Poznań, Poland
Building enterprise systems and AI-powered B2B products. Expert in Java, DDD, and turning code into revenue.
Get in touchProduction-grade B2B SaaS solutions with paying customers
2025
AI-powered lead detection for the construction industry. Collects building permits (GUNB) and public works tenders (BZP, EU TED) every 15 minutes, scores each investment with an LLM pipeline, and alerts companies by email and SMS about work within their radius. 41,500+ investments indexed.
2023
B2B SaaS for construction logistics. Replaces notebooks and spreadsheets with a dispatch calendar for machines and operators, conflict checks, service reminders, and automatic SMS and email notifications to operators and clients. 2,700+ construction machine jobs processed.
July 18, 2025
How I turned a stagnant product into my first revenue-generating SaaS by refining the offer, talking to real users, and running targeted ads.
June 15, 2025
Built in 3 hours: an AI tool that searches Reddit for user pain points, scores them by business potential, and emails me a daily report. A simple but powerful way to spot ideas worth building.
December 11, 2024
A personal update on recent business moves, reflections on the fast-moving world of AI, and key takeaways from the Pozitive Technologies 2024 conference-including some surprising facts you might not expect.
October 3, 2024
Implementation of registration and login system with a welcome screen. Game state persistence in MongoDB. Introduction of monsters with basic AI, item corpses, and tile-blocking obstacles like trees and rocks.
August 1, 2024
First version of melee combat between players. Exception-based support for multiple players on one tile. New UI layout with left and right panels. Backend model restructuring and streamlined state management.
July 25, 2024
Fluid walking and rotation, real-time updates for nearby players, dynamic map chunk loading and cleanup, plus key backend threading and serialization improvements.
Open-source experiments for exploring new architectures and ideas
2025
Online browser game exploring real-time multiplayer architecture. Battle others, collect crystals, expand your base. What I learned: real-time multiplayer state sync, WebSocket performance under load.
mkmiecikitdev/lumina-clash
2025
Open-source framework for building browser MMORPGs - Spring WebFlux backend, React + Phaser client. What I learned: clean/hexagonal architecture in practice, custom binary protocol design, Spring WebFlux + Netty.
mkmiecikitdev/browser-mmorpg-starter