Sr. WebKit Performance Engineer

Apple • San Diego, CA

1d

About The Position

The WebKit Performance team is looking for an engineer with a passion for
software optimization to support one of the most heavily used frameworks and
applications in the world. WebKit is the system framework for rendering web
content on Apple platforms. When you load a webpage in Safari, that’s WebKit!
WebKit is also an Open Source software project in which Apple engineers
collaborate with engineers from around the world to improve the framework,
evolve web APIs, and ensure the best possible experience on the web. WebKit is a
foundational component of iOS, macOS, watchOS, tvOS, and visionOS, forming the
basis of many key applications. Performance improvements in WebKit make all of
our products better. The WebKit Performance team is responsible for defending
and improving the launch speed, processing speed, memory size, and power
consumption of the WebKit framework. You will help improve WebKit performance on
all Apple platforms.

DESCRIPTION

As a WebKit Performance Engineer, you will seek opportunities to improve WebKit
performance as measured by execution time, memory consumption, and power use.
You will also be responsible for diagnosing performance issues identified in
benchmarks and in web applications, helping us identify and correct recent
performance regressions, and helping to train and mentor others in performance
improvement techniques. Specific job duties will include: Investigating cases
of poor performance in WebKit-based applications Identifying performance
bottlenecks and hot-spots in the WebKit framework. Creating and defending
performance benchmarks covering important web technologies. Working across
teams at Apple to drive improvements in core frameworks. Interacting with
developers on the Open Source WebKit project.

Requirements

• BS in Computer Science or equivalent work experience.
• Expertise in C++.
• Experience with software performance measurement, analysis, and optimization.
• Detailed understanding of data structures and algorithms.
• Experience with pointers, memory management, threads, and processes.

Nice To Haves

• At least 4 years of prior hands-on iOS or macOS application development.
• Experience with Objective-C, Swift, and Cocoa APIs.
• Experience with web technologies (HTML, CSS, JavaScript, SVG, WebGL, WebGPU).
• Experience with UIKit and AppKit.
• Excellent debugging, analysis, communication, and critical thinking skills.

Responsibilities

• Investigating cases of poor performance in WebKit-based applications
• Identifying performance bottlenecks and hot-spots in the WebKit framework
• Creating and defending performance benchmarks covering important web technologies
• Working across teams at Apple to drive improvements in core frameworks
• Interacting with developers on the Open Source WebKit project

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees