Dariusz – Node.js, React, PostgreSQL

Application for managing service locations such as hotels, restaurants, etc. Allows you to onboard employees, store documents, assign tasks, create reports, run courses, and much more.

• Created back-end architecture
• Built front-end components library
• Wrote unit tests
• Made integration and e2e tests
• Integrated with payments providers

An application that integrates all food delivery channels available on the market. Allows you to operate services such as Uber Eats, Volt, Bolt Food, Takeaway, Glovo from a single tablet. In addition, it allows users to manage restaurant menus, product availability, and order statuses. It also has integration with bill printers.

• Created front-end and back-end architecture
• Debugged and resolved the application issues
• Integrated with food delivery channels providers
• Resolved scale problems
• Handled order queue
• Was responsible for designing complex menu architecture
• Handled menu parsers
• Was in charge of maintaining order status, synchronization and more

An application that allows betting on sports events.

• Created front-end architecture
• Redesigned the existing front-end
• Integrated with betting suppliers
• Developed a way to continuously refresh the results
• Made the app compatible with mobile views
• Added all the restrictions required by law (because it's gambling) - such as verifying the age of the player

A platform that improves the analysis of geographic data combined with population data in a selected area, allowing better business operations planning. Allows customers to get information about people's behavior in the selected area.

• Created the front-end of the application from scratch
• Planned the structure of the front-end
• Integrated with the back-end
• Developed a way to provide translations
• Developed a way to display maps with overlaid layers
• Built a library of reusable components
• Was responsible for parsing data into a form that is convenient for the front-end

A large corporation, a direct competitor of Salesforce. They decided to do a big refactoring of the entire system, which was outdated, and move it to React.

• Built front-end components library
• Wrote unit tests
• Made integration and e2e tests
• Built components to allow flexible use
• Adapted components to work with people with disabilities

A platform to improve the functioning of funeral homes.

• Created front-end architecture
• Redesigned the existing front-end
• Debugged and resolved the application issues
• Built front-end components library