About the company
We founded Ostium with a simple mission: Anyone with a digital wallet should be able to trade stocks, commodities, currencies, and crypto in one place, with full transparency. This started in a hacker house, running arbitrage on offshore CFD brokers - until they froze our accounts and withheld our deposits. We learned the hard truth: their terms meant nothing. The Market We're Going After. CFDs are the world’s largest retail derivatives market - over $10T monthly volume across every major asset class - but they're built on black-box execution, custodial discretion, and antiquated tech. We’re turning that system on its head. Ostium is building a decentralized perpetuals protocol for real-world markets, with onchain transparency replacing blind trust. Spreads, liquidations, and collateral are visible to everyone. No brokers. No freezes. No hidden spreads.
Job Summary
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.
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.
If you’re passionate about blockchain and decentralized technologies, explore more opportunities in web3 and cryptocurrency careers.
