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Database Administrator
optiva · Dhaka, Bangladesh
About The Role
- It's fun to work in a company where people truly BELIEVE in what they're doing!
- We're committed to bringing passion and customer focus to the business.
Job Summary
We are seeking an experienced Database Administrator (DBA) to manage, maintain , and optimize MariaDB, PostgreSQL, and Cassandra database platforms. The ideal candidate will ensure high availability, performance, security, and scalability of databases supporting mission-critical applications.
Key Responsibilities
Database Administration
- Install, configure, upgrade, and maintain MariaDB, PostgreSQL, and Apache Cassandra databases
- Perform database capacity planning, performance tuning, and optimization
- Monitor database health, replication, clustering, and availability
Backup, Recovery & High Availability
- Design and manage backup and recovery strategies (logical & physical backups)
- Implement and manage replication, clustering, and failover solutions
- Perform disaster recovery planning and regular DR drills
Security & Compliance
- Manage database security: users, roles, privileges, encryption, and auditing
- Apply security patches and upgrades in compliance with company policies
- Ensure compliance with data protection and regulatory standards
Performance & Troubleshooting
- Diagnose and resolve database performance issues and outages
- Analyze slow queries, locks, and resource bottlenecks
- Provide root cause analysis (RCA) for incidents
Automation
- Automate routine DBA tasks using scripts (Shell, Python, etc.)
- Support containerized and cloud-based database deployments (if applicable)
Documentation & Support
- Maintain database documentation, SOPs, and operational runbooks
- Provide on-call support for production database environments
- Assist developers with schema design, indexing, and query optimization
Required Skills & Qualifications
Technical Skills
- Strong hands-on experience with MariaDB / MySQL , PostgreSQL , and Apache Cassandra
- Expertise in:
- Replication & clustering (Galera, PostgreSQL streaming replication, Cassandra clusters)
- Backup & recovery tools ( mysqldump , pg_dump , pg_basebackup , nodetool , etc.)
- Performance tuning and query optimization
- Experience with Linux systems and shell scripting
- Knowledge of monitoring tools (Prometheus, Grafana, Zabbix, Nagios, etc.)
Database Concepts
- ACID vs BASE principles
- OLTP and distributed database architectures
- Data modeling for relational and NoSQL databases
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