𝗠𝗬 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦: 𝗖𝘂𝘀𝘁𝗼𝗺 .𝗡𝗘𝗧 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Build secure, scalable web applications using C#, ASP.NET Core, .NET MVC, Razor Pages, and Entity Framework Core. 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲 𝗔𝗣𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Develop high-performance RESTful APIs, backend services, and third-party integrations with clean, maintainable code. 𝗦𝗮𝗮𝗦 & 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Create SaaS platforms, subscription management systems, enterprise applications, and modular microservices tailored to your business requirements. 𝗔𝘇𝘂𝗿𝗲 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀 Deploy and modernize applications using Microsoft Azure, Azure Functions, Azure DevOps, Docker, and CI/CD pipelines. 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗗𝗲𝘀𝗶𝗴𝗻 & 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 Design efficient databases, optimize SQL queries, and resolve performance issues using Microsoft SQL Server, PostgreSQL, MySQL, MongoDB, and Redis. 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗪𝗲𝗯 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Build full-stack applications using React, Angular, TypeScript, JavaScript, Next.js, HTML, CSS, and Bootstrap, integrated with .NET backends. 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 Integrate OpenAI APIs, LLM-powered features, payment gateways, and third-party services into existing applications to support business workflows. 𝗟𝗲𝗴𝗮𝗰𝘆 𝗦𝘆𝘀𝘁𝗲𝗺 𝗠𝗼𝗱𝗲𝗿𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻 Upgrade legacy ASP.NET applications, fix complex bugs, refactor code, and improve application performance and maintainability. 𝗠𝗬 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞: • Backend: C#, ASP.NET Core, .NET, ASP.NET MVC, Web API, Entity Framework Core, Razor Pages, Blazor, SignalR • Cloud & DevOps: Microsoft Azure, Azure Functions, Azure DevOps, Docker, CI/CD • Frontend: React, Angular, Next.js, TypeScript, JavaScript, HTML5, CSS3, Bootstrap • Databases: Microsoft SQL Server, PostgreSQL, MySQL, MongoDB, Redis • Architecture: Microservices, RESTful APIs, SaaS Architecture, SOLID Principles, Domain-Driven Design • AI & Integrations: OpenAI API, AI Integration, Payment Gateways, Third-Party APIs 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗛𝗜𝗥𝗘 𝗠𝗘: • 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 and Top Rated status on Upwork. • Proven focus on API performance, scalable architecture, and database optimization. • Experience with modern .NET applications, legacy systems, and cloud solutions. • End-to-end ownership from requirements analysis to implementation and deployment. • Clear communication, proactive problem-solving, and maintainable code. 𝗛𝗢𝗪 𝗪𝗘 𝗦𝗧𝗔𝗥𝗧: 𝗦𝗵𝗮𝗿𝗲 𝗬𝗼𝘂𝗿 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀 — Explain your project goals or technical challenges. 𝗗𝗲𝗳𝗶𝗻𝗲 𝗧𝗵𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻 — Agree on the technology stack, scope, and milestones. 𝗕𝘂𝗶𝗹𝗱 & 𝗗𝗲𝗹𝗶𝘃𝗲𝗿 — Develop, test, and refine your solution with clear communication. 𝗟𝗘𝗧'𝗦 𝗧𝗔𝗟𝗞: Need a reliable .NET developer to build a new application, optimize your backend, modernize legacy software, or integrate AI into your product? Send me a message with your requirements, and let's discuss the right technical solution for your business. Usman | .NET Developer | ASP.NET Core | C# | Azure Cloud | AI Integration