Michał – React, Typescript, JavaScript

Telecommunication services company that operates mobile and internet services. I was working on application for settlements between operators.

• Improved frontend code base;
• Developed multiple end-to-end functionalities;
• Redesigned existing component library.

A platform for donors, students, and colleges to manage scholarships in the USA.

• Refactored code to use reusable components;
• Planned and developed new features - from business logic to fullstack implementation;
• Added combined SSR data fetching with client pagination and revalidation;
• Wrote integration and e2e tests;
• Refactored pages to be responsive.

One of the largest survey applications in the UK, used mainly by British colleges with over 300 different organizations.

• Implemented parameters and pre-population functionality for surveys;
• Implemented adding bulk users;
• Implemented downloading responses and users in CSV format;
• Implemented the ability to change languages;
• Refactored the existing front end;
• Debugged and resolved the application issues;
• Wrote unit and e2e tests.

One of Sweden's largest fuel companies. The project was for both private and business clients. It was an e-commerce platform to rent cars, pay for fuel, and car wash.

• Implemented UI components to be served by the backend page builder;
• Debugged and resolved the application issues;
• Wrote unit tests.

Telecommunication services company that operates mobile and internet services. I was working on two projects: the Dunning application and an invoice correction application. The Dunning application was used by company workers to manage users' accounts in both manual and automatic ways. The invoice correction app was also used by company workers to create invoice corrections.

• Created front-end architecture for several projects;
• Built frontend component library - advanced table, which was integrated with the backend, allowed users to display, filter, order, paginate, modify, and reorder data;
• Debugged and resolved the application issues;
• Wrote unit and integration tests;
• Integrated with different providers.

Working as a freelancer for multiple companies, mainly as a consultant.

• Redesigned the existing architecture;
• Suggested optimizations for clients;
• Was responsible for the code reviews;
• Conducted the developer's training;