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I **define the architecture**. For 21 years, I've been the person CTOs and lead developers call when systems fail under load, migrations are at risk, or AI integration needs to work right the first time. With expertise in **C#, .NET, Blazor, ASP.NET Core, SQL, Python,** and production AI agents (**Semantic Kernel, LangGraph, custom tool-calling**), I design systems where performance, reliability, and intelligent automation aren't optional—they're the baseline. I've shipped AI to **production** — not to a Jupyter notebook. I'm the creator of **FreeAIVoice** — a live AI voice platform with AI Voice Generation, Voice Cloning, and Speech-to-Text across **30+ spoken languages** and a developer API. I provided production systems for The New York Times. --- **Here's where I'm most useful to you:** - **The AI Integration Trap** — You've been asked to add AI to your existing .NET system but don't know whether to use *Semantic Kernel*, raw OpenAI APIs, or a Python sidecar. I've made that decision dozens of times. I'll make it faster and safer for you. - **The Blazor Bottleneck** — Your Blazor app is slow, state management is tangled, and you're unsure if you chose *Server or WASM* incorrectly. I can diagnose what went wrong and map a clean path forward — often in a single session. - **The Legacy Modernization Cliff** — You have a 10-year-old .NET system that needs AI or modern tooling but wasn't designed for it. I specialize in *incremental refactoring paths* that don't require a full rewrite and don't break what's already working. --- **What I Do Best:** - **Software Architecture & System Design** — scalable, maintainable systems from greenfield to enterprise - **AI Agent Development** — production-grade agents with Semantic Kernel, LangGraph & AutoGen — *not demos* - **Blazor & ASP.NET Core** — Server, WASM, hybrid — full-cycle development and performance tuning - **Python & AI Automation** — RAG pipelines, workflow automation, voice AI, LLM integrations - **Legacy .NET Modernization** — refactoring strategy, migration paths, incremental upgrades - **Architecture Audits** — identifying structural risk before it becomes a production incident, not after - **Debugging Complex Systems** — when the stack trace doesn't tell the whole story **If any of this sounds like your current situation — DM me. I respond to every message.**
Senior full-stack engineer and architect specialising in **React, TypeScript and Node.js**, with extensive experience delivering **complex, high-pressure products** across startups, agencies and regulated environments. Known for **simplifying hard problems**, shipping reliably under constraints, and bridging architecture with hands-on implementation. Regularly brought into early-stage or at-risk projects to unblock delivery, establish technical direction, and raise engineering standards.
Worked in the field for 3 decades for mom and pop shops to fortune 500 companies. I am seeking a full time position with a company as a backend, CFML programmer which is where I feel most comfortable with my more than 3 decades of coding experience. I would require a remote position, however, I am open to adjusting my waking hours to any time zone.
Power Apps Python Data Science Artifical Intelligence (graduated) Visual Studio developer (MVC, MVVM, C#, webservices, mobile integrations) MCSA, MCSE, MCDBA Oracle Business Intelligence Analyst T-SQL (SQL Server) and PL-SQL (Oracle) Android, iOS, Windows phone developer Arduino skills
I have worked at large corporations, startups, and consulting companies. Challenges excite me, and I love helping people learn to solve their own problems with technology. My last 11 years have been focused on GIS development, but I still write software just the same. Happy to help, what're we waiting for?
Languages: English only I am Senior Software Developer specialising in C#, .NET, .NET Core, SQL and mentoring junior developers. I'm from England, UK and I graduated from university in 2014 with a 2:1 BSC degree in Computing. If you need any help with anything, drop me a message and we can arrange a call and screen sharing session over Zoom.
I am an expert C++, Python, Golang developer with over eight years of experience. I am highly talented and skilled in problem-solving and understanding complex and large codebase.
I've been doing development in software (primarily .NET) and on the web professionally since 1997. I've primarily focused on the Microsoft stack (C#, ASP.NET, MSSQL, IIS, etc), but complementing this I am also very strong in front-end development with HTML, CSS, and Javascript. My expertise does *not* extend to non-.NET server frameworks. I've worked with some of the other server frameworks but I'm not expert in them.
Senior Software Engineer | Full Stack Senior .NET Developer with over 20 years of experience in both greenfield and brownfield development, designing, developing, and optimizing complex, scalable applications across legal, healthcare, government consulting, retail workforce management, benefits administration, and programmatic media advertising. Proven ability to lead teams, mentor developers, and implement solutions for complex systems while adhering to best practices and modern design patterns
Sébastien Arnaud is a French Software Architect, Engineer, and Inventor. With a passion for Data Science, in particular Machine Learning, General Game playing, Natural Language Processing and Text Analytics, Sébastien is an entrepreneur, who loves turning ideas into products, data into insights.
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