More than 20 years building products that work in the real world.

Took over development of an existing Flutter mobile app for Extreme Way of the Cross (EDK) participants. Migrated the map engine from flutter_map to MapLibre GL for native rendering performance. Implemented GPS tracking with 3-state compass navigation, offline map downloads, GeoJSON-based event/station clustering, and interactive elevation charts. Fixed critical production crashes (MapLibre SIGSEGV, Firebase Remote Config failures, theme crashes on Android). Optimized rendering from 3 FPS to smooth performance on budget Android devices. Added dark mode, meditation language switching, and safe area handling across diverse devices.

Warehouse management system for Extreme Way of the Cross (EDK) package distribution. Handles inventory tracking, leader orders with commission-based settlements, public donation pages with Przelewy24 payments, automated shipping via Apaczka.pl and InPost, warehouse staff panel, district-level package allocation, and Synerise CRM integration. Built with role-based access for coordinators, district leaders, and warehouse staff.

Online store for Extreme Way of the Cross (EDK) built on PrestaShop. Implemented integrations with Apaczka.pl for shipping and InPost parcel locker selection. Orders are automatically synced from PrestaShop to Subiekt GT via Sybsync, triggering automatic invoice generation. Secure payment processing is handled via Przelewy24.

Web-based training hall booking system for fitness studios. Platform enables external trainers to easily reserve time slots with capacity control. Features intelligent reservation validation system, automated monthly billing, and advanced calendar with real-time visual capacity indicators. Perfect for fitness studios and training facilities.

Mobile application for food recognition and diet management. Built using React Native and Expo, with TensorFlow.js for AI-powered food detection, Firebase for authentication, and comprehensive diet tracking capabilities.

Donation platform for Extreme Way of the Cross (EDK) with custom integration with Polish payment gateway Przelewy24. Built using modern web technologies, with a focus on user experience and secure payment processing.

Web platform for Extreme Way of the Cross participants providing route management and tracking capabilities. Developed frontend architecture using modern web technologies.

Online multi-agency insurance product platform. Leading the Ruby Competence Center as IT Director/CTO, conducting security audits, and managing development teams.

Accounting automation platform for entrepreneurs. Led implementation of Open Banking (PSD2) integration and managed the Ruby development team.

Founded and developed an email discovery platform for lead generation. Built a simple yet powerful tool for finding and verifying email addresses by domain name, with an integrated email verification system.

Leading feed marketing solution processing millions of data points daily. Built and scaled the platform from the ground up, growing the technical team from 3 to 26 people.

Founded and developed an online translation platform connecting clients with professional translators. Created a streamlined system for ordering, managing, and delivering translations with an automated workflow.

One of Poland's largest web portals. Led development of main sections including News, Jobs, and INTERIA.TV.

Architect and developer for the RMFOn.pl platform. Responsible for setting up the development environment, technology consulting, and implementing key features including the admin panel.

Leading Polish web portal. Developed and maintained multiple topic sites including the new homepage, Skype integration, and various vertical portals.