Frontend Architect
Jack & Jill
Job Overview
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Job Description
Company Description
This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. The company is a VC-backed AI design platform. Jack and Jill will pick the best candidates from Jack's network.
Job Description
As a Frontend Architect, 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.
Location
San Francisco, USA
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.
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.
The ideal candidate
- 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.
Key skills/competency
- Frontend Architecture
- WebAssembly (WASM)
- Browser Runtime
- Systems Software
- Bundling Technologies
- Virtual Filesystem
- Sandboxing
- Performance Optimization
- AI Design Platforms
- Platform Architecture
How to Get Hired at Jack & Jill
- Engage with Jack's AI: Talk to Jack on the Jack & Jill website to have your experience and ambitions understood and matched.
- Highlight WebAssembly expertise: Emphasize deep knowledge of WASM, ABI boundaries, and memory models in your resume.
- Showcase systems software experience: Detail your track record in building performance-critical runtimes and browser-based storage.
- Tailor your application: Customize your resume and cover letter to reflect alignment with AI design platforms and high-growth environments.
- Prepare for technical depth: Be ready to discuss browser runtime architecture, virtual filesystems, and sandboxing protocols.
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