JavaScriptCore Security Engineer

Benefits

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Non-birth-parent leave

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Family-building benefits

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Salary

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401(k) match

Listed Source: EMPLR_CONTRIB_INCOME_AMT. source Last checked Jun 13, 2026.

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Weekend work

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About this role

JavaScriptCore Security Engineer Cupertino, United States of America In this role, you have the opportunity to help secure the JavaScriptCore virtual machine. The JavaScriptCore team at Apple is looking for system programmers with experience in security, especially in programming languages, compilers, and virtual machines. You will be working to deliver a more secure web for all Apple products both proactively, by ensuring new features are implemented securely, and reactively, by responding to and addressing JavaScriptCore's unique security challenges. The work is challenging, and the impact and reach are large. Join us! The JavaScriptCore team in WebKit is responsible for the JavaScriptCore engine, and our mission is to make JavaScript and WebAssembly execution both fast and secure. JavaScriptCore is complex, with many subsystems: the compilation pipeline, the language runtime, the garbage collector and memory allocators, and the API for native apps. These subsystems run untrusted, third-party code, and all of them must do so in a memory safe way. In this role, you will work across all areas of the engine, focusing on improving security and stability. You will drive new innovations in the security architecture of the codebase. You will fix security issues and respond to fuzzing. You will also ensure that security processes in JavaScriptCore are updated to current best practices and set the project up for a secure future. Minimum Qualifications: BS in computer science or equivalent Experience programming in modern C++ Excellent debugging, critical thinking, and communication skills Experience developing privacy and security-sensitive software Experience with compilers,

Read the full description at jobs.apple.com. FewerJobs shows a source-linked preview and links to the original posting.