Grzegorz
Rails programmer open to different technologies. Expert in unsolvable challenges. Passionate gamer, game creator and regular participant of Global Game Jam. Constantly developing skills related to image analysis and neural networks.
Skills
Backend &Frondend Development Application Architecture API Design Refactoring VisualizationProjects
GOBL
Global JSON Invoicing Standard
An open standard initiative for interoperable JSON invoicing across regulatory ecosystems.
Major contributions
- JSON to KSeF structure converter (Go)
- JSON to XRechnung structure converter (Go)
Website Fractal Soft
software house
Corporate website and content platform for Fractal Soft services, projects, and team pages.
Major contributions
- Updating Rails to version 7.x
- Updating Bootstrap 3 to Bootstrap 5
Amenitiz
hotel management application
A comprehensive property management platform for short-term rental owners and managers. It streamlines reservations, channel distribution, and guest communications.
Major contributions
- Integration with Invopop
- Invoicing configuration for Mexico
- Backend development in Ruby on Rails
Julinek AR
augmented reality circus game
A mobile AR game experience designed for public entertainment environments.
Major contributions
- Development in Unity
Project Koch (NDA)
global e-commerce platform
A large-scale commerce platform with distributed services and customer-facing workflows. Reliability and interoperability were essential to daily operations.
Major contributions
- Development in Sinatra (Ruby)
- Customer Accounts Authentication service
Aplikacja reklamowa
campaign management platform
A campaign operations platform supporting ad workflows and performance management.
Major contributions
- Frontend development in React
Project Julia (NDA)
digital education platform
A global learning platform serving millions of learners and thousands of courses. The system supports multiple partner types and course formats.
Major contributions
- Backend improvements in modular Rails services
Hitdea
based on microservices
A logistics-focused platform with distributed services and custom operational modules.
Major contributions
- Development in Ruby on Rails
- User conversion experiments