You will architect a browser-native execution environment that delivers instant development experiences. By leveraging WebAssembly and high-performance bundling, you will build a secure, isolated runtime for running dependencies and applications entirely within the browser. This role is critical for setting the technical direction of infrastructure that enables seamless, high-performance AI-driven design workflows.
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San Francisco, United States / Remote$100K – $300K + Equity
Frontend Architect – WebAssembly & Bundling at VC-backed AI design platform
Are you a systems engineer who loves pushing the boundaries of the browser? We are looking for a Frontend Architect to build a high-performance, browser-native execution environment using WebAssembly. This well-funded startup is reinventing design tools for the AI era, and you'll be at the center of their infrastructure, crafting virtual filesystems and secure sandboxes. If you have 8+ years of experience and a passion for WASM and runtime engineering, this is a unique chance to join a high-growth team backed by the world's top-tier VCs.
Overview
Role overview
Company
About the company
VC-backed AI design platform
Responsibilities
What you will do
- Architect a browser runtime featuring Node-like execution, task orchestration, and streaming I/O.
- Build and optimize a high-performance virtual filesystem including in-memory persistence and module resolution.
- Design and implement secure sandboxing and isolation protocols for running untrusted code safely in the browser.
Candidate profile
Who this is a fit for
- Has 8+ years of experience building systems software and platform architecture at high-growth tech companies.
- Possesses deep expertise in WebAssembly (WASM), including ABI boundaries, memory models, and host interfaces.
- Demonstrates a proven track record of engineering performance-critical runtimes, event loops, and browser-based storage systems.
What makes it remarkable
Why this role is remarkable
- You will build deep systems-level infrastructure within the browser, moving beyond traditional frontend engineering into runtime and compiler territories.
- The company is a well-funded startup backed by top-tier VCs and industry leaders, operating at the intersection of AI and design tools.
- You will join a high-talent density team of builders and former founders in a fast-paced, high-growth environment with significant ownership.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack