Job Summary

We are seeking an experienced Cassandra & MongoDB Administrator responsible for managing, maintaining, and optimizing large-scale NoSQL database environments. The ideal candidate will ensure high availability, performance, security, and scalability of Cassandra and MongoDB clusters across development, test, and production environments.

Key Responsibilities

Database Administration & Operations

• Install, configure, upgrade, and manage Apache Cassandra and MongoDB database clusters
• Ensure high availability, fault tolerance, and disaster recovery across multi-node environments
• Perform routine database maintenance including patching, compaction tuning, and index management
• Manage backup, restore, and archival strategies for both Cassandra and MongoDB

Performance & Optimization

• Monitor database performance, latency, throughput, and resource utilization
• Tune Cassandra (GC, heap, compaction, read/write paths) and MongoDB (indexes, queries, sharding)
• Analyze slow queries and optimize schema designs in collaboration with application teams
• Handle capacity planning and scaling (horizontal and vertical)

High Availability & Disaster Recovery

• Manage replication, clustering, and sharding
• Configure and support multi-datacenter Cassandra clusters
• Implement MongoDB replica sets and sharded clusters
• Test and execute DR drills and recovery procedures

Monitoring & Troubleshooting

• Set up and maintain monitoring tools (Prometheus, Grafana, Ops Manager, or equivalent)
• Proactively identify issues and resolve production incidents
• Perform root cause analysis for outages and performance degradation

Security & Compliance

• Implement database security best practices including:
• • Authentication & authorization
  • Encryption at rest and in transit
  • Role-based access control (RBAC)
• Support compliance requirements and audit needs

Automation & Collaboration

• Automate routine DBA tasks using Shell, Python, or Ansible
• Work closely with DevOps, SRE, and application development teams
• Assist teams with schema design, data modeling, and query optimization
• Document operational procedures, standards, and runbooks

Required Skills & Qualifications

Technical Skills

• Strong hands-on experience with Apache Cassandra
• Strong hands-on experience with MongoDB (Replica Sets & Sharded Clusters)
• In-depth knowledge of:
• • NoSQL data modeling
  • CAP theorem concepts
  • Consistency levels and replication strategies
• Experience with Linux/Unix systems
• Proficiency in scripting (Shell, Python, or equivalent)
• Experience with backup tools, monitoring solutions, and alerting systems

Preferred Skills

• Experience with cloud platforms (Azure / AWS / GCP)
• Exposure to Kubernetes and containerized database deployments
• Knowledge of CI/CD pipelines and Infrastructure as Code (IaC)
• Understanding of streaming or big data ecosystems (Kafka, Spark – optional)

Soft Skills

• Strong problem-solving and analytical skills
• Ability to work under pressure in production environments
• Good communication skills and stakeholder collaboration
• Willingness to participate in on-call support rotations

Education

• Bachelor’s degree in Computer Science, Information Technology, or a related field (or equivalent experience)