Senior JavaScript Virtual Machine Compiler Engineer

Cupertino, California, United States
Software and Services


Role Number:200509497
Imagine what you could do here. At Apple, new insights have a way of becoming extraordinary products, services, and customer experiences very quickly. Bring passion and dedication to your job and there's no telling what you could accomplish. Dynamic, amazing people and inspiring, innovative technologies are the norm here. The people who work here have reinvented entire industries with all Apple Hardware products. The same passion for innovation that goes into our products also applies to our practices strengthening our dedication to leave the world better than we found it. Join us to help deliver the next groundbreaking Apple product. Do you love working on challenges that no one has solved yet? As a member of our dynamic group, you will have the extraordinary and phenomenal opportunity to craft upcoming products that will delight and inspire millions of Apple customers every single day.

Key Qualifications

  • 5+ years of relevant experience
  • Detailed knowledge of C and C++
  • Excellent debugging, critical thinking, and interpersonal skills
  • Detailed understanding of data structures and algorithms
  • Experience with compilers, parsers, interpreters, and garbage collectors
  • Experience with assembly-level programming
  • Detailed knowledge of the JavaScript language
  • Experience with performance analysis
  • Experience with open source software development


The WebKit JavaScript Virtual Machine is responsible for executing the JavaScript code found in web pages. It uses type inference, dynamic compilation, and sophisticated compilation optimizations to turn JavaScript programs into efficient machine code on X86 and ARM. JavaScript Virtual Machine engineers work on all aspects of the compilation pipeline, including the parser and lexical analysis, the profile-guided type inference, and the optimizing compiler backend. They also own and maintain the language runtime, the garbage collector, and the JavaScriptCore API for native apps. As a JavaScript Virtual Machine Engineer you will work as a generalist in these areas, diagnosing and fixing performance, stability, standards compliance, and compatibility issues, implementing new language features, and supporting browser and non-browser JavaScript clients.

Education & Experience

Bachelor in computer science or equivalent

Additional Requirements

Pay & Benefits