● Lead the development of mobile banking platforms and merchant ecosystem applications serving retail and business customers. ● Successfully developed, deployed, and maintained two end-to-end mobile banking applications for the third largest bank in Tanzania, supporting both retail customers and merchant businesses. ● Designed and implemented secure authentication systems, including OTP verification, biometric authentication, and device-based security validation. ● Developed and integrated financial transaction modules, including bank transfers, mobile network transfers, digital wallets, and bill payments. ● Built the TANQR Merchant Payment System, enabling merchants to accept digital payments through QR codes and merchant till numbers. ● Architected scalable APIs and backend services supporting merchant and retail banking applications. ● Implemented advanced security features, including SSL pinning, encrypted transactions, and secure payment validation mechanisms. ● Optimized application performance using asynchronous processing, Flutter isolates, and UI performance improvements. ● Led code reviews, bug resolution, and release management across staging and production environments. Key project: NBC KIGANJANI Digital Banking Platform. ● Developed a complete mobile banking application for retail financial services. ● Supported system training and onboarding before release. ● Achieved 97% successful migration of legacy customers to the new digital platform. ● Managed deployment and release cycles across App Store and Google Play Store. ● Monitored and optimized application performance for large user traffic.

● Developed and maintained healthcare data management systems using React, TypeScript, Flutter, and DHIS2 APIs. ● Designed and implemented mobile and web applications integrated with DHIS2 platforms and SQLite databases to support national health data reporting. ● Built reusable UI components and modular front-end architectures to improve development efficiency across applications. ● Improved system performance through architecture enhancements, optimized database queries, and efficient data synchronization strategies. ● Developed Node.js automation scripts for data migration, transformation, and messaging workflows. ● Conducted testing, debugging, and performance analysis to ensure application reliability and stability. ● Participated in Agile development cycles, including sprint planning, version control with Git, and collaborative development workflows.