Cassandra Database Administrator

Strong experience with Apache Cassandra (Open Source, DataStax, ScyllaDB).

Deep understanding of Cassandra architecture, partitions, replication, and consistency levels.

Proficiency in CQL (Cassandra Query Language) and data modeling.

Hands-on experience with Linux (Ubuntu, RHEL, CentOS).

Familiarity with Cassandra monitoring tools (DataStax OpsCenter, Prometheus, Grafana).

Experience with cloud-managed Cassandra services (AWS Keyspaces, Azure CosmosDB, Google Cloud Bigtable).

Install, configure, and upgrade Apache Cassandra (Open Source, DataStax, ScyllaDB).

Monitor cluster health, node status, and replication factors.

Ensure high availability (HA) and disaster recovery strategies are in place.

Optimize Cassandra data models, partitions, and compaction strategies.

Tune garbage collection (GC), JVM heap settings, and read/write performance.

Analyze slow queries using Cassandra Query Language (CQL) tracing.

Implement authentication (LDAP, Kerberos) and role-based access control (RBAC).

Secure Cassandra deployments with TLS/SSL encryption and firewall rules.

Ensure compliance with GDPR, HIPAA, and PCI-DSS standards.

Develop and manage backup and restore strategies using nodetool snapshots.

Test disaster recovery and failover strategies regularly.

Automate Cassandra administration tasks using Bash, Python, or Ansible.

Set up monitoring tools (Prometheus, Grafana, ELK Stack, DataStax OpsCenter).

Implement alerting for node failures, disk usage, and read/write latency.

Identify and resolve replication lag, tombstone accumulation, and query timeouts.

Work with DevOps and application teams to troubleshoot performance issues.

Maintain detailed documentation of troubleshooting procedures.

Monitor storage, memory, and CPU usage to plan for capacity scaling.

Optimize replication strategies for read/write scalability.

Implement multi-datacenter replication for disaster recovery and load

balancing.