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Webassembly Jobs in California (NOW HIRING)

Apple

JavaScriptCore Manager

Cupertino, CA · On-site

The JavaScript team seeks a Software Engineering Manager with deep compiler and virtual machine expertise, ready to support the world's fastest and best JavaScript and WebAssembly VM. The ...

Figma

Software Engineer - C++

San Francisco, CA · On-site +1

You will be developing high-performance client-side systems in C++/WebAssembly, extending the multiplayer protocols that make collaborative design possible, and building out the communications layer ...

Socket.dev

Software Engineer, Frontend

San Francisco, CA · On-site

$160 - $200/hr

Knowledge of WebAssembly and browser-based computation * Background in scientific computing or technical data visualization * Experience building tools for technical users (dashboards, data-editing ...

TikTok

Multimedia Arch Senior Frontend Engineer

San Jose, CA · On-site

$143K - $197K/yr

Our work includes building high-performance Web Players (VoD & Live) and SDKs(TikTok Embed Player, Upload SDK, Audio SDKs etc Multimedia SDKs), pioneering the use of WebAssembly and WebGPU for media ...

Zoo

Senior Software Engineer, Frontend

Los Angeles, CA · On-site +1

Implement advanced AST/code-mods, CodeMirror enhancements, and deep integration with WebAssembly (Wasm) for performance improvements * Utilize Xstate for state management to maintain app consistency ...

Endra

Software Engineer - Product

San Francisco, CA · On-site

$120 - $160/hr

Frontend Interface (Svelte/TypeScript/WebAssembly): A compact, high-performance CAD application delivered directly in the user\'s browser. It is built using Svelte, extensive custom TypeScript, and ...

Apple

JavaScriptCore Manager

Cupertino, CA

$267K - $401K/yr

The JavaScript team seeks a Software Engineering Manager with deep compiler and virtual machine expertise, ready to support the world's fastest and best JavaScript and WebAssembly VM. The ...

Apple

JavaScriptCore Security Engineer

Cupertino, CA

$150K - $277K/yr

Join us! Description 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.

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How much do webassembly jobs pay per hour?

As of Aug 23, 2026, the average hourly pay for webassembly in California is $25.79, according to ZipRecruiter salary data. Most workers in this role earn between $14.83 and $30.13 per hour, depending on experience, location, and employer.

What is a WebAssembly?

A WebAssembly job typically involves developing, optimizing, or integrating WebAssembly (Wasm) modules into web applications or other platforms. Professionals in this role work with languages like Rust, C, or C++ to compile code into Wasm for efficient execution in browsers or other environments. Responsibilities may include performance tuning, security enhancements, and interoperability with JavaScript or other systems.

What does a WebAssembly developer do?

As a WebAssembly developer, you’ll often be responsible for optimizing code for performance, translating software components from languages like C++ or Rust into WebAssembly, and ensuring their seamless integration with existing JavaScript-based applications. You’ll likely collaborate closely with frontend and backend engineers to identify performance bottlenecks, implement new features, and troubleshoot cross-browser compatibility issues. Managing build pipelines, maintaining documentation, and writing tests are also common tasks. This role requires both independent problem-solving and team collaboration to deliver high-quality, efficient web applications.

What skills and qualifications are needed for a WebAssembly position?

To thrive in a WebAssembly developer role, you need strong programming skills in languages like C, C++, or Rust, as well as a solid understanding of modern web technologies like JavaScript, HTML, and CSS. Familiarity with WebAssembly toolchains (such as Emscripten or wasm-bindgen), build systems, and experience optimizing for performance are significant assets. Excellent problem-solving, attention to detail, and effective collaboration are standout soft skills for this position. These abilities are crucial for building high-performance web applications, ensuring seamless integration within development teams, and advancing in this fast-evolving field.

What can I do with WebAssembly?

WebAssembly is a low-level binary format that enables web developers and software engineers to run high-performance code in browsers and other environments. It allows for tasks such as optimizing web applications, developing games, and running computationally intensive programs with near-native speed, often alongside languages like C, C++, or Rust. WebAssembly skills are valuable for roles involving web development, performance optimization, and cross-platform application development.

What are the most commonly searched types of Webassembly jobs in California?

The most popular types of Webassembly jobs in California are:

What are popular job titles related to Webassembly jobs in California?

For Webassembly jobs in California, the most frequently searched job titles are:

What job categories do people searching Webassembly jobs in California look for?

The top searched job categories for Webassembly jobs in California are:

What cities in California are hiring for Webassembly jobs?

Cities in California with the most Webassembly job openings:

Webassembly jobs near you
Infographic showing various Webassembly job openings in California as of August 2026, with employment types broken down into 97% Full Time, 1% Part Time, and 2% Contract. Highlights an 91% Physical, 1% Hybrid, and 8% Remote job distribution, with an average salary of $53,653 per year, or $25.8 per hour.

JavaScript Virtual Machine Compiler Engineer

Apple

Cupertino, CA • On-site, Remote

Full-time

Re-posted 3 days ago

Apple rating

8.0

Company rating: 8.0 out of 10

Based on 677 frontline employees who took The Breakroom Quiz

7th of 30 rated technology retailers

Job description

In this role, you have the opportunity to push the state of the art of JavaScript and WebAssembly performance. The JavaScriptCore team at Apple is looking for system programmers with compiler (especially just-in-time) and virtual machine experience. You will be working to deliver a faster and more secure web for all Apple products by improving JavaScriptCore's already world-class JIT compilers, runtime systems, and the garbage collector. The work is challenging, and the impact is worldwide. Join us.
Description
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 engineers work on all aspects of the engine: the compilation pipeline, the language runtime, the garbage collector, and the API for native apps. The compilation pipeline consists of the parser, the bytecode frontend, profile-guided type profiling, and multiple optimizing compiler backend that turn JS and Wasm programs into efficient ARM and x86 machine code.
In this role, you will work across all areas of the engine, improving the performance, security, and stability of the engine, as well as compatibility with other browsers. You will also help guide the evolution of the JavaScript and WebAssembly languages via public standards. You will drive new innovations, add new optimizations, tune performance, implement language features, in addition to diagnosing and fixing existing problems.
Minimum Qualifications
BS in computer science or equivalent
Experience programming in modern C++
Excellent debugging, critical thinking, and communication skills
Experience with compilers, parsers, and interpreters
Experience with assembly-level programming
Experience with performance analysis
Experience with memory allocators and garbage collectors
Preferred Qualifications
Hands-on experience with VMs with just-in-time compilers (e.g. JavaScript engines and JVMs)
Experience with web browsers
Knowledge of JavaScript and WebAssembly

What Apple employees say

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Benefits

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About Apple

Sourced by ZipRecruiter

Imagine what you could do here! At Apple, new ideas 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, intelligent 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 real 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.

Industry

Computer and electronic product manufacturing

Company size

10,000+ Employees

Headquarters location

Cupertino, CA, US

Year founded

1976

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