Cassandra DBA

Zensar Technologies; Karnataka; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Zensar Technologies in India is seeking a Cassandra specialist to analyze and optimize read/write performance, tune compaction, caching, consistency levels, and SSTables across Cassandra clusters.

You will safely add, replace, remove, and decommission nodes, perform cluster expansion and capacity upgrades, manage token distribution, repair, cleanup, and rebalancing, and implement backup and point-in-time recovery strategies.

Qualifications

• Experience with nodetool, Cassandra logs, metrics, tracing, and monitoring/alerting platforms.
• Strong experience in Cassandra performance tuning and troubleshooting.

Responsibilities

• Add, replace, remove, and decommission Cassandra nodes safely.
• Perform cluster expansion and capacity upgrades with minimal production impact.
• Manage token distribution, bootstrap/streaming, repair, cleanup, and cluster rebalancing.
• Implement and maintain Cassandra backup and restore strategies.
• Perform snapshots, incremental backups, and point-in-time recovery where supported by the backup solution.
• Conduct recovery testing and support disaster-recovery procedures.
• Tune Cassandra JVM heap, garbage collection, and memory settings.
• Troubleshoot GC pauses, heap pressure, CPU, disk I/O, and memory issues.
• Tune Linux/OS and storage configurations for Cassandra workloads.
• Monitor cluster health, availability, latency, throughput, disk usage, compactions, dropped messages, GC, and repairs.
• Troubleshoot production issues including node failures, high latency, timeouts, replica inconsistencies, and capacity problems.

Skills

Cassandra

Performance tuning

Monitoring

Troubleshooting

Nodetool

Metrics & tracing

Tools

Nodetool

Cassandra logs

Monitoring platforms

Metrics tracing

Job description

Job Description

Cassandra Performance Tuning

• Analyze and optimize read/write performance and latency.
• Tune compaction, caching, consistency levels, tombstones, SSTables, and Cassandra configuration.
• Identify hot partitions, slow queries, and resource bottlenecks.

Responsibilities

Node Expansion & Cluster Management

• Add, replace, remove, and decommission Cassandra nodes safely.
• Perform cluster expansion and capacity upgrades with minimal production impact.
• Manage token distribution, bootstrap/streaming, repair, cleanup, and cluster rebalancing.

Backup & Recovery

• Implement and maintain Cassandra backup and restore strategies.
• Perform snapshots, incremental backups, and point-in-time recovery where supported by the backup solution.
• Conduct recovery testing and support disaster-recovery procedures.

JVM & System Tuning

• Tune Cassandra JVM heap, garbage collection, and memory settings.
• Troubleshoot GC pauses, heap pressure, CPU, disk I/O, and memory issues.
• Tune Linux/OS and storage configurations for Cassandra workloads.

Qualifications

Monitoring & Troubleshooting

• Monitor cluster health, availability, latency, throughput, disk usage, compactions, dropped messages, GC, and repairs.
• Troubleshoot production issues including node failures, high latency, timeouts, replica inconsistencies, and capacity problems.
• Strong experience with nodetool, Cassandra logs, metrics, tracing, and monitoring/alerting platforms.

About Us

At Zensar, we’re “experience-led everything”. We are committed to conceptualizing, designing, engineering, marketing, and managing digital solutions and experiences for over 130 leading enterprises. We are a company driven by a bold purpose: Together, we shape experiences for better futures. Whether for our clients, our people, or the world around us, this belief powers everything we do. At the heart of our culture is ONE with Client - a set of four core values that reflect who we are and how we work: One Zensar, Nurturing, Empowering, and Client Focus.

Part of the $4.8 billion RPG Group, we’re a community of 10,000+ innovators across 30+ global locations, including Milpitas, Seattle, Princeton, Cape Town, London, Zurich, Singapore, and Mexico City. Explore Life at Zensar and join us to Grow. Own. Achieve. Learn. to be the best version of yourself.

We believe the best work happens when individuality is celebrated, growth is encouraged, and well-being is prioritized. We are an equal employment opportunity (EEO) and affirmative action employer, committed to creating an inclusive workplace. All qualified applicants will be considered without regard to race, creed, color, ancestry, religion, sex, national origin, citizenship, age, sexual orientation, gender identity, disability, marital status, family medical leave status, or protected veteran status.