Database Engineer(DBA)

Responsibilities

• Design and architect database schemas and storage solutions across MySQL, PostgreSQL, Redis, MongoDB and HBase, implement and deploy database clusters, replication, and environment configurations to meet business requirements.
• Monitor database performance and health metrics with proactive alerting and dashboards; troubleshoot and resolve incidents including slow queries, replication lag, connection exhaustion, and data corruption.
• Optimize query performance, indexing strategies, and resource utilization; maintain systems through version upgrades, patch management, and backup/recovery testing to ensure long-term reliability.
• Ensure high availability and disaster recovery via failover, hot-standby, and multi-region replication architectures; drive scalability through sharding, partitioning, and capacity planning to support business growth.
• Build end-to-end fault detection, root-cause localisation, and self-healing capabilities; drive zero-business-impact database protection through SQL auditing, slow query governance, index optimisation, and execution plan analysis.
• Design and develop computer software or utility toolkits to automate and more efficiently manage large-scale database instances.
• Collaborate closely with application development teams to diagnose performance lantency, improve query efficiency and strengthen data reliability across services.
• Responsible for participating in a 24*7 on-call rotation to ensure high availability and resolving critical database issues.

Requirements

• Bachelor's or higher degree in Computer Science, Information Technology, Programming, Science (Computer Studies) or related discipline.
• Familiar with TCP/IP, Data Structures, Algorithms and other protocols, and have good knowledge of operation system, network, database, computer architecture.
• Basic understanding of database theory and system architecture(index, transactions, ACID, MVCC, Raft, Sharding, CAP, High Availability) .
• Experience in at least one backend language (Python, Golang, Java etc) .
• Ability to communicate in Mandarin and English, in order to support coordination and collaboration with Mandarin-speaking stakeholders, teams, and business partners across regional markets.
• Familiar with Unix/Linux operating systems and networking is preferred.
• Experience in MySQL, Redis, MongoDB, HDFS, HBase is preferred.

Additional Information

Job Summary We are seeking a skilled and driven Database Engineer to join our infrastructure team. You will own the full lifecycle of our MySQL, PostgreSQL, Redis, MongoDB, HBase, and HDFS database systems - from architecture design and deployment to performance tuning, fault recovery, and automation tooling - ensuring mission-critical data services remain highly available, scalable, and reliable at all times.

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