Built and deployed a secure banking mobile application from the ground up in a record time of twelve months.

01 //The problem

The bank wanted a brand-new mobile app for everyday retail customers: a digital-only offer in the style of a neobank, not an update of an existing app. The contract fixed the timeline at twelve months from kickoff to store release.

02 //The approach

The project involved about 75 people, 25 of them developers, working alongside business and marketing teams. I worked as a mobile developer on the React Native codebase, which ships the iOS and Android apps from a single build. Like any banking app, it had to meet the sector's security and compliance requirements, and every feature was built to that standard.

The hardest constraint was keeping technical quality high under a fixed deadline. The app had to stay fast and fully usable on older Android phones, not only on recent models. So I worked on rendering performance, on the animations, and on the cost of the security libraries a banking app has to run. A bank serves everyone who holds an account, so low-end devices are part of the audience.

The app had to stay fast and fully usable on older Android phones, not only on recent models.

03 //The outcome

The app shipped to the App Store and Google Play on the twelve-month schedule, and the launch went well. iOS and Android were released from the same React Native codebase, and the digital-only offer the bank set out to build is now live for its retail customers.