Mobile banking app development

This thesis presents the design, development, and evaluation of a cross-platform banking branch management application aimed at improving the efficiency, accuracy, and usability of internal banking operations. While modern banks heavily invest in customer-facing digital services, internal administrative systems often remain fragmented, outdated, and difficult to maintain. This study addresses that gap by proposing a unified mobile and web-based solution for managing branch-level data. The proposed system is implemented using Ionic React for the frontend, FastAPI as a backend application layer, and Supabase as a Backend-as-a-Service (BaaS) platform providing database and authentication services. OpenStreetMap and the Nominatim API are integrated to support address search and geolocation, reducing manual data entry and improving data accuracy. The application is deployed both as a web application and as an Android mobile application through Capacitor, enabling code reuse across platforms. A design science research methodology is adopted, encompassing requirements analysis, system design, implementation, and evaluation. Usability testing was conducted with 18 participants representing diverse technical backgrounds. The evaluation employed task-based analysis, qualitative feedback, and the System Usability Scale (SUS). The results indicate high task completion rates and an average SUS score of 82.4, reflecting excellent perceived usability and user satisfaction. The findings demonstrate that modern hybrid application frameworks, combined with cloud based backend services and open geolocation platforms, can effectively support internal banking processes. The thesis contributes a reference architecture and empirical usability evidence for future research and practical implementations in administrative and enterprise focused financial applications.