Java Backend Engineer – On-Chain Payment Integration
🇮🇳 India | 🇸🇬 Singapore | 🇯🇵 Japan | 🇹🇭 Thailand | 🇨🇳 China | 🇮🇩 Indonesia | 🇧🇩 Bangladesh | 🇮🇷 Iran | 🇯🇴 Jordan | 🇰🇿 Kazakhstan | 🇲🇾 Malaysia | 🇳🇵 Nepal | 🇵🇰 Pakistan | 🇵🇭 Philippines | 🇰🇷 South Korea | 🇱🇰 Sri Lanka | 🇹🇼 Taiwan | 🇹🇷 Turkey | 🇻🇳 Vietnam | 🇱🇧 Lebanon | 🇲🇲 Myanmar | 🇱🇦 Laos | 🇾🇪 Yemen | 🇲🇻 Maldives | 🇴🇲 Oman
Java
Finance
Machine Learning
Design
Blockchain
Backend
Java Backend Engineer – On-Chain Payment Integration
from 🇮🇳 India | 🇸🇬 Singapore | 🇯🇵 Japan | 🇹🇭 Thailand | 🇨🇳 China | 🇮🇩 Indonesia | 🇧🇩 Bangladesh | 🇮🇷 Iran | 🇯🇴 Jordan | 🇰🇿 Kazakhstan | 🇲🇾 Malaysia | 🇳🇵 Nepal | 🇵🇰 Pakistan | 🇵🇭 Philippines | 🇰🇷 South Korea | 🇱🇰 Sri Lanka | 🇹🇼 Taiwan | 🇹🇷 Turkey | 🇻🇳 Vietnam | 🇱🇧 Lebanon | 🇲🇲 Myanmar | 🇱🇦 Laos | 🇾🇪 Yemen | 🇲🇻 Maldives | 🇴🇲 Oman
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









