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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 ...

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 ...

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 ...

Hark

Audio Software Engineer

San Jose, CA · On-site

$170K - $400K/yr

Ship DSP to the client as C++/Rust compiled to WebAssembly, and as TypeScript in the audio pipeline * Tune endpointing, interruption, and turn-taking so the agent listens like a person * Reduce ...

Zoo

Senior Software Engineer, Frontend

Los Angeles, CA · Remote

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 ...

Figma

Software Engineer, C++

San Francisco, CA · On-site

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 ...

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.

Endra AI

Software Engineer - Product

San Francisco, CA · On-site

$175K - $250K/yr

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 ...

Hark

Audio Software Engineer

San Jose, CA · On-site

$170K - $400K/yr

Ship DSP to the client as C++/Rust compiled to WebAssembly, and as TypeScript in the audio pipeline * Tune endpointing, interruption, and turn-taking so the agent listens like a person * Reduce ...

Zoo

Senior Software Engineer, Frontend

Los Angeles, CA · On-site +1

$145K - $195K/yr

Familiarity with WebAssembly (Wasm) and its use in web applications for performance enhancements * Understanding of browser internals across major browsers (Chrome, Firefox, Chromium, Brave, etc ...

Capsule.Video Inc

Frontend Engineer

Los Angeles, CA · On-site

Bonus points for: * API development with Node.js * WebAssembly and/or WebGL * AI Engineering * Familiarity with CI/CD and APM tools Perks & Benefits * Salary between 100k-170k USD +equity

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How much do webassembly jobs pay per hour?

As of Aug 6, 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.

Should I learn WebAssembly?

WebAssembly is a low-level binary format that enables high-performance applications on the web, making it valuable for developers working on performance-critical projects. Learning WebAssembly can complement skills in JavaScript and C/C++, and is useful for roles involving web development, game development, or browser-based applications. Familiarity with tools like Emscripten and understanding of web technologies are beneficial for working with WebAssembly.

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 used by WebAssembly developers to create high-performance web applications, enabling code written in languages like C, C++, and Rust to run efficiently in browsers. It allows for tasks such as gaming, video editing, and complex computations to be performed faster than traditional JavaScript. WebAssembly developers often work with tools like Emscripten and integrate it with JavaScript frameworks to enhance web functionality.

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 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 July 2026, with employment types broken down into 67% Full Time, and 33% Contract. Highlights an 100% In-person 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 16 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

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

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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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