Senior Mobile Engineer (iOS and Android)

Company Description

Zark Lab is a collaborative AI workspace that enables teams to analyze data at any scale through natural conversation. We provide complete infrastructure - from storage and compute to AI-powered analysis - so users can upload data, ask questions, and get insights without building systems or writing code.

Our platform processes massive datasets and delivers real-time conversational analytics. We're bringing this powerful experience to mobile, enabling teams to analyze data and collaborate from anywhere. Join a team of engineers from leading tech companies who are redefining how people interact with data.

Role Description

We're looking for a Senior Mobile Engineer to build our iOS and Android applications from the ground up. You'll create high-performance mobile experiences that handle real-time AI streaming, file uploads, and collaborative analytics workflows. This is a full-time remote position where you'll have significant ownership over mobile architecture and user experience.

What You'll Build

• iOS and Android applications using React Native
• Real-time streaming interfaces using Server-Sent Events (SSE) for AI-powered analytics
• Responsive mobile UI for data visualization and collaborative workspaces
• Offline-first architecture with smart caching and sync strategies
• Push notifications and real-time collaboration features
• Smooth animations and native-feeling interactions

What You'll Do

• Develop and maintain mobile applications using React Native and TypeScript
• Integrate Server-Sent Events (SSE) for real-time AI streaming on mobile
• Optimize mobile performance: app size, memory usage, battery efficiency, startup time
• Build platform-specific features using native modules when needed (Swift/Kotlin)
• Collaborate with backend engineers to design mobile-optimized API patterns
• Write clean, maintainable code with comprehensive testing and type safety
• Own the mobile release process: TestFlight, Play Store, CI/CD pipelines
• Ship features independently with minimal oversight

Requirements

• Strong experience with React Native and cross-platform mobile development
• Expert-level TypeScript and JavaScript
• Proven experience with real-time streaming on mobile (SSE, WebSockets, or similar)
• Deep understanding of mobile performance optimization - memory management, battery efficiency, app size
• Experience with native modules - ability to write Swift (iOS) or Kotlin (Android) when needed
• Familiarity with mobile CI/CD - Fastlane, App Store Connect, Google Play Console
• Strong communication skills and ability to work independently
• Track record of shipping production mobile applications

Nice-to-Have

• Experience with AI/LLM applications on mobile
• Experience building offline-first mobile apps with sync strategies
• Prior work with mobile data visualization or large file handling
• Experience with push notifications and real-time collaboration features
• Familiarity with React Native performance tools (Flipper, Reactotron, Hermes)
• Experience with mobile security best practices (secure storage, certificate pinning, biometric auth)
• Background in native iOS or Android development before React Native
• Experience with Expo or similar frameworks

Why Join Zark Lab?

• Build a mobile application from scratch with full architectural ownership
• Work on a cutting-edge AI analytics platform bringing desktop power to mobile
• Collaborate with a high-caliber team of former founders and engineers from leading tech companies
• Competitive salary and equity
• Fully remote, flexible work environment
• Modern tech stack with freedom to influence architecture decisions

Apply Now

If you're excited about building high-performance mobile applications that make data analysis accessible anywhere, we'd love to hear from you.