Just AI Programmer

~ Don Quixote fighting entropy

Curriculum Vitae

Introduction

I have over 20 years of experience building commercial software. I am passionate about the craft — a day without learning something new is a day wasted. Since teaching others is the best way to learn, I eagerly share my knowledge. Delivering results matters to me just as much as the craftsmanship of the execution.

About Me

Me Father², husband, bookworm, programmer, conference addict. Don Quixote fighting entropy. Delights in contradictions and humor. Believes in chance. Beer philosopher. Occasionally goalkeeper.

Contact

Programming Interests

My interests in recent years have focused on several themes: Functional Programming, Event Sourcing & CQRS, Domain-Driven Design, Software Craftsmanship, and Software Architecture.

Education

badges

Talks

I have been giving talks at work for several years, but only recently took on the challenge of public speaking:

Talk @GrupaLodz Earlier talks and internal trainings covered topics including: design patterns, Clean Code, Git (blog post), refactoring legacy code (blog post), JavaScript (slides), jQuery and jQuery UI (slides).

Experience

Allegro Pay (Feb 2020 – Present)

Principal Software Engineer (Nov 2022 – Present)

Senior Software Engineer (Feb 2020 – Oct 2022)

FinAi (Apr 2017 – Jan 2020)

Senior .NET Developer

  • Rules Engine — designed and implemented a configurable rules engine for credit scoring and decisioning, enabling business analysts to define lending criteria without developer intervention
  • Workflow State Machines — built workflow orchestration using state machines to manage complex multi-step loan processing pipelines
  • Biometry Verification — integrated biometric identity verification into the lending platform for KYC compliance
  • Back Office — developed internal back-office tools for loan portfolio management and operational monitoring
  • Bank Statement Analysis — created automated bank statement parsing and analysis module to streamline income verification

mBank (2015–2017)

IT Expert, Application Portfolio Development & Maintenance Department C

  • FxPos — foreign currency position and pricing engine: designed and implemented a real-time system for calculating and managing FX positions and pricing across the bank's trading and retail operations

PIĄTKA SPÓŁKA JAWNA (2003–2015)

A small company (15–20 developers, many of them MIM UW graduates) with 1 major client (PGNiG and subsidiary companies). Main product: a billing system serving 3.5 million gas consumers.

Tech Lead — Pincasso.NET Project (2011–2015)

The Pincasso.NET billing system gradually replaced the company's previous product and was designed to serve 3.5 million gas consumers.

  • Team of 6 developers (+2 remote), plus a dedicated QA team
  • Technologies: C#, ASP.NET MVC 4, JavaScript, Oracle...
  • Automated testing:
    • 3K+ unit tests
    • 99% business layer coverage
    • Integration and UI tests
    • TDD
  • Continuous integration (TeamCity, WebDeploy)
  • Weekly retrospectives
  • Mutual code reviews
  • Weekly short demos of new features or system changes
  • New releases in 2-week cycles
  • Regular training sessions led by team members (e.g., chapters from "Clean Code")

Lead Developer — Sprzefak++ Project (2003–2015)

Invoice and cash register management system.

  • Principal author
  • Team of 1–3 developers
  • 100K lines of C++ code
  • Technologies: C++, MFC, PervasiveSQL, Oracle, Boost, NSIS, XML, XSLT, fiscal printers, and many more
  • System in production for 11 years

Selected Other Work (2003–2011)

  • Internal frameworks:
    • UI controls for ASP.NET WebForms / MVC, JavaScript, MFC
    • Micro ORM (dictated by the need to support an "exotic" database)
    • Documentation tools and processes (Doxygen)
  • Technical architecture and UI for the CBO system (ASP.NET WebForms, Oracle)
  • Integration projects including SAP integration using WebSphere ESB
  • User training and product demos
  • Linux and Windows server administration:
    • Backups
    • SVN / Git
    • CC.NET and TeamCity
    • Issue trackers: Trac, Mantis, Bugzilla
    • Mail and FTP

Co-Founder — Konsorcjum Progres (2010–2014)

Specialized Diagnostic Platform

A platform for building tests, constructing diagnostic tools, and conducting research and result analysis (including tests for drivers).

  • 4 developers
  • Collaboration with the Military Institute of Aviation Medicine
  • Technologies: C#, ASP.NET WebForms, Adobe AIR, SQLite

Consultant — Empolis Polska (2002–2003)

  • Participated in knowledge management projects
  • Developed applications on the J2EE platform in a Sun Solaris environment
  • Conducted trainings

Consultant — McKinsey & Company (2001)

  • Restructuring project for Telekomunikacja Polska SA

Other Independent Projects (selected)

  • mCRM — a mini CRM (2 deployments, ASP.NET WebForms)
  • Application for collecting and analyzing results of HIV therapy research for the Medical Academy (MS Access)
  • Application for cataloging and analyzing samples of thermally treated materials for the Institute of Precision Mechanics
  • Online store dobraoferta.com (PHP/JavaScript)
  • Server administration for TOMS (Windows NT, Linux, Novell, Samba)