We are currently seeking a Sr. 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.

Responsibilities 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. Requirements 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.

Preferred Qualifications:

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