Mobile Engineer (Flutter)
About The Position
Ostium is on a simple mission: make it possible for anyone with a digital wallet to trade stocks, commodities, currencies, and crypto with full transparency. No brokers, no freezes, no hidden spreads. We’re replacing the opaque, offshore brokerage model with a transparent, permissionless trading stack built onchain. Every trade, deposit, and withdrawal is verifiable through open, auditable code. We’ve raised $27.9M+ from General Catalyst, Jump, LocalGlobe, Susquehanna (SIG), GSR, Alliance DAO, Soma Capital, Balaji Srinivasan, Meltem Demirors, and others. Role We are looking for a Mobile Engineer proficient in Flutter and Dart to build our native mobile trading experience. You should have strong experience with BLoC for state management and be comfortable working in a Clean Architecture codebase.
Requirements
- Core: Flutter 3.x, Dart, BLoC.
- Architecture: Proven experience with Clean Architecture/Feature-First patterns.
- Web3 Integration: Experience with web3dart, eth_sig_util, or similar Ethereum Dart libraries.
- Navigation: Experience with GoRouter.
Nice To Haves
- Previous experience in DeFi or trading platforms
- Understanding of perpetuals trading and RWA markets
- Contributions to open-source projects
- Experience with high-frequency trading systems or real-time data processing
- Understanding of perpetuals trading, RWA markets, and DeFi primitives.
- Experience with GraphQL Code Generator.
Responsibilities
- Application Engineering: Develop high-performance, cross-platform mobile applications that deliver a native-tier experience on both iOS and Android
- Scalable Architecture: Architect scalable and testable codebases using Clean Architecture principles, enforcing strict separation of concerns and modular dependency injection.
- Architecture: Adhere to Clean Architecture or Feature-First patterns, maintaining a strict separation of concerns and utilizing Dependency Injection.
- Web3 Mobility: Integrate mobile-first Web3 features, including WalletConnect, Reown AppKit, or Privy for seamless on-the-go trading.
- Web3 Integration: Architect seamless mobile-first Web3 authentication and wallet connectivity, ensuring secure signing and transaction lifecycles on the go.
- Data Handling: Manage networking via GraphQL and REST, utilizing code generation (freezed/json_serializable) for immutable data models.
- Quality Assurance: Write comprehensive Unit and Widget tests to ensure stability across iOS and Android.
Benefits
- Competitive compensation package
- Opportunity to work with cutting-edge blockchain technology
- Collaborative environment with highly skilled team members
- Flexible work arrangements
- Professional development opportunities
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
