Apple
Software Engineer - Private Cloud Compute, On-Device Client Frameworks
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Software Engineer - Private Cloud Compute, On-Device Client Frameworks
Private Cloud Compute (PCC) – Software Engineer (Swift)
About the Role
The Private Cloud Compute (PCC) team develops Apple's privacy-preserving cloud inference platform—the system enabling generative-AI features such as Apple Intelligence on iPhone, iPad, Mac, and Vision Pro to interact with the cloud while maintaining user privacy.
We are seeking a Software Engineer to join the team responsible for the on-device client side of this pipeline. Your work will focus on designing and shipping Swift frameworks and sandboxed services that every inference request flows through before leaving the device.
This is critical system-level work for Apple’s core platform. Your contributions will be foundational to all Apple Intelligence and Foundation Models workflows, facing rigorous requirements for correctness, performance, and privacy.
Responsibilities
You will be a key contributor to the Swift frameworks and XPC services responsible for interfacing on-device app processes to the PCC system. Below is an overview of core responsibilities:
- Design and evolve the on-device client SDKs and their underlying XPC sandboxed services, striking a balance between intuitive API ergonomics (for client apps) and strict process-isolation and attestation guarantees demanded by PCC.
- Implement scalable request pipelines with:
- High-throughput, low-latency communication paths
- Protobuf-based serialization of inference payloads
- Payload compression techniques
- Multi-turn session management with lifecycle tracking
- Retry/cancellation semantics handling
- Streaming of incremental model output to client applications
- Own concurrency and resource management for:
- Swift Concurrency, GCD, and AsyncStream
- Correct network cancellation and back-pressure application
- Lifetime management of XPC connections
- Build privacy-audited system observability:
- Telemetry to enable on-call engineers to diagnose request failures across device-cloud boundaries
- Privacy-preserving logging and signposts
- Deployment of instrumentation for reliability and diagnostics
- Foster cross-dependencies:
- Close collaboration with PCC server-side, Foundation Models, and platform frameworks teams
- Lead architecture reviews with review documents
- Mentor engineers on Apple platform fundamentals
- Profiling and optimization across all tiers:
- Use Apple’s Instruments tools to analyze real-device performance metrics
- Iterate memory-, latency-, and energy-efficient implementations
- Continuously drive down per-request costs (these frameworks are used on every involcation)
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Requirements
Minimum Qualifications
- Experience with complex system-development for macOS & iOS (beyond conventional UI-focused apps)
- Proficiency in Swift, with practical exposure to Objective-C or C/C++ for lower-level integration
- Deep knowledge in:
- Concurrency (Swift Concurrency, GCD)
- Memory management in async contexts
- Asynchronous network layer development
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Preferred Qualifications
- Experience with wire protocol design (e.g., Protocol Buffers) or streaming pipelines
- Hands-on experience with XPC for bridging sandboxed services is a plus
- Familiarity with:
- Secure communication protocols
- Cryptography best practices
- Privacy-preserving architectures
- Working knowledge of ML uśecases and model inference concepts
- Experience with performance profiling via Instruments
- Implementation of client-side telemetry and logging (leveraging native Apple APIs)
- Comfort with varying architectural tiers, including balance at device-network-cloud boundaries
Our Commitments
At Apple, we believe in diversity: our strengths stem from different perspectives. We’re also committed to accessibility and equal treatment.
As a registered Disability Confident employer, we can support candidates with reasonable accommodations. Apple evaluates qualified applicants on a competitive and equitable basis, regardless of criminal record.
Learn more about inclusion at Apple and the company’s view toward accessibility in the workplace.
Role number: 200670286-2114
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