Principal iOS Developer - Berlin / Remote

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Requirements:

• 8+ years of professional iOS development experience, with deep proficiency in Swift and SwiftUI
• Demonstrated experience implementing and optimizing solutions that leverage complex networking (HTTP/S, DNS, VPN/WireGuard) and security measures (encryption, secure communication, and data handling)
• Knowledge and experience shaping requirements and interfaces with backend service teams
• Strong familiarity with Network Extensions, Web Extensions, URLSession, and Core Data, as well as advanced performance optimization
• Commitment to maintaining a high bar for code quality with unit tests (XCTest) and adherence to Apple’s Human Interface Guidelines and security standards
• Excellent ability to translate technical concepts across teams, provide mentorship, and maintain collaborative and effective working relationships
• Passionate about app performance, logging, analytics, monitoring and system health
• Able to work directly with product and UX to prototype, test and develop concepts

Responsibilities:

• Design and implement high-quality iOS features using Swift, SwiftUI, Combine, and modern architectures
• Build sophisticated solutions that integrate with network protocols (HTTP/S, DNS, VPN/WireGuard) and Web Extensions to deliver robust content filtering and privacy enhancements
• Continuously improve app performance, scalability, and stability through proactive optimization and rigorous testing
• Collaborate with other engineers, Product Managers, UI/UX Designers, and cross-functional leaders to drive strategic alignment on product goals, ensuring cohesive user experiences across multiple teams and products
• Guide senior developers in advancing their technical expertise and drive high-impact code review processes
• Lead the adoption of evolving Apple frameworks, guidelines, and industry best practices to drive innovation and ensure compliance across the organization