Worked on the Wspolny-Dojazd/frontend-mobile repository, focusing on improving the accuracy of transit map pin placement for mobile users. Addressed a bug where destination coordinates were undefined by deriving the pin location from the last stop of the accepted path, ensuring more reliable map visuals. Applied strong debugging skills and made targeted, low-risk code changes using React Native and TypeScript, with careful attention to traceability through precise commit messaging. The work enhanced the frontend experience by reducing the risk of map pin misplacement, demonstrating a methodical approach to problem-solving in JavaScript and TypeScript within a production mobile codebase.