I will add ai chat and openai features to your web app

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luowenfeng_dev
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luowenfeng_dev
LuoWenFeng

About this gig


Need AI in your app, or a web app someone actually finished? I build both.


I'm a .NET full-stack developer working with C#, ASP.NET Core, SQL Server and Vue/React. Most of my recent work is adding AI to existing products: chatbots, document search, and LLM features that plug into what you already have.


What I can do for you:

- Add an AI feature to your existing web app (OpenAI, Azure OpenAI, Claude, or any LLM API)

- Build a chatbot for support, sales or internal use

- Build or extend a functional web app

- Fix and improve an app someone else left half-done


How I work: we start with a short chat. I'll tell you honestly if it's a good fit and what it costs, then build in small steps and show progress, so nothing is a surprise at the end. You get clean, readable code and the source files.


FAQ


Q: Which AI providers do you use?

A: OpenAI, Azure OpenAI, Anthropic, or open-source models via API. If you already have one, I'll use it.


Q: Do I get the source code?

A: Yes, on Standard and Premium. On Basic it's a small add-on.

Get to know LuoWenFeng

LuoWenFeng

FullStackDeveloper

  • FromChina
  • Member sinceOct 2026
  • Languages

    Chinese
I'm a .NET full-stack developer. I build web apps, internal tools and APIs with C#, ASP.NET Core and SQL Server, with Vue or React on the front end. Typical work: adding features to existing systems, fixing slow queries, integrating third-party APIs and payment gateways, and taking small apps from idea to launch. I also have hands-on AI experience, mostly adding OpenAI/ChatGPT features and RAG-based search and chat into existing products. I reply quickly, keep you posted, and write code the next developer can actually read. Not sure what you need yet? Message me and we'll figure it out.

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