[Hiring] MongoDB Senior Administrator @LTM

Role Description

MongoDB DBA is responsible for deploying, managing, and optimizing MongoDB databases on Oracle Linux systems, ensuring high availability, performance, and security across on-prem and cloud environments.

Key Responsibilities

• Install, configure, and maintain MongoDB databases on Oracle Linux servers including OS-level kernel tuning, THP, system limits, and readahead.
• Deploy, manage, and scale MongoDB clusters including replication topologies, replica sets, and sharded clusters.
• Perform database upgrades, patching, rolling updates, and major version migrations with minimal downtime.
• Monitor database performance and optimize queries, execution plans, explain indexes, single, compound, partial, TTL, and JSON/BSON schema designs.
• Implement backup and recovery strategies using mongodump, mongorestore, Ops Manager, continuous backups, point-in-time recovery (PITR), and storage snapshots.
• Configure and tune MongoDB replication for high availability, automatic failover, and disaster recovery including managing priorities, hidden/delayed nodes, and arbiters.
• Manage large-scale data distribution using sharding including shard key selection, cluster balancing, and zone sharding for data localization.
• Ensure database security including authentication (LDAP/x509), authorization (RBAC), TLS/SSL encryption in transit, and WiredTiger encryption at rest.
• Automate routine DBA tasks, deployment workflows, and health checks using Shell/Python scripting and configuration management tools.
• Monitor systems internal metrics, WiredTiger tickets, cache utilization, and cluster health using MongoDB Ops Manager, Cloud Manager, or native utilities (mongostat/mongotop).
• Troubleshoot complex production issues, performance bottlenecks, and lock contention to perform thorough root cause analysis (RCA).
• Work closely with application teams for performance tuning, aggregation framework optimization, and schema design best practices.
• Manage MongoDB deployments in cloud environments like Amazon Web Services (EC2/Atlas) and integrate with cloud infrastructure.
• Implement logging, database auditing, log redaction, and compliance standards to meet organizational security policies.
• Perform capacity planning, storage management, index rebuilds, and disk space reclamation to prevent fragmentation.
• Support database migrations across diverse environments (on-premise to cloud, cluster to cluster, or database engine migrations).
• Provide 24x7 production support in an on-call rotation and handle real-time disaster recovery (DR) events.
• Maintain detailed documentation for infrastructure configurations, runbooks, security baselines, and disaster recovery procedures.
• Stay updated with new MongoDB features and remain willing to cross-skill across other database technologies (e.g., Relational or NoSQL).

Qualifications

• Strong experience in MongoDB administration.
• Hands-on with Oracle Linux/Unix systems.
• Knowledge of replica sets, sharding, and indexing.
• Experience with backup/recovery and performance tuning.
• Familiarity with cloud platforms (AWS, MongoDB Atlas).