Senior Security Software Engineer iCloud Security Infrastructure

At Apple privacy and security arent features - theyre foundational principles. As a Senior Security Software Engineer on our iCloud Security team within Apple Services Engineering (ASE) youll 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 wed love to talk.

This isnt security work on the margins. Youll 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. Youll 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 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 teams direction.

Architect develop and own security-critical systems software underpinning iCloud services used by hundreds of millions of users worldwidenDesign and implement token-based authentication and authorization systems with a focus on correctness performance and resiliencenWork directly with low-level Linux kernel interfaces using asynchronous I/O and multithreaded design patterns to build high-throughput secure servicesnLead security design reviews and drive a culture of security excellence across Apple Services EngineeringnPartner with cross-functional teams across Apple to identify security risks and deliver solutions that raise the bar for the entire platformnDrive key technical and architectural decisions that influence the teams long-term strategic direction

BS in Computer Science and/or equivalent experiencen10 years of industry experience in systems software engineeringnDeep proficiency in C and/or C - writing systems-level code not just calling librariesnStrong networking fundamentals including TCP/IP TLS and protocol designnDemonstrated expertise with Unix/Linux internals and operating system conceptsnSolid understanding of software security primitives including cryptography authentication protocols and secure coding practicesnFamiliarity with distributed systems design principles and token-based architecturenStrong 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 frameworksnExperience with modern security technologies including HSMs PKI secrets management or secure enclavesnFamiliarity with additional systems languages including Go Rust Swift or JavanBackground in cloud services security identity and access management (IAM) or internet-scale security infrastructurenExperience building and operating security systems at large-scale production environments