MSc Eng. Artificial Intelligence and Data Science
Częstochowa University of Technology
I build AI agents that work for your team.
AI agents, RAG and automations that cut manual work in companies. From prototype to production.
Open to new projects: business deployments and contract work.
- 2+
- years of experience
- 5x
- faster work through automation
- 10x
- sales channel revenue growth
AI for existing systems
Over two years I built a trading company’s systems from scratch: an ERP/WMS, a B2B platform searching 60M+ offers and two online stores.
Since May 2026 I work as a freelance AI Engineer, deploying AI agents and RAG systems, like an agent that replies for a wholesaler by email and on WhatsApp while a person only approves sending.
Case studies
Stacja 2.0, an ERP/WMS with AI agents
Stacja combines ERP/WMS, inventory, sales, a mobile application and AI agents in one system.
- 60%+
- shorter order fulfilment
- 10x
- sales channel revenue growth
- 5x
- faster product cataloguing
B2B search and a RAG pipeline
More than 60M listings, responses around 100 ms and repair estimates turned into a verified cart.
- Nuxt
- Python
- FastAPI
- Elasticsearch
Flipper, a deal scanner for iPhones
AI grades the phone's condition from photos and filters out scams, and a new deal reaches the dashboard within 3 minutes. About 2,500 PLN profit in week one.
- Nuxt
- Tailwind
- Supabase
- Python
More projects
github.com/hkn-33- Shipped 2026Customer service agentReplies for a toy wholesaler by email and on WhatsApp, checking stock and deliveries. An employee only approves sending.FastAPI · pgvector · MCPAI
- Private 2026Customer service agent platformA ready tool: pick channels (email, WhatsApp, site chat), upload files, and agents build and test the RAG themselves. One panel shows every conversation, human handoffs and costs.Agenci AI · RAG · LLM-as-judgeSaaS
- Private 2026Flipper, AI for flipping iPhonesScans OLX, Vinted and Facebook Marketplace live. AI checks descriptions and photos (defects, battery), values the device and suggests buy and sell prices. Flags deals with a sure profit.Scraping · Vision LLMAI
- Private 2026Claims law firm websiteBuilt for a client, not public yet. A 3-step claim form, client panel, case status and a blog.Nuxt · Tailwind · Server APIWeb
- Private 2026Get That NumberMy SaaS for SMS verification numbers. Ordering a number works like a chat, with a production-ready backend.Nuxt · Tailwind · Server APISaaS
- Open source 2026GPW Research WorkshopA set of AI agent skills for analysing Warsaw-listed companies with the methods of four great investors.Claude Code skills · PythonAI
- Open source 2024Unlimited Translate APIA translation API with automatic language detection.Python · FastAPIAPI
Technologies
AI and LLMs
- OpenAI
- Claude
- Claude Code
- DeepSeek
- LangGraph
- LangChain
- MCP
RAG and search
- Elasticsearch
- Qdrant
- PostgreSQL
- Redis
Backend and deployment
- Python
- FastAPI
- Pydantic
- Docker
- GitHub Actions
Frontend and apps
- Nuxt
- Vue
- TypeScript
- Tailwind
- Capacitor
Experience
AI Engineer - Freelance
Self-employed
Email & WhatsApp agent
An AI agent replies for a toy wholesaler by email and on WhatsApp, checking stock and deliveries. An employee approves before sending.
RAG & MCP
Agents connected to client data and tools, with pgvector search and answer quality checks.
AI Engineer & Full-Stack Developer
Bracia Wydmuch
2 weeks
An ERP/WMS MVP that unblocked sales on Allegro.
60M+ / ~100 ms
B2B search and an OCR + LLM module that turns repair estimates into a cart.
5x
Faster part cataloging with an AI agent.
60%+
Shorter order fulfillment with a packing assistant.
Full-Stack Developer
Bracia Wydmuch
10x
Ovoko channel revenue after the marketplace integration.
10 suppliers
A wholesale search app and automated supplier orders.
Education
BEng Computer Science
Częstochowa University of Technology
Got a process that eats your time? Write to me.
Describe in two sentences what you do by hand. I will reply with what can be automated and where to start.
JJanik2k@gmail.comHow we start
- 01CallYou show me the process that takes the most time.
- 02PilotI automate one process on your data.
- 03RolloutIt works? I connect it to your systems and we keep going.