Stealth AI
Senior Frontend/Fullstack Engineer
Bay Area, CA On-Site Full-Time
What You'll Do
Own and architect the frontend across web and mobile (iOS & Android) - from design system to production deployment
Build the companion app that serves as the primary interface for intelligent home devices
Collaborate closely with the AI/voice engineering team to surface real-time ASR and TTS capabilities in seamless user experiences
Define frontend standards, performance benchmarks, and component architecture from the ground up (0 1)
Work directly with the founder and US team on product direction, design decisions, and technical strategy
Drive performance optimisation - latency, responsiveness, and offline capability matter deeply in a smart home context
Contribute to hiring and building out the frontend function as the company scales
What We're Looking For
Must-Haves
4-8 years of frontend engineering experience, with mid to Senior level tenure at a top-tier product company
Deep expertise in React and TypeScript for web; React Native or Swift/Kotlin for mobile
Proven track record shipping consumer-facing products at scale - you've owned the full frontend of something people actually use
Strong eye for design and UX - you can translate complex functionality into clean, intuitive interfaces
Experience building real-time or event-driven UIs (WebSockets, streaming responses, live state management)
Ability to work autonomously - you don't need to be told what to do, you identify problems and solve them end to end
Comfortable with ambiguity and fast pace; startup 0-to-1 experience strongly preferred
Strong Bonus
Experience at companies like Figma, Webflow, Inworld AI, Linear, Vercel, or similar high-bar product companies
Exposure to voice AI, ASR/TTS interfaces, or audio-driven UX
Experience with hardware companion apps or IoT device interfaces (smart home, wearables, consumer electronics)
Background in performance-critical frontends - animation, WebGL, canvas rendering, or similar
Rust or systems-level programming familiarity (the broader eng team works in Rust)
Design system architecture experience - building from scratch, not inheriting
Tech Stack
Web: React, TypeScript, Next.js / Vite, TailwindCSS or CSS-in-JS
Mobile: React Native (primary) and/or native iOS (Swift) / Android (Kotlin)
Real-time: WebSockets, streaming APIs, state management (Zustand / Jotai / Redux)
Backend integration: RESTful & GraphQL APIs, LLM/voice AI endpoints
Tooling: Figma (design handoff), GitHub, modern CI/CD pipelines
(Nice to have) Rust - the AI/voice team uses it heavily
Interview Process
L1: Technical discussion - frontend architecture, system design, past projects
L2: Product + design sensibility round - how you think about user experience
L3: Culture & vision fit with CEO
or continue with email
Senior Frontend/Fullstack Engineer
Bay Area, CA On-Site Full-Time
What You'll Do
Own and architect the frontend across web and mobile (iOS & Android) - from design system to production deployment
Build the companion app that serves as the primary interface for intelligent home devices
Collaborate closely with the AI/voice engineering team to surface real-time ASR and TTS capabilities in seamless user experiences
Define frontend standards, performance benchmarks, and component architecture from the ground up (0 1)
Work directly with the founder and US team on product direction, design decisions, and technical strategy
Drive performance optimisation - latency, responsiveness, and offline capability matter deeply in a smart home context
Contribute to hiring and building out the frontend function as the company scales
What We're Looking For
Must-Haves
4-8 years of frontend engineering experience, with mid to Senior level tenure at a top-tier product company
Deep expertise in React and TypeScript for web; React Native or Swift/Kotlin for mobile
Proven track record shipping consumer-facing products at scale - you've owned the full frontend of something people actually use
Strong eye for design and UX - you can translate complex functionality into clean, intuitive interfaces
Experience building real-time or event-driven UIs (WebSockets, streaming responses, live state management)
Ability to work autonomously - you don't need to be told what to do, you identify problems and solve them end to end
Comfortable with ambiguity and fast pace; startup 0-to-1 experience strongly preferred
Strong Bonus
Experience at companies like Figma, Webflow, Inworld AI, Linear, Vercel, or similar high-bar product companies
Exposure to voice AI, ASR/TTS interfaces, or audio-driven UX
Experience with hardware companion apps or IoT device interfaces (smart home, wearables, consumer electronics)
Background in performance-critical frontends - animation, WebGL, canvas rendering, or similar
Rust or systems-level programming familiarity (the broader eng team works in Rust)
Design system architecture experience - building from scratch, not inheriting
Tech Stack
Web: React, TypeScript, Next.js / Vite, TailwindCSS or CSS-in-JS
Mobile: React Native (primary) and/or native iOS (Swift) / Android (Kotlin)
Real-time: WebSockets, streaming APIs, state management (Zustand / Jotai / Redux)
Backend integration: RESTful & GraphQL APIs, LLM/voice AI endpoints
Tooling: Figma (design handoff), GitHub, modern CI/CD pipelines
(Nice to have) Rust - the AI/voice team uses it heavily
Interview Process
L1: Technical discussion - frontend architecture, system design, past projects
L2: Product + design sensibility round - how you think about user experience
L3: Culture & vision fit with CEO
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