Cassandra Database Administrator

InTTrust is a trusted Technology and Digital Solutions provider creating value for customers, encompassing IT Consulting and Implementation services, Database Operation, Administration and Optimization services, IT Managed Services, Cloud Governance & Security services. We are experts on Digital Transformation Solutions, Custom Applications Development & Application Modernization, IoT and ML/AI solutions, Design and Implementation of Private/Public/Hybrid Cloud solutions together with Multi-Cloud Integration. We are seeking to hire a Cassandra DBA to join Data team. The ideal candidates have strong operational leadership, a service-centric mindset Cluster Management: Install, configure, and manage Cassandra clusters. Add or remove nodes, manage replication factors, and maintain maximum uptime. Performance Optimization: Analyze data access patterns, identify bottlenecks, and fine-tune JVM, garbage collection, and database configurations for scalability. Data Modeling: Work with software engineers to design efficient data models, partition keys, and write optimal CQL (Cassandra Query Language) queries Monitoring & Troubleshooting: Use monitoring tools like DataStax OpsCenter, Prometheus, and nodetool/dsetool to monitor system health and resolve production issues. Security & Backups: Implement data encryption, access controls, and establish backup/disaster recovery strategies Capacity Planning: Forecast hardware, storage, and compute requirements based on projected business growth Understanding of Cassandra internals (SSTable,meltable, compaction, repair, gossip protocol, consistent hashing) and familiarity with backup and restore strategies Automation: Automate routine operational tasks and cluster provisioning using tools like Bash, Python, or Ansible The following will be considered as a plus: Use monitoring tools like DataStax OpsCenter, Prometheus, and nodetool/dsetool to monitor system health and resolve production issues. Capacity Planning: Forecast hardware, storage, and compute requirements based on projected business growth Competitive salary package commensurate with experience. Private medical insurance plan. Company provided laptop and equipment. Access to training and development programs. Opportunities for career advancement and growth. A collaborative and supportive workplace culture. Candidates should be: Authorized to work in the EU. Proficient in Greek. InTTrust S.A. is proud to be an equal opportunities workplace and is an affirmative action employer. We are committed to equal employment opportunity regardless of age, race, colour, national origin, gender, sexual orientation, religion, disability or genetic information, or any other protected classification. We are committed to ensuring that our applicants and employees are respected, treated fairly and with dignity.