Senior iOS Engineer

Mollie is looking for a Senior iOS Engineer to build and maintain their payment SDK for iOS. The successful candidate will design, develop, and distribute a production-ready iOS SDK, ensuring compatibility across iOS versions and device types, and collaborate with platform and app teams to align on shared tooling and mobile infrastructure.

Requirements

• Strong iOS development experience with Swift and modern frameworks (UIKit, SwiftUI)
• Minimum of 4 years experience with developing mobile apps
• Experience building and distributing SDKs or libraries consumed by other developers
• Deep understanding of iOS SDK distribution
• Experience setting up CI/CD pipelines for automated testing, versioning, distribution, and App Store submission
• Excellent communication skills
• Understanding of API design principles and developer experience considerations
• Create comprehensive documentation