korawu
Java Development Engineer
- 10-year senior Java backend expert in high-concurrency distributed systems & global payment infrastructure.
- Led 20+ payment channel integrations (Alipay/PayPal/Citibank/Adyen/PIX). roficient in payment routing & reconciliation.
- P Blockchain basics: ERC20/721, Web3j, RPC; skilled in English technical documents.
Experience: 10 years
Yearly salary: $80,000
Hourly rate: $30
Nationality: 🇨🇳 China
Residency: 🇨🇳 China
Experience
Senior R&D Engineer
Didi Global 2021 - 2025
Built overseas payment infrastructure supporting 500k+ daily transactions with 98.5%+ success rate. Optimized payment routing (-15% cost) & built auto-reconciliation (-80% manual work)
Senior Java Engineer
Baiwang 2017 - 2021
Developed unified payment center; reduced platform integration from 2 weeks to 3 days
Java Engineer
Gome Online 2016 - 2017
E-commerce order/payment; Improved unit testing to reduce online production bugs by 30%
Skills
solidity
java
english
chinese-mandarin