Md. Mostafizur R.

I help businesses build scalable SaaS platforms, modernize legacy applications, and integrate AI into real-world workflows. 💻 I am a senior full-stack developer specializing in stepping directly into live codebases, shipping production-ready features, fixing complex bugs, and building custom AI workflows with zero hand-holding. I focus on delivering clean, maintainable code that keeps your product moving forward smoothly. Whether you need a reliable senior engineer to build features from scratch, stabilize a legacy .NET codebase, or build advanced RAG and AI agent systems, I deliver dependable code with minimal friction. 🔹 Core Technical Stack 🏆 Backend & APIs: .NET 8/9, ASP.NET Core, C#, SQL Server, Entity Framework Core, REST/GraphQL, Clean Architecture. 💻 Frontend Development: React, Angular, Blazor, TypeScript, Tailwind CSS, State Management (Redux/NgRx). 🧠 AI & Automation: RAG Pipelines, LangChain, LangGraph, CrewAI, Multi-Agent Workflows, Vector DBs (Pinecone, Qdrant), OpenAI API. 🚀 Cloud & DevOps: Microsoft Azure, AWS, Docker, CI/CD Pipeline Automation (GitHub Actions, Azure DevOps). 🕒 Availability & Communication I am available for full-time, long-term engagements. I offer flexible hours to ensure seamless overlap with US, UK, and EU time zones for daily stand-ups and team collaboration. 💬 What Clients Say "Mostafizur is extremely professional, cooperative, and creative... Highly recommended for full-stack development." "Great engineering resource for over 5 years." 📩 Next Steps Looking for a dependable senior engineer to join your team? Click Invite to Job or send me a message. Let's jump on a quick call to discuss your technical roadmap!