Remote Staff Frontend Architect: WebAssembly & Bundling

Crossing Hurdles; United States; Remote; USD 100,000 - 300,000; Full time

Job summary

A global recruitment consultancy is seeking a Staff Frontend Engineer with extensive experience in building systems software and strong WebAssembly expertise. This remote position requires a candidate who can integrate and optimize tooling pipelines while driving performance improvements. An ideal candidate should possess 8+ years of experience in high-growth tech environments, demonstrating a solid understanding of runtime architecture and performance engineering. This is an individual contributor role without people management responsibilities.

Qualifications

• 8+ years of experience building systems software in high-growth tech environments.
• Experience as a Full-Stack or Frontend Engineer.
• Strong WebAssembly (WASM) expertise in ABI boundaries and memory models.

Responsibilities

• Design and build a high-performance virtual filesystem.
• Integrate and optimize bundling and tooling pipelines.
• Drive measurable performance improvements across execution paths.

Skills

WebAssembly expertise

Integration of JS/TS tooling pipelines

Performance engineering

Building high-performance virtual filesystems

Job description

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