Database Engineer

• Core Database Operations: Responsible for high-availability deployment, daily monitoring, backup and recovery, and troubleshooting of the company’s MySQL, OceanBase, Redis, MongoDB, and Oracle databases. Large-Scale Migration & Upgrades: Lead TB-level online database migrations across data centers and across clouds, such as Azure / AWS, version upgrades, and data archiving projects, ensuring zero business interruption and zero data loss.
• Performance Optimization & Stability: Analyze slow queries and design appropriate indexes; optimize Redis cache hit rate and MongoDB aggregation pipeline performance; resolve high-concurrency bottlenecks such as logistics trajectory write peaks and inventory deduction.
• Architecture Design & Standards: Participate in business database schema reviews; develop sharding solutions, such as ShardingSphere / Proxy, and read-write separation solutions; refine DBA operations SOPs and full-lifecycle data governance.
• Automation & Cost Management: Develop automated operations tools, including backup verification, health inspection, and capacity forecasting.
• Collaborative Support: Work with development and operations teams to diagnose and fix database-related issues for the logistics order system, POS / DMS, real-time dashboards, and more.

We are currently seeking a Database Engineer for our Logistics client in Montebello, CA. This person will need to be fluent in Manderine, have 5+ years of experience as a DBA, deep MYSQL, Oracle familiarity, and large scale migration experience. The position is fully on-site with some travel as needed., * Bachelor’s degree or above in a computer-related major, with 5+ years of DBA experience, including at least 3 years of DBA experience in large-scale online production environments with average daily QPS > 10,000.

• Deep MySQL expertise: familiar with InnoDB internals, GTID replication, Orchestrator high availability, and hands-on sharding experience.
• Redis proficiency: familiar with 5+ data structures, persistence mechanisms such as RDB / AOF, cluster scaling, hot-key governance, and big-key governance.
• Oracle familiarity: daily operations and performance optimization.
• Large-scale migration experience: led at least 2 TB-level cross-data-center / cross-cloud smooth database migration projects using tools such as DTM, OMS, or gh-ost.
• Performance tuning ability: able to independently perform deep optimization across hardware, operating system, database parameters, SQL, and architecture, and produce quantifiable reports., * DBA experience with cross-border logistics, e-commerce, or financial transaction systems, with an understanding of multi-region data compliance such as GDPR.
• Familiarity with other databases, including TiDB, ClickHouse, and Elasticsearch.
• Proficiency in Python / Go / Shell, with experience building automated DBA tool platforms.
• Cloud vendor certifications, such as AWS SAA / DOP or Alibaba Cloud ACP / ACE, or database certifications such as OCP or MCDBA.
• Experience operating stateful databases in Kubernetes environments