Remote Staff Frontend Architect: WebAssembly & Bundling

Crossing Hurdles is a global recruitment consultancy partnering with a startup who is building a next-generation AI-native design platform where every visual edit becomes real, executable code in real time with lean team of 19 members and funding of $44M backed by leaders from Microsoft, OpenAI, Perplexity, and Notion.
Role:

Staff Frontend Engineer – WebAssembly & Bundling
Compensation:

$100k - $300k + Equity
Location:

US (Remote)
Experience:

8–12+ years (3+ years owning runtime/platform architecture)
Work Model:

IC role (Not a people-management position)
Collaboration:

Willing to overlap with the India team (early mornings/evenings in US)
Requirements
8+ years of experience building systems software in high-growth tech environments
Experience as a Full-Stack or Frontend Engineer
Strong WebAssembly (WASM) expertise — ABI boundaries, memory models, host interfaces
Experience integrating and optimizing JS/TS tooling pipelines
Performance engineering discipline with measurable improvements (cold start, incremental builds, memory)
Experience building high-performance virtual filesystems (in-memory + persistence, caching, module resolution)
Design and build a high-performance virtual filesystem
Integrate and optimize bundling and tooling pipelines
Drive measurable performance improvements across execution paths
Design secure sandboxing and isolation for untrusted code execution
Set technical direction for runtime architecture
Mentor engineers while remaining a hands-on individual contributor

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