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$
USD
I will integrate chatgpt, claude or gemini ai into your app or desktop software
Matthew C.
About this gig
I integrate Claude, ChatGPT and Gemini into apps that already exist.
Most AI integration work fails in the same three places: streaming that stalls, API keys sitting somewhere they shouldn't, and no retry logic when a provider returns a 429. I handle those first, because that's what makes the difference between a demo and something you can ship.
What I work with
- Claude (Anthropic), OpenAI and Gemini APIs
- React, TypeScript, Node
- Rust and Tauri for desktop applications
- SQLite and local-first architecture
What you get
Working code in your repo, commented well enough that another developer can pick it up. Streaming responses, conversation storage, sane error handling, and your keys kept out of the client bundle. Source code included on every package.
Recent work
I built a Tauri desktop application that runs Claude, ChatGPT and Gemini side by side and merges two providers' answers into a single response multi-provider streaming, key management, local SQLite storage. Screenshots are in the gallery.
Before you order
Message me with what you're building and I'll tell you honestly which package fits, or that I'm not the right person for the job.
Get to know Matthew C.
Matthew C.
Helping people feel less overwhelmed and more clear about their next step
- FromUnited States
- Member sinceMar 2026
- Avg. response time1 hour
Languages
English, Spanish
Hi, I'm Matthew. I build desktop applications and wire AI models into them.
Most of my work sits at the intersection of two things: native desktop development with Tauri, Rust and React, and integration with the Claude, OpenAI and Gemini APIs. I built a desktop app called The Roundtable that runs all three models side by side, detects where their answers conflict, and puts them into structured debate rounds — multi-provider streaming, key handling, local SQLite storage. You can see it in my gig gallery.
If you're not sure whether your project is a fit, message me and I'll tell you straight.
My Portfolio
FAQ
Do you work with an existing codebase?
Yes, that's the main thing I do. Send me the repo or the relevant files and I'll tell you what the integration looks like before you order.
Whose API keys are used?
Yours. You keep your own provider account and billing. I'll set up the key handling so they aren't exposed in the client.
Can you fine-tune a model?
No — this gig covers integration, not training. Fine-tuning needs a prepared dataset and is a separate scope. Message me and I'll point you in the right direction.
