OS Performance Tools Engineer

Apple•Cupertino, CA

About The Position

The OS Performance Tools team is looking for a passionate and versatile engineer to help Apple engineers and 3rd party developers understand and improve the performance of code running across Apple's platforms (macOS, iOS, watchOS, tvOS, visionOS). The team builds software that Apple engineers and 3rd party developers use to understand & analyze performance of their code, enabling them to ship delightful experiences to Apple customers. This role will initially focus on performance triage and analysis, with a strong emphasis on leveraging AI to scale the team's impact: automating the repetitive parts of investigation, gleaning deeper insights from diagnostics and telemetry, and connecting related issues surfaced across different systems and pipelines. We are looking for someone who is excited to learn broadly across the stack and apply that breadth to make our tools — and the engineers who depend on them — dramatically more effective. In this role, you will spend your time at the intersection of data, systems knowledge, and software engineering. Some days that means diving into performance diagnostics to understand why a user interaction felt slow — tracing the problem through layers of the system and surfacing a finding that helps another team ship a fix. Other days it means stepping back to ask how that same investigation could be faster, more automated, or more insightful at scale, and then building the tooling or AI-assisted workflow to make it so. You will work closely with engineers across many disciplines — systems, graphics, data, and more — learning how Apple's platforms work end to end, and translating that knowledge into tools that make the broader organization more effective. The role rewards curiosity, systems thinking, and a bias toward impact.

Requirements

Excellent problem-solving and critical-thinking skills
Strong OS & Systems fundamentals
Proficient in C/ObjC/Swift or similar language
Prior development experience in Unix, Linux, macOS, or iOS
Aptitude to independently learn new technologies, prototype and propose software design and solutions
Passion for product quality and attention to detail
Excellent spoken and written communication
CS degree or equivalent experience

Responsibilities

Performance triage and analysis
Leveraging AI to scale the team's impact
Automating repetitive parts of investigation
Gleaning deeper insights from diagnostics and telemetry
Connecting related issues surfaced across different systems and pipelines
Diving into performance diagnostics to understand why a user interaction felt slow
Tracing problems through layers of the system and surfacing findings
Building tooling or AI-assisted workflows to make investigations faster, more automated, or more insightful at scale
Working closely with engineers across many disciplines (systems, graphics, data, etc.)
Learning how Apple's platforms work end to end
Translating knowledge into tools that make the broader organization more effective