Staff Frontend Architect (WebAssembly & Runtime Systems)

Location: Remote (US) | San Francisco (On-site/Hybrid) | Bangalore (In-Person)
Compensation: $100K–$300K + Competitive Equity
Employment Type: Full-Time
Visa: H1B transfers welcome (no new sponsorship)

 

About the Role

A well-funded, early-stage AI product company is building a next-generation browser-native platform for product and design teams. Backed by top-tier investors and led by experienced founders, the team is reinventing how modern tooling runs in the browser.

We’re hiring a Staff Frontend Architect to own a browser-native execution environment capable of running dependencies, tooling, and applications entirely inside the browser with strong isolation and performance.

This is a runtime / systems engineering role — not a traditional frontend position.

You’ll define technical direction and ship production-grade platform infrastructure under real browser constraints.

 

What You’ll Do

• Architect a browser-based runtime (Node-like execution, task orchestration, streaming I/O)
• Build a high-performance virtual filesystem (in-memory + persistence, caching, module resolution)
• Integrate and optimize JS/TS tooling pipelines
• Drive performance improvements (cold start, incremental updates, memory usage)
• Design secure sandboxing for untrusted code
• Lead architectural decisions and mentor engineers

Requirements

• 8–12+ years building systems software
• 3+ years owning runtime or platform architecture
• Deep WebAssembly (WASM) expertise (ABI boundaries, memory models, host interfaces)
• Strong browser platform knowledge (Workers, messaging, storage, isolation)
• Runtime engineering expertise (event loops, scheduling, concurrency, streaming I/O)
• Performance engineering discipline with measurable impact
• Experience running untrusted code securely in the browser
• Proven ability to architect and ship production systems

​​​​​​​Ideal Background

• Experience building with WebAssembly at a high-growth tech company
• Comfortable operating in early-stage, high-ownership environments
• Excited to work alongside high-talent-density product and frontend engineers

​​​​​​​Additional Details

• Fully remote within the US or in-person in SF or Bangalore
• Competitive equity package
• Early-stage company (~20 employees)
• Recently raised significant venture funding

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