OCS Billing Service Engineer

Job Responsibilities
1. Be responsible for the routine O&M, inspection, monitoring and check, and log analysis of the carrier's core charging system (OCS), ensuring the stable running of charging services.
2. Be responsible for troubleshooting faults on the live network, quickly locating problems such as CDR exceptions, CDR loss and duplicate CDRs, batch task failures, charging freezing, accounting exceptions, and interface faults, and completing problem closure, review, and rectification.
3. Be responsible for the maintenance of charging system changes, including parameter configuration, tariff policy adjustment, patch upgrade, version iteration, service cutover, and regression verification. Strictly control change risks to ensure zero impact on services.
4. Be responsible for charging data audit and accounting check to ensure that the charging data on the entire network is accurate and the revenue is correct, and eliminate the risks of charging errors and fund loss.
5. Be responsible for system DR, high availability, and cluster status inspection, regularly perform DR drills, and identify single point of failure (SPOF) risks to ensure the high reliability of the charging system.
6. Cooperate with the customer to provide service support, answer questions, and ensure key service assurance at major nodes. Accumulate O&M cases and operation specifications to improve O&M stability.
Skills Required
1. Be familiar with Huawei's overall charging architecture, and master the complete service process and CDR processing link of the OCS online charging and offline charging services.
2. Be proficient in Linux system O&M, basic database operations, log check, and basic middleware principles, and be able to independently locate system, task, interface, and data faults.
3. Be familiar with the batch charging processing mechanism, tariff policies, and the ability to analyze and handle task blocking problems.
4. Master the high availability, active/standby switchover, and disaster recovery mechanisms of the charging system, be able to identify risks, and be able to avoid risks in change operations.
5. Have strong problem locating logic and problem review and summary capabilities, be able to independently handle difficult faults, and output rectification solutions and O&M reports.
6. Be familiar with carriers' O&M specifications and information security requirements, and be able to provide 24/7 emergency response and key event assurance during major holidays.

Education and Major requirements
Bachelor degree or above, majoring in software engineering or related fields.
Project Experience
Preference will be given to those who have worked on payment-related projects.