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alexr2212

Alex R

@alexr2212

AI Developer for RAG Chatbots and Python

Germany
German, English
About me
I build AI chatbots that answer from your own documents: with sources, an honest "that's not in your documents" and a test report that shows how often they are right. I'm a freelance AI developer (Python) working with RAG, LangGraph, the OpenAI, Claude and Gemini APIs, MCP, FastAPI and Docker. I built four features that are now part of PydanticAI, an open-source AI framework with over 20 million monthly downloads. I speak German and English. Tell me about your documents and I'll suggest the right package.... Read more

Skills

a
alexr2212
Alex R
Offline • 

See my services

AI Chatbot Development
I will build a tested custom ai chatbot with rag for your website
From$35 / projectMore details

Portfolio

Work experience

Self-Employed_/ Freelancer

Self-Employed / Freelancer

Freelance • 4 mos

Freelance AI Developer

Aug 2026 - Present • 2 mos

I build AI chatbots that answer from a client's own documents, with sources (file and page), an honest "that's not in your documents" and a test report that shows how often the answers are right. Python, RAG, LangGraph, LangChain, the OpenAI, Claude and Gemini APIs, MCP, FastAPI and Docker. 100% remote.

Python Developer - Kiosk Displays (Raspberry Pi)

Aug 2026 - Present • 2 mos

For a startup that places advertising displays in barbershops: set up Raspberry Pi kiosks with two screens that start automatically after every reboot (Linux, systemd, Chromium kiosk mode). Built a Python tool that reads each display's settings from a Notion database via the API, generates Cloud-Init configs and flashes several SD cards in parallel, then writes the status back to Notion.

GitHub

Open-Source Contributor

GitHub • Freelance

Mar 2026 - Present • 7 mos

I built four features that are now part of PydanticAI, an open-source AI framework with over 20 million monthly downloads: support for MCP background tasks, prompt caching for Anthropic and AWS Bedrock, Model Armor for Google Cloud and eager input streaming via OpenRouter. Each change came with tests, CI and review by the maintainers.