1. Java Big Data Development Engineer (20k-40k) Job Responsibilities: 1. Responsible for data processing including ETL, offline/real-time computing, and building offline/real-time data warehouses. 2. Responsible for supporting the implementation of technical solutions related to upper level data products For example: user profiling, tagging system, risk control warning, real-time reports, etc. 3. Responsible for maintaining big data components, data storage, and solving related problems. 2. Java peripheral service development engineer job requirements: 1.5 years or more of Java project development experience, solid basic skills, strong coding ability; 2. Clear technical thinking, structured thinking, strong problem-solving ability, and providing effective solutions and methods; 3. Proficient in MySQL and NoSQL databases; 4. Proficient in using SpringBoot, SpringCloud, Mybatis, Kafka, etc., familiar with design patterns; 5. Familiar with distributed locks, message caching mechanisms, etc., with some experience in high availability, high concurrency, and high-performance solutions; 6. Familiar with Java multithreading technology; Familiar with Netty, WebSocket, Linux, Docker, etc; 7. Research and development experience in finance, payment web3, digital currency exchanges, etc. is preferred;