JavaScript Virtual Machine Compiler Engineer

Santa Clara Valley (Cupertino),California,United States

Software and Services

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**Summary**

Posted:Dec 9, 2022

Weekly Hours: **40**

Role Number: **200431126**

The WebKit JavaScript Virtual Machine is responsible for executing the JavaScript and WebAssembly 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 ARM64. JavaScript Virtual Machine engineers work on all aspects of the compilation pipeline, including the parser and lexical analysis, the profile-guided speculative compiler, and the optimizing compiler backend. They also own and maintain the language runtime, the garbage collector, and the JavaScriptCore API for native apps.

**Key Qualifications**

+ Detailed knowledge of C and C++ Excellent debugging, critical thinking, and communication skills

+ Detailed understanding of data structures and algorithms

+ Experience with compilers, parsers, interpreters, and garbage collectors

**Description**

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**

BS in computer science or equivalent

**Additional Requirements**

+ Experience with compilers, parsers, interpreters, and garbage collectors

+ Experience with assembly-level programming

+ Detailed knowledge of the JavaScript language

+ Detailed knowledge of the WebAssembly language

+ Experience with performance analysis

+ Experience with open source software development

**Pay & Benefits**

+ 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 $161,000 and $278,000, 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 (https://www.apple.com/careers/us/benefits.html) 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.

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