WebKit Performance Infrastructure Engineer

WebKit Performance Infrastructure Engineer

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.

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.

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.

Preferred Qualifications

• Experience working with 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.