Harold Austen-Okoronkwo

Led development and refactor of the Mobile Endpoint Agent (MEPA), merging two major network-testing apps and updating the codebase to modern Android technologies to improve reliability and maintainability.

Led development on TfL Go, shipping Route Service Diagrams and bus service features to 1M+ monthly Android users using an offline-first MVVM architecture.

Built a customer reviews page with a rating graph, added favourites and quick re-ordering, and implemented paginated order history to improve UX and retention.

Developed an online train-stop search reducing app size ~20% and improving load performance ~60%; integrated Google Wallet to enable ticket saving for Android users.

Core developer and mentor on TfL Go from inception to global release; contributed accessibility-first features and custom Android views, helping the app reach 100,000 downloads in its first month.

Re‑vamped the flagship Android app with MVVM and clean architecture, reducing load times up to 80% on low-end devices and delivered an iOS counterpart in Swift.

Completed a Master of Science in Computer Science, focusing on advanced computing topics and software development practices.

Completed the International Baccalaureate program with a broad pre-university curriculum.