Mobile App Engineer
Fullstack is building a low-latency trading command center for volatile crypto markets, enabling users to trade products across chains.
About Fullstack
Fullstack describes its team as market-structure obsessives building next-generation finance tools. Its product is intended to support fast, reliable trading across products and chains, with blockchain, real-time data, API, and execution infrastructure.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will design and implement high-performance iOS features for a full-featured mobile trading app. You will build gesture-driven trading interfaces and interactive charts, integrate native wallet support and biometric authentication, manage transaction signing and on-device key security, and integrate REST APIs and WebSocket streams while maintaining client-side cached state. You will also configure CI/CD pipelines, ensure quality through automated testing, and optimize the app to remain responsive under volatile market conditions.
Requirements
- 3+ years shipping iOS applications in Swift
- Experience with App Store release processes and provisioning
- Deep understanding of iOS performance characteristics, memory management, and background processing
- Experience building real-time systems and managing WebSocket connections and reconnection strategies
- Strong UI/UX design sensibility, wireframing, and prototyping experience
- Ability to make architectural decisions and lead feature development
- Comfortable collaborating in high-bandwidth in-person engineering environments
- Authorized to work in the United States
Responsibilities
- Design responsive iOS features that handle real-time market data
- Build gesture-driven trading interfaces with high information density
- Develop high-performance interactive charts and data visualizations
- Integrate native mobile wallet support and biometric authentication
- Implement secure on-device transaction signing and key management
- Integrate REST APIs and WebSocket streams and manage cached client state
- Configure and maintain CI/CD pipelines, automated builds, previews, and testing
Benefits
- Comprehensive medical, dental, and vision insurance with HSA options
- Generous paid vacation and holidays
- Retirement plan with employer match
