Java Backend Engineer
Job Description
Responsibilities
- Design and develop backend systems for on-chain payment flows, including wallet interactions, transaction broadcasting, and confirmation tracking
- Integrate with blockchain networks (EVM-compatible chains and others) for on-chain fund settlement
- Build APIs and services that connect banking channels with on-chain liquidity
- Collaborate with the P2P and Fiat teams on cross-system integrations
- Ensure transaction reliability, idempotency, and fault tolerance across on-chain and off-chain systems
- Monitor chain status and handle edge cases such as reorgs, gas spikes, and failed transactions
Requirements
- 3–5 years of Java backend development experience
- Experience with Web3/blockchain development: on-chain interactions, wallet integrations, smart contract calls
- Familiarity with EVM chains (Ethereum, BSC, etc.) or other L1/L2 ecosystems
- Proficiency in Spring Boot and common distributed system components
- Fluency in English is required to be able to coordinate with overseas partners and stakeholders. Additional languages would be an advantage.
- Experience in fintech or crypto payment systems is a strong plus
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