Olabisi Ajoseh

Designed and implemented scale-up loan, loan management, and loan history solutions across frontend and backend systems, enabling end-to-end loan workflows including tracking, repayment, and lifecycle management. Owned instant transfer and scheduled transfer functionalities, along with advanced transaction analytics with frontend and backend support to filter transactions by beneficiary and other key criteria. Redesign and enhanced the receipt generation system across transfers, bill payments, airtime/data purchases, electricity payments, debit/credit transactions to improve transaction visibility and user experience. Contributed major codebase improvements through architecture enhancements, performance optimization, and scalable feature implementation to improve maintainability and overall system reliability. Published and maintained production mobile applications on both Apple App Store and Google Play Store. Participated in architecture discussions, sprint planning, estimation, and

Built a complete development lifecycle from planning and architecture to deployment. Implemented Redux Toolkit Query (RTK Query) for API integration, including slice creation, injected endpoints, and shared data layers to streamline state management and improve data consistency across the app. Improved overall application performance by refining RTK Query caching, managing API request lifecycles, and optimizing component re-renders on key screens. Delivered production-ready cross-platform React Native features from planning through deployment. Integrated Expo Router / latest Expo navigation features to improve navigation flow, screen structure, and user experience across iOS and Android.

Built and maintained cross-platform mobile features with React Native and TypeScript using reusable, modular components. Integrated GraphQL APIs with frontend clients, leveraging Apollo Client and Redux Toolkit for efficient state management. Developed backend services with NestJS and TypeScript, including GraphQL resolvers, authentication, and core business logic. Optimized component architecture, React Hooks usage, and API interactions to improve app responsiveness, scalability, and performance.