Developed end-to-end features for landlord fleet management and rental workflows in the Ssantivl12/RediBo_Front and RediBo_Back repositories, focusing on operational efficiency and payment reconciliation. Delivered a vehicle management UI for landlords, enhanced rental request filtering, and implemented a payment gateway supporting card and QR payments with downloadable receipts. On the backend, restructured routes and added support for vehicles, reservations, and comments to align with CodeLovers architecture. Utilized JavaScript, TypeScript, and React for frontend development, while leveraging Node.js and Express.js for backend services. Prioritized maintainability and UI consistency through targeted refactoring, global style updates, and code cleanup.