Shoaib R.

**TOP RATED PLUS | $300K+ Earned | 13,000+ Hours on Upwork** I help SaaS companies and enterprise teams build, modernize, and maintain .NET applications using ASP.NET Core, React, Angular, SQL Server, Azure, and AWS. I’m a Senior Full-Stack .NET Developer with 9+ years of experience working on SaaS platforms, enterprise web apps, healthcare systems, ERP tools, internal portals, APIs, and cloud-based products. Clients usually hire me when they need someone who can take over an existing product, understand the codebase quickly, fix issues, improve performance, build new features, and keep the system stable. I can help with: • ASP.NET Core, ASP.NET MVC, .NET Framework, and C# • React, Angular, JavaScript, and TypeScript • REST APIs, webhooks, and third-party integrations • SQL Server database design, queries, and optimization • Azure, AWS, cloud deployment, and CI/CD pipelines • Microservices and backend architecture • Legacy .NET modernization and codebase takeover • Bug fixing, refactoring, and performance improvement • Healthcare, ERP, SaaS, internal business tools, and workflow systems • Practical AI/API integrations for product features or internal operations **Core technologies:** .NET, ASP.NET Core, Web API, C#, React, Angular, TypeScript, SQL Server, MongoDB, MySQL, Azure, AWS, GCP, REST APIs, Microservices, Azure DevOps, CI/CD. **Key achievements:** • Delivered 20+ enterprise web applications using ASP.NET Core, React, and Angular • Optimized .NET APIs and SQL Server queries, reducing response times by up to 60% • Built backend systems handling 1M+ monthly API requests • Designed cloud-based architectures on Azure and AWS supporting 10K+ active users • Completed 13,000+ hours on Upwork across long-term enterprise contracts My focus is simple: clean code, stable systems, clear communication, and software that keeps working after launch. If you need a senior developer to build, fix, improve, modernize, or take over a .NET, React, or Angular application, I can help.