Senior Security Software Engineer - iCloud Security Infrastructure

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Senior Security Software Engineer - iCloud Security Infrastructure

Edmonton, Alberta, CanadaSoftware and Services

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At Apple, privacy and security aren't features - they're foundational principles. As a Senior Security Software Engineer on our iCloud Security team within Apple Services Engineering (ASE), you'll be part of a small, elite group of engineers building and protecting the infrastructure that hundreds of millions of people trust with their most personal data every single day. If you have a passion for systems-level security software and want your work to matter at a scale very few engineers ever experience, we'd love to talk.

This isn't security work on the margins. You'll be working deep in the stack - interfacing directly with low-level Linux kernel primitives, designing security architecture that operates at global scale, and making critical technical decisions that shape how iCloud protects its users worldwide. You'll be part of a highly skilled team within Apple Services Engineering that provides foundational security infrastructure underpinning consumer-facing iCloud applications and services. The performance and correctness of the systems we build are paramount. We work directly with low-level Linux kernel interfaces, leveraging asynchronous I/O and multithreaded architecture to build high-throughput, low-latency secure services. In this role, you will not only execute on technical deliverables but serve as a key contributor to the architectural and strategic decisions that define the team's direction.

• Architect, develop, and own security-critical systems software underpinning iCloud services used by hundreds of millions of users worldwide

• Design and implement token-based authentication and authorization systems with a focus on correctness, performance, and resilience

• Work directly with low-level Linux kernel interfaces using asynchronous I/O and multithreaded design patterns to build high-throughput secure services

• Lead security design reviews and drive a culture of security excellence across Apple Services Engineering

• Partner with cross-functional teams across Apple to identify security risks and deliver solutions that raise the bar for the entire platform

• Drive key technical and architectural decisions that influence the team's long-term strategic direction

• BS in Computer Science and/or equivalent experience

• 10+ years of industry experience in systems software engineering

• Deep proficiency in C and/or C++ - writing systems-level code, not just calling libraries

• Strong networking fundamentals including TCP/IP, TLS, and protocol design

• Demonstrated expertise with Unix/Linux internals and operating system concepts

• Solid understanding of software security primitives including cryptography, authentication protocols, and secure coding practices

• Familiarity with distributed systems design principles and token-based architecture

• Strong written and verbal communication skills with the ability to convey complex security concepts to diverse audiences

• Hands-on experience designing or implementing token-based authentication systems such as OAuth, JWT, macaroons, or proprietary token frameworks

• Experience with modern security technologies including HSMs, PKI, secrets management, or secure enclaves

• Familiarity with additional systems languages including Go, Rust, Swift, or Java

• Background in cloud services security, identity and access management (IAM), or internet-scale security infrastructure

• Experience building and operating security systems at large-scale production environments

Apple is an equal opportunity employer that is committed to inclusion and diversity. Apple provides reasonable accommodations to applicants with disabilities. Apple is a drug-free workplace.

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here — in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

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