Grzegorz is a Senior Software Developer with a strong focus on React Native and React.js - providing subject matter expertise for web and mobile-responsive designs on projects. He builds scalable solutions and implements pixel-perfect designs that balance challenging customer needs with application performance. He seeks to deliver clean, modern, smooth animations and features that provide excellent UI/UX - following the latest web standards and best practices.
Migrated the old Economist app platform to a new, more efficient React Native platform - implementing better features and functionalities. Improved the article playback and audio download features on the app, fixed functionality issues and edge cases on the project. Optimized the app to handle more than 10M users.
Built a new car diagnostics mobile app that integrates with the OBD device connected to the users' vehicle. Implemented features to notify users about potential vehicle issues, history of recent journeys and a breakdown of driving habits. Worked on a Node.js backend that handles push notifications and the Azure infrastructure.
Developed new solutions on a largescale project for British Gas - migrating several native mobile apps to a performant React Native solution - improving speed and quality. The solutions serve 1.5M customers on both Android and iOS devices.