RAG assistants
A chatbot that answers only from your data and cites the source. Just like Robin - it does not make things up.
jonas@pilsen:~/build$ ./build_ai_app.sh
I will build you
an AI app made to fit.
RAG assistants over your documents, agents, internal tools, or AI features inside an existing product. From idea to a running product, not to a slide deck. I build it myself, so I know what is realistic.
# a typical flow I build
load(documents) # PDF · DOCX · XLSX · web
embed("multilingual") → vector_db
retrieve(query) → rerank() → context
answer(context, model="claude", cite=True)
✓ an answer in seconds - with its source, no hallucinations
load(documents) # PDF · DOCX · XLSX · web
embed("multilingual") → vector_db
retrieve(query) → rerank() → context
answer(context, model="claude", cite=True)
✓ an answer in seconds - with its source, no hallucinations
What I can build
The four things I do most often.
AI agents
Automations that act on their own - briefings, content, replies, hooked into your tools.
Internal tools
Dashboards and apps built around your process, not around a template. For where a spreadsheet stops being enough.
AI inside your product
I add a sensible AI feature to the app you already have - search, summarising, classification.
How it goes
From idea to a running product.
A conversation
What you are dealing with and what the app actually has to do. No filler.
Prototype
A quick working core you can actually poke at, not a mockup.
Tuning
We iterate on your real data until it fits.
Deployment
I put it into production and hand it over.
Stack
What I build it with.
PythonTypeScriptFastAPINext.js
ClaudeGPTRAGvector DBs
n8nDockerSSE / streaming
Proof, not promises
What is already running.
Robin
An internal AI assistant for companies. RAG over company documents, roles, source citations. Built entirely from scratch.
ViralScope
Breaking down viral Reels with Gemini plus concept generation with Claude. Next.js, SSE pipeline.
Pricing
Fair, from the first sentence.
ballpark
from 19,900 CZK
~€800 · depending on the scope of the project · running costs (API, hosting) handled separately
✓ You do not pay until you are happy
Send me the brief and I will come back with a no-obligation estimate within 24 hours.