Database Administrator

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Job Summary

Database Administrator (MySQL/MariaDB, Cassandra) _ Work location - Ukraine

Role Description:

As a Database Administrator, you will be responsible for administration and support of production database systems, primarily MariaDB environments.

Main responsibilities:

• Administration and support of MariaDB Galera Cluster and Master–Slave replication
• Ensuring database availability, stability, and performance
• Backup, recovery, upgrades, and routine maintenance
• Monitoring databases using Zabbix and working together with L1/NOC engineers
• Incident analysis and participation in troubleshooting

Additional responsibilities (non-primary):

• Observing and assisting with Cassandra and Percona XtraDB Cluster
• Supporting colleagues with database-related questions and tasks

Requirements

Must have:

• 3+ years of experience as a Database Administrator
• Solid understanding of MySQL/MariaDB
• Basic to intermediate SQL knowledge and database internals expected at this level
• Experience with Linux and shell scripting
• Understanding of replication, backups, and performance basics

Nice to have:

• Hands-on experience with Galera Cluster in production environments
• Experience with database proxies (MaxScale, ProxySQL, HAProxy)
• Understanding of high availability and failover mechanisms
• Experience with performance tuning (indexes, query optimization, configuration tuning)
• Experience working with large databases and high-load systems
• Practical knowledge of backup strategies (logical vs physical, PITR)
• Experience with monitoring and alert tuning (Zabbix triggers, thresholds, false positives)
• Experience interacting with L1/L2 support teams and handling escalations
• Basic understanding of NoSQL concepts and Cassandra architecture
• Experience with Percona XtraDB Cluster is a plus
• Familiarity with Docker for running databases or related tools
• Experience with configuration management / automation tools (Ansible preferred)
• Understanding of change management and planned maintenance procedures
• Ability to participate in incident post-mortems and root cause analysis (RCA) Tech Stack (brief)
• Databases: MariaDB, MySQL, Cassandra
• Clustering & HA: Galera Cluster, Master–Slave
• Monitoring: Zabbix, Kibana/Elastic
• OS and HW: Linux, BareMetal, VMware

Working Conditions (brief)

• Remote work
• Standard working schedule
• Planned maintenance work paid as overtime
• On-call rotation