Cassandra Administrator

Who we are DigiCert is a global leader in intelligent trust. We protect the digital world by ensuring the security, privacy, and authenticity of every interaction. Our AI-powered DigiCert ONE platform unifies PKI, DNS, and certificate lifecycle management, to secure infrastructure, software, devices, messages, AI content and agents. Learn why more than 100,000 organizations, including 90% of the Fortune 500, choose DigiCert to stop today’s threats and prepare for a quantum-safe future at www.digicert.com Job summary The Apache Cassandra Administrator will collaborate with a global team of database engineers to design, automate, build, operate, and continuously enhance distributed Cassandra services supporting customer-facing SaaS platforms. Responsibilities include building highly available, scalable, and secure database solutions with strong focus on performance, resilience, monitoring, and disaster recovery in large-scale distributed environments. What you will do Design, deploy, and manage Apache Cassandra clusters across multi-datacenter environments. Build highly available, fault-tolerant distributed database architectures. Perform capacity planning, scaling, and performance tuning for Cassandra workloads. Implement replication strategies, consistency levels, and data distribution models. Optimize Cassandra data models using query-driven design principles. Monitor cluster health using tools such as Prometheus, Grafana, or Splunk. Troubleshoot node failures, latency, compaction, and data consistency issues. Develop automation using Terraform, Salt Stack, Ansible, or similar tools. Support migrations from legacy databases to Cassandra-based solutions. Collaborate with engineering teams on schema design and workload optimization. Provide on-call support and participate in rotating shifts as needed. What you will have 3+ years administering Apache Cassandra in production environments. Strong understanding of distributed systems concepts (replication, partitioning, consistency). Experience with Cassandra architecture, internals, and data modeling. Expertise in performance tuning (compaction, JVM, GC tuning). Experience managing multi-node, multi-datacenter clusters. Strong Linux systems administration knowledge. Cloud platform experience (AWS, Azure, or GCP). Strong troubleshooting and incident response skills. Nice to have Experience with DataStax Enterprise (DSE) or Astra DB. Kubernetes-based Cassandra deployments (K8ssandra, Cass Operator). Experience with CI/CD tools such as GitLab or Jenkins. Familiarity with additional databases (MariaDB, SQL Server, PostgreSQL). Benefits Generous time off policies. Top shelf benefits. Education, wellness and lifestyle support. To protect candidate information and maintain a secure hiring process, all applications must be submitted through our careers portal. Resumes or CVs sent directly via email will not be reviewed or considered. LI-SS1