3 months ago
Singapore, SingaporeSenior
Responsibilities
- Design, develop, and optimize OKX Pay payment backend systems for high availability, concurrency, scalability, and reliability.
- Build QR and scan-to-pay functionality including payment-code generation, scan recognition, order creation, confirmation, state transitions, timeout handling, risk validation, and exception compensation.
- Implement transaction processing for orders, payments, clearing and settlement, reconciliation, refunds, and callback notifications.
- Build crypto and stablecoin payment capabilities covering on-chain transfers, transaction confirmation, address management, asset crediting, and payment-status synchronization.
- Diagnose complex production issues involving performance bottlenecks, data consistency, fund-security risks, and abnormal transaction scenarios.
- Improve architecture, code quality, monitoring, alerting, observability, and payment-system maintainability.
Requirements
- Solid Java development skills and fluency with Spring Boot and mainstream Java backend frameworks.
- Hands-on experience with payment-system flows including payment orders, state machines, callbacks, reconciliation, refunds, clearing and settlement, and exception compensation.
- Experience with scan-to-pay, acquiring, aggregated payments, merchant payments, wallet payments, or similar products.
- Ability to design reliable transaction paths, state transitions, idempotency, retry, and compensation mechanisms.
- Understanding of data consistency, transaction handling, deduplication, concurrency protection, risk validation, and fund security.
- Familiarity with crypto and stablecoin payments, on-chain transfers, transaction confirmation, address systems, Gas, and crediting confirmation.
- Ability to troubleshoot production issues using log analysis, tracing, performance optimization, and recovery techniques.
- Experience with stablecoin payments involving USDT or USDC is preferred.
- Experience with QR payments, merchant acquiring, payment gateways, cross-border payments, offline payments, account and ledger systems, or reconciliation systems is preferred.
- Familiarity with EVM, Tron, Solana, or other mainstream blockchain transaction and asset-transfer mechanisms is preferred.
- Understanding of payment risk control, anti-fraud, limits, allow/deny lists, KYC/KYT, and AML mechanisms is preferred.
Benefits
- Competitive total compensation.
- Comprehensive insurance coverage for employees and their dependants.
About OKX
OKX builds a global cryptocurrency exchange and Web3 wallet used by retail and institutional traders for spot, derivatives, and DeFi access, with developer APIs. Its business model centers on trading and financing fees, plus wallet and on-chain services. Founded in 2017 and privately held, OKX publishes monthly proof-of-reserves and operates as part of the OKG group serving crypto markets worldwide.