Main need is Kotlin/RxJava, everything below would be a massive plus.

Native Android mobile application development
Experience developing banking grade mobile solutions
Experience with developing with bank grade security requirement, PCI DSS compliant mobile security solutions, encryption, certificate pinning, OIDC/OAuth2, session management
Designing and implementing Mobile App interacting with REST API and GraphQL
Developing solutions with native Android UI as well as embedded Webview
Developing and shipping mobile applications maintained by multiple external and internal teams and contributors
Developing to engineering metrics and standards (automated testing, code quality etc.)
Experience developing Card Payment and Management experiences is a plus