Marshmallow is an innovative fintech company focused on building financial products for people who move across borders, with their primary product being car insurance serving over a million drivers. They're seeking a Senior iOS Developer to join their Mobile Team, whose mission is to build the best app in the business. The role involves working in a cross-functional environment, using modern technologies like SwiftUI, and contributing to a modular architecture. The position offers a blend of technical leadership and hands-on development, with opportunities to shape the technical direction and mentor team members. The company provides a flexible hybrid working environment with 3 days in their London office, comprehensive benefits including healthcare and mental wellbeing support, and strong emphasis on personal growth and development. Their engineering culture promotes autonomy, experimentation, and collaborative problem-solving, organized into tribes focusing on Acquisition, Retention & Claims. The ideal candidate will have 5+ years of iOS development experience and a strong background in Swift, particularly SwiftUI.