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$
USD
I will integrate ai into your service or application
Luis Castel
About this gig
Are you struggling to add AI capabilities to your application? I'll integrate Claude or OpenAI API into your Python or web app quickly and cleanly.
What I deliver:
Claude API or OpenAI API integration
Custom system prompt engineering
FastAPI or Flask backend endpoints
Clean, documented, production-ready code
Testing and validation of all endpoints
My background: I've built RAG systems, distributed LLM platforms, and AI-powered applications using FastAPI, GCP, and the Anthropic/OpenAI stack. I use Claude Code daily I ship fast without cutting corners.
Perfect for:
Startups adding AI features to existing apps
Developers who need a working AI backend fast
Businesses wanting a custom chatbot or AI assistant
Standard and Premium packages include RAG (document Q&A) and database integration.
Message me before ordering if you have questions about your specific use case.
Get to know Luis Castel
Luis Castel
I will build AI solutions for your company
- FromColombia
- Member sinceMay 2026
Languages
Spanish, English
Software Engineer specialized in AI/LLM integration and backend development. I build production-grade RAG systems, Claude/OpenAI API integrations, and FastAPI backends that work in production — not just demos.
My projects include UnaCloud (distributed LLM inference on a 39-node HPC cluster), NotebookLMini (RAG system with FastAPI + Qdrant + Gemini), and Lala AI (multimodal AI platform). Stack: Python, FastAPI, Docker, GCP, PostgreSQL, Claude/OpenAI APIs.
I ship fast and clean. If you need AI integration built to last, I'm your engineer.
My Portfolio
FAQ
What information do I need to provide to get started?
A description of what you want the AI to do and access to your codebase or tech stack details. You never need to share your API key directly — I'll build the integration so you insert your own key into a secure environment variable. Your credentials stay with you at all times.
Do you work with frameworks other than FastAPI?
Yes. I can integrate with Flask, Django, or a plain Python script. For frontend integrations I can work with Next.js or any app that consumes a REST API.
Will I own the code?
Yes. You receive full source code with every package. No lock-in, no dependencies on me to keep it running.
What if I don't have an existing app?
The Standard and Premium packages include building the backend from scratch. Message me before ordering so we can scope it correctly.
How do you handle my data securely?
I work with environment variables and .env files — no credentials are ever hardcoded. All sensitive data stays on your infrastructure. I sign NDAs on request before any code or data is shared.
Can you deploy the integration for me?
Yes, deployment on GCP Cloud Run or AWS is included in the Premium package. For other platforms, message me first and we can discuss.
