Usman J.

.NET Core Backend Engineer / Azure Cloud Architect / AI Integrations

🚀 Helping Startups & Businesses Build Scalable Web & Cloud Applications (8+ Years Experience) ❌ Are slow APIs, complex integrations, database bottlenecks, or hard-to-scale systems holding your business back? With 8+ years of experience, I help companies design, build, and modernize high-performance web applications, SaaS platforms, backend systems, and cloud-based solutions using .NET, ASP.NET Core, C#, Azure, and modern frontend technologies. 📈 Where I have delivered results: 💥 Reduced API response times from 4s to under 300ms on an enterprise eCommerce platform 💳 Built a SaaS subscription system handling autoship, billing cycles, and refund workflows 🔄 Migrated legacy ASP.NET MVC system to .NET Core for a US franchise management company 🏗️ Designed microservices architecture for a lead management platform serving 50k+ records 🛠️ Core Skills & Tech Stack: • Backend: .NET Core, ASP.NET Web API, C#, Microservices, Entity Framework Core, SignalR, Blazor • Cloud & DevOps: Microsoft Azure, Azure Functions, Azure DevOps, Cloud Automation, CI/CD, Docker • Frontend Ecosystem: React, Angular, TypeScript, Next.js, Node.js • AI & Automation: OpenAI API integration, AI Agent workflows, Custom LLM connectors • Databases: MS SQL Server, PostgreSQL, MySQL, MongoDB, Redis Caching, Performance Tuning • Integrations: REST API, SOAP API, Payment Gateways (Subscription billing, Tokenization) 🎯 Key Strengths / Expertise: • Building scalable ASP.NET Core APIs with complex business logic • Optimizing slow APIs, database queries, and backend performance issues • Designing clean, maintainable, enterprise-grade .NET architecture (DDD & SOLID) • Developing admin panels, dashboards, internal tools, SaaS portals, and workflow automation • Working across legacy and modern .NET systems (ASP.NET MVC, Web Forms, WinForms, Razor Pages) • Leading projects independently or collaborating seamlessly with existing engineering teams 💡 What You Can Expect: You can expect clear communication, strong technical ownership, clean code, reliable delivery, and a problem-solving mindset. I do not just write code; I help identify the right solution, reduce technical friction, and build systems that support business scale. 🗓️ Availability & Engagement: • Open for both part-time and full-time engagements • Flexible overlap with US/EU working hours DM me anytime, I respond quickly and am available for calls, technical architecture discussions, and project planning!