Stephen Ijatomi

Senior Mobile Applications Developer with 5+ years specializing in Mobile Application Development, with a consistent track record of shipping production-grade cross-platform apps end-to-end architecture, Firebase backends, third-party API and payment integrations, and App Store/Play Store submissions. Comfortable owning multiple apps simultaneously as a solo or small-team developer, from cooperative fintech platforms to consumer app suites. A strong background in native Android/iOS, React Native, and Flutter development underpins a deep, cross-platform approach to mobile development and architecture.

Senior Mobile Applications Developer at XITA Limited (2025-03 – Present)

• Led end-to-end design, development, and deployment of Android/iOS applications, leveraging technologies such as Java, Kotlin, React native, and Jetpack Compose.
• Collaborated cross-functionally with backend teams, UI/UX designers, and product managers to align app functionality with business objectives.
• Enhanced application performance by implementing efficient algorithms and optimising load times.
• Managed complete app lifecycle, including design, implementation, testing, and maintenance.
• Real-time data synchronisation using Firebase for authentication, Firestore and messaging.

Software and Mobile App Maintenance Consultant at Chadvent MPCS Ltd (2021-06 – Present)

• Built and maintained a React Native/Expo fintech cooperative app for a Nigerian cooperative society, including FCM push notifications end-to-end (token registration through Cloud Function delivery), a custom toast/notification system, and single-device session enforcement via Firestore + SecureStore.
• Implemented AES-256-CBC encryption for sensitive KYC fields (BVN, NIN) with bcrypt PIN hashing, plus inactivity-based session locking.
• Built the Paystack payment layer: transfer-to-bank flows with operator-level OTP, webhook verification, wallet refund logic, and double-entry bookkeeping in kobo.
• Built a companion Next.js admin dashboard (React Query, TanStack Table, shadcn/ui) for managing users, loans, and transactions against Firestore.
• Deliver ongoing technical support and security/feature upgrades, minimizing downtime.

Mobile Applications Developer at Data-Driven Logistics Ltd (2024-02 – 2025-02)

• Integrated Google Maps APIs for route optimisation, reducing delivery times and improving fuel efficiency.
• Redesigned and modernised existing user interfaces, enhancing overall user experience.
• Conducted end-to-end testing and debugging with QA teams to ensure app quality and reliability.

Lead Mobile Applications Developer at Tratrust Limited (2021-01 – 2021-06)

• Spearheaded the development of Renmiss, a community engagement application, from concept to deployment across Android and iOS platforms using Flutter.
• Designed and implemented secure payment gateway integration via Firebase Cloud functions, enabling seamless in-app transactions and improving user trust.
• Implemented real-time push notifications and messaging features to drive user engagement.
• Provided ongoing maintenance and feature enhancements post-launch, incorporating user feedback and analytics data for continuous improvement.

Android Application Developer at XITA Limited (2018-06 – 2020-12)

• Designed and developed native Android applications (Java, Kotlin) focused on performance, usability, and scalability.
• Deployed and maintained apps on the Google Play Store, including updates and bug fixes.
• Monitored app analytics and crash reporting via Firebase to optimize stability.
• Implemented RESTful API integrations connecting frontend and backend systems.

MSc in Computer Science (Software Engineering) – University of Staffordshire (2022-09 – 2023-11)

BSc in Computer Science – University of Bath (2013-09 – 2017-10)