Principal Mobile Application Developer

Responsibilities

• Own the mobile app architecture, feature architecture, device experiences, pairing and provisioning flows, and consumer-facing behavior.
• Make mobile technology decisions and build hands-on in React Native, Expo, and TypeScript for iOS and Android.
• Define capability-based device definitions and onboard new products in partnership with embedded, cloud, hardware, and product teams.
• Develop reusable components, patterns, libraries, layered UI components, and semantic theming systems.
• Establish and document mobile engineering patterns and best practices and drive adoption across teams.
• Own testing and automation strategy, crash and performance targets, staged rollout, and field issues from real homes.
• Solve complex BLE, WiFi, device protocol, WebSocket, and real-hardware reliability problems.
• Lead technical research, proof-of-concept validation, and architectural decision-making.
• Mentor mid-level and senior engineers through design reviews, code reviews, and pairing.
• Coordinate technical roadmaps and delivery with distributed teams in the UK, China, and other regions.
• Champion AI-assisted development workflows and shared engineering practices.
• Write design documents, drive technical decisions to closure, and remain accountable for production outcomes.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related field is required.
• At least 8 years of software engineering experience with deep React Native and TypeScript expertise at consumer scale.
• Experience owning the architecture of a large-scale consumer mobile app from design through launch and long-term support.
• Demonstrated technical leadership, including setting direction and influencing engineers through design and code review.
• Strong knowledge of full-stack architecture, mobile-to-cloud integration, API contracts, caching, real-time synchronization, and failure and retry behavior.
• Fluency with Xcode, Android Studio, Git, Gradle, CocoaPods, Swift Package Manager, CI/CD, staged rollout, and production diagnostics.
• Native Swift and/or Kotlin expertise sufficient to debug across the bridge and implement platform-specific behavior.
• Experience with Expo Router, typed routes, config plugins, custom native modules, TanStack Query, Reanimated, and mobile build systems is preferred.
• Experience with binary device protocols, connected devices, IoT ecosystems, BLE, WiFi provisioning, or hardware product launches is preferred.
• Experience with Rust, C, C++, robotics, consumer electronics, smart home products, or firmware collaboration is preferred.
• Experience using AI-assisted development tools is preferred.

Benefits

• Medical, dental, and vision insurance.
• Flexible spending accounts and health savings accounts with company contribution.
• 401(k) retirement plan with matching and employee stock purchase program.
• Life insurance, AD&D, short-term disability, and long-term disability insurance.
• Generous paid time off, company holidays, and parental leave.
• Identity theft protection, pet insurance, prepaid legal insurance, and backup child and eldercare days.
• Product discounts, referral bonus program, wellness programs, learning programs, and professional growth opportunities.