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WebKit Performance Infrastructure Engineer

2 days ago Cupertino, CA

WebKit is the open source browser engine that powers Safari, Mail, and many other applications across iOS, macOS, and visionOS. As a Performance Infrastructure Engineer for WebKit, you will build and maintain critical tools that enable our team to track, investigate, and prevent performance regressions across all Apple platforms.

Description

Our Performance Infrastructure team builds the tooling and infrastructure that enables WebKit engineers to monitor performance metrics and investigate regressions. As WebKit evolves, our infrastructure provides the visibility needed to detect and diagnose performance changes.

We're looking for an engineer to evolve our performance monitoring and testing infrastructure. You'll own and improve the systems that power our performance testing and analysis workflows, and your work will directly impact how WebKit engineers detect and diagnose regressions.","responsibilities":"Own and maintain a performance monitoring dashboard that tracks WebKit performance metrics and manages A/B testing.

Maintain and enhance tools for performance tracking and A/B testing.

Develop and improve benchmarking systems and measurement tools.

Integrate performance tools with continuous integration systems.

Build automation to streamline performance investigation workflows.

Preferred Qualifications

Experience working with HTTP traffic, proxies, or network debugging tools.

In-depth experience with front-end and back-end development.

Proficiency in HTML5, CSS3, and JavaScript.

Strong debugging skills with ability to troubleshoot complex, multi-layered systems.

Experience with continuous integration.

Knowledge of UI/UX design principles.

Experience with Docker and containerization.

Minimum Qualifications

Proficiency in Python or similar languages.

Experience with front-end and back-end web development.

Proficiency in Unix-based systems, ideally macOS.

Familiarity with performance monitoring tools.

Experience with performance analysis or benchmark design.

Understanding of networking concepts.

Strong collaboration and communication skills.

Critical thinking skills with attention to detail.

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Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant .

Client-provided location(s): Cupertino, CA
Job ID: apple-200642570-0836_rxr-660
Employment Type: OTHER
Posted: 2026-01-24T19:20:29

Perks and Benefits

  • Health and Wellness

    • Parental Benefits

      • Work Flexibility

        • Office Life and Perks

          • Vacation and Time Off

            • Financial and Retirement

              • Professional Development

                • Diversity and Inclusion

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