12 hours ago
London, United KingdomSenior
Responsibilities
- Design and evolve on-device Swift client SDKs, system frameworks, and XPC services connecting applications and system daemons to Private Cloud Compute.
- Implement high-throughput, low-latency request paths with Protocol Buffers serialization, compression, session lifecycle management, retries, cancellation, and streamed model output.
- Manage concurrency and resources using Swift Concurrency, async/await, AsyncStream, and GCD, including back-pressure and long-lived XPC connection lifetimes.
- Build telemetry, signposts, and privacy-audited logging for diagnosing failures across device, cloud, and inference layers without exposing user data.
- Collaborate with PCC server-side, Foundation Models, attestation, and platform-framework teams; write design documents, lead reviews, and mentor engineers.
- Profile on real Apple hardware with Instruments and improve memory, latency, and energy efficiency.
Requirements
- Experience developing complex system-level frameworks, daemons, or background services for iOS and macOS beyond standard UI-focused application development.
- Strong Swift programming proficiency and experience with Objective-C or C/C++ for lower-level system integration.
- Deep understanding of concurrency, Swift Concurrency, GCD, memory management, and asynchronous network programming.
- Experience with wire protocols, Protocol Buffers, data-streaming pipelines, or connection management is preferred.
- Hands-on experience with Apple's XPC is preferred.
- Familiarity with secure communication protocols, cryptography, privacy-preserving architectures, ML concepts and frameworks, Instruments, and native Apple telemetry and logging APIs is preferred.
- Familiarity with end-to-end device, network, and server systems and their cross-tier failure modes is preferred.
About Apple
Apple designs and sells consumer electronics, software, and services for consumers and professionals worldwide, including iPhone, Mac, iPad, Apple Watch, and AirPods, plus platforms like iOS/macOS and services such as the App Store, iCloud, Music, and TV+. Its business combines device sales with services and subscriptions and in-house silicon design. Founded in 1976, Apple is headquartered in Cupertino, California, and trades on NASDAQ as AAPL.