We are on a mission to reinvent how designers work in the AI era. Backed by top investors from OpenAI, Google, Stripe, Notion and Dropbox, we're building the next-generation AI design tool for product teams.
We're hiring a Frontend Architect - WebAssembly & Bundling to own a browser-native execution environment that delivers instant dev experiencesrunning dependencies, tooling, and applications entirely inside the browser with strong isolation and performance.
This is a runtime and systems engineering role, not a typical frontend or OS position. You'll set technical direction and ship production-grade platform infrastructure under real browser constraints.
What You'll Do:
- Architect a browser 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 (cold start, incremental updates, memory).
- Design secure sandboxing for untrusted code.
- Lead architecture decisions and mentor engineers.
Must-Have Requirements:
- 812+ years building systems software; 3+ years owning runtime or platform architecture.
- Strong WebAssembly/WASM experience (ABI boundaries, memory models, host interfaces).
- Deep browser platform knowledge (Workers, messaging, storage, isolation).
- Runtime engineering expertise (event loops, scheduling, concurrency, streaming I/O).
- Performance engineering discipline with measurable results.
- Security experience running untrusted code in the browser.
- Proven ability to architect and build production systems.
Benefits:
- Base Salary: Above market; we've raised a considerable amount of capital and offer competitive cash compensation.
- Equity: Meaningful stock options.
- Health Insurance: Best-in-class coverage for the employee and their entire family.
- Location: San Francisco HQ or Bengaluru Office.
