Senior -Speed I​/O Engineer

Cupertino, California, United States Hardware

Apple's products touch hundreds of millions of people - and the interfaces that connect them to the world depend on getting every signal right. The Hardware Test Engineering group is the team that makes sure they do. As a Senior High-Speed I/O Engineer, you'll own the design, development, and deployment of metrology and test instrumentation systems for Apple's most advanced hardware, spanning the full breadth of Apple's product portfolio.

From the earliest NPI milestones through mass production, your work will directly shape the quality and reliability of products used by people everywhere.

In this role, you will develop and deploy automated instrumentation systems that validate the electrical function and performance of Apple’s high-speed I/O technologies across the entire product lifecycle. You'll partner deeply with System EE, Signal Integrity, Firmware, Software, Silicon Engineering, and Operations to define test strategies, drive instrumentation architecture, analyze complex system behavior, and improve engineering workflows through automation and AI-assisted analytics.

You'll bring the communication skills, analytical rigor, and cross-functional instincts to make those partnerships count. This position requires strong technical depth in high-speed electrical systems, software development, system debugging, and cross-functional leadership to solve challenging engineering problems at scale.

• Design, specify, bring up, validate, and deploy automated instrument systems for high-speed I/O interfaces (USBC, HDMI, Thunderbolt, and more) across Apple's entire product lineup - from NPI through mass production
• Partner with System EE, Signal Integrity, Architecture, Firmware, Operations, and Logistics teams to gather requirements and drive test system strategy
• Collaborate with contract manufacturers and vendors; author SOPs, debug instructions, and technical documentation
• Own test station development and coverage; support hardware bring-up with deep technical dives into open issues
• Apply data-driven and AI-assisted approaches to analyze large-scale instrument data and solve complex engineering challenges
• Perform failure mode and root cause analysis, debugging from system level down to component level
• Manage escalations and communicate findings to engineering teams and executive stakeholders
• Support domestic and international travel as needed (up to 20%)

• BS in Computer Science, Electrical Engineering, or a related field
• 7+ years of relevant professional experience
• Strong software development background, including C, Objective-C, and/or Lua-based library, API, or framework development; application-specific firmware; and scripting
• Solid command of hardware fundamentals: architecture, block diagrams, schematics, and debug interfaces
• Experience with high-speed interconnects and signal integrity (USB, Thunderbolt, Display Port, HDMI, PCIe)
• Proven ability to design, bring up, debug, and automate electrical systems

• MS in Computer Science, Electrical Engineering, or a related field
• Familiarity with test methodology, statistical analysis, and Gauge R&R (GRR)
• Consumer electronics manufacturing experience is a plus
• Demonstrated ability to build meaningful cross-functional partnerships and manage competing priorities across disciplines
• Experience developing or integrating AI tooling to improve engineering workflow quality and efficiency
• Exceptional communicator - written, verbal, and visual - able to convey complex technical topics to diverse audiences including executive leadership

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $184,700 and $324,800, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted…