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