Frontend Developer Flutter DeFi
KAST is a stablecoin-powered financial platform for storing, earning, moving, and spending digital dollars globally.
Funding history
Investors
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About KAST
KAST provides stablecoin-enabled financial services including global USD and EUR accounts, transfers, yield products, and Visa payment cards accepted worldwide. It operates through licensed financial partners and is explicitly described by its official site as a financial technology company rather than a bank.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will build and own consumer-facing DeFi features for a mobile application. You will turn lending, swap, and borrowing concepts into clear mobile experiences, integrate backend services, manage wallet and transaction states, and contribute to tested, maintainable code and release quality.
Requirements
- 2+ years of production mobile development with Flutter or 3+ years owning shipped consumer applications
- Hands-on DeFi experience with on-chain protocols such as lending, borrowing, staking, swaps, or wallets
- Knowledge of collateral, LTV, health factor, and gas or network fees
- Flutter state management, navigation, clean architecture, and dependency injection
- Experience with REST APIs, authentication tokens, and asynchronous transaction flows
- Knowledge of mobile security practices, secure storage, sensitive-data handling, and MFA flows
- Experience with Git workflows, code review, and App Store or Play Store releases
Responsibilities
- Build and own consumer-facing DeFi features in the mobile application
- Translate DeFi concepts into clear and trustworthy mobile user experiences
- Integrate backend services and implement secure transaction authorization flows
- Manage wallet signing and transaction states with robust error handling and user feedback
- Contribute to tested mobile architecture and shared component patterns
- Write maintainable code and participate in code reviews and release quality
- Collaborate with product and design to deliver features