Tomasz Białobrzeg Cyber IT
Portrait of Tomasz Białobrzeg

Tomasz Białobrzeg

AI Product Engineer · Architect · Product Lead

LinkedInWrocław, Poland

About me

I get things done, including complex work across the whole product life cycle. Give me an unclear customer or business need and I take it on my own through discovery, architecture and implementation to a verified production release, and on to operations and root-cause analysis of production incidents — in whatever technology the problem needs, hands-on by myself or with a team where I act as senior engineer, architect and product lead.

My main focus is AI systems architecture: applications integrated with language models and AI workflows that stay reliable outside demonstrations. I ground models in reliable data, evaluate output quality against real source material, and design systems that detect, explain and correct their own failures over time.

Some apps I built

macOS · iOS · Android · WebPL

VirtualTutor

AI English-speaking tutor for macOS: twelve tutor characters that reply in character, adapt to the learner’s level and give one focused correction per clear mistake.

macOS · iOS · Android · WebPL

GoldWatcher

Gold market app with inflation-adjusted prices and a trend-following algorithm, backed by statistical research on how fast a trend change can be recognized.

API · WebPL

MarketLab

Public data API on Cloudflare Workers with curated, source-documented market series (gold, CPI, exchange rates) used by GoldWatcher.

MCP · Open WebUI· Beta

KIO Legal Research Assistant

RAG assistant over 5,802 Polish public-procurement rulings (KIO), with about 15,000 verified summaries, one per allegation.

Experience

2012–present

Tomasz Białobrzeg Cyber IT

Sole proprietorship · own products

My own business, run alongside employment: products I build end to end, from idea to release, with my own agent harness based on feedback loops — AI agents plan, implement and independently verify each other’s work.

  • VirtualTutor

    2026

    Spoken-English tutor with twelve AI characters; every prompt change is evaluated on real conversation logs against the current baseline before release.

  • KIO Legal Research Assistant

    2026

    LangGraph pipeline that turned 5,802 KIO rulings into about 15,000 verified summaries for a legal research chat on Open WebUI; in beta.

  • GoldWatcher · MarketLab

    2026

    Gold market app backed by statistical research on how fast a trend change can be recognized, with MarketLab, a public data API on Cloudflare Workers.

  • MedZalia.com · ExcitedFood.com

    2022–2023

    Symptom assistant on the OpenAI API and recipe recommendations, built alone in Angular and Firebase.

LLM · RAG · LangGraph · Python · TypeScript · Flutter · Cloudflare Workers · Claude Code

2023–2026

Visa Commercial Solutions

Technical Lead / Senior Software Engineer

B2B virtual card payments in the Payables ecosystem: enterprise platforms in Java, Angular and microfrontends. Technical lead of a team of 6–10 engineers.

  • Built an AI tool that reads production logs together with the source code that emitted them, reconstructs the execution path and finds the root cause; other teams adopted it as a Claude Code and Roo Code skill with an MCP server.
  • Go-to person for fast root-cause analysis, regularly taking other teams’ production incidents.
  • Designed and built two microservices for payment creation and on-demand virtual cards, integrated with VisaNet.
  • Migrated applications to Java 17 and Angular 18; CI/CD with SonarQube and Checkmarx; deployments on Docker and Kubernetes.

Java · Angular · Microfrontends · Kubernetes · CI/CD · MCP · Claude Code

2009–2022

mFirma.eu

Co-Founder, Product Lead & Senior Software Engineer

Website builder and Google Ads campaign service designed for customers aged 40 and above: tens of thousands of paying customers — small businesses, local governments, schools, parishes; about 10% from abroad. Team of 6–12.

  • Product discovery directly with customers, turned into the website editor and the campaign ordering system.
  • Designed the editor’s modular architecture and wrote more than half of its code; the editor is still in use at pl.mfirma.eu.

Java · AngularJS · JBoss Seam · Bootstrap

2008–2011

Nasza Klasa (nk.pl)

Project Manager → CTO

Technology at nk.pl, then one of the largest social networks in Poland. My main responsibility was the software development process.

  • Introduced and enforced the core software development and deployment process, with selected CMMI level 2–3 practices.
  • Grew the development team from 9 to 29 specialists.
  • Additional projects: migrated the data center from Poznań to Warsaw (1,200 servers), launched the mobile version of nk.pl and an API for game developers.
2003–2008

Siemens

Developer → Architect → Project Manager

Embedded C/C++ and Linux for Siemens communication devices, with teams in Poland, Germany, Belgium and Brazil.

  • Project Manager: 15 engineers building router software for T-Com Denmark and T-Com Croatia.
  • Section Manager: 25 engineers on digital TV decoder software; recruited and onboarded 15 developers.
  • Software Architect: redesigned Gigaset cordless phone components; designed the Compact Picture Format for embedded devices.

C · C++ · Embedded Linux · C#