As an engineer on the Messages Services and Security team, your responsibilities will include: • Designing end-to-end protocols for innovative new Messages features • Developing maintainable Swift frameworks, such as BlastDoor, to significantly improve service reliability and security • Building infrastructure for safe data handling to prevent against zero-click attacks that don’t require user interaction • Creating testable code to rigorously test changes and ensure consistent quality over time • Collaborate with cross functional teams to build exciting new user experiences • Work on the protocols that build iMessage, Messages via Satellite, Emergency SOS via Satellite, Messages for Business, SMS Relay, and RCS