WebKit Performance Infrastructure Engineer

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.

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.

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.

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.

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.

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 $147,400 and $272,100, 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 stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

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

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

Learn about reasonable accommodations for job applicants

Apple accepts applications to this posting on an ongoing basis.