Principal Database Engineer

MongoDB / Postgresql / Elastic Search (Strong experience in any 2)

Key Responsibilities

• Design, install, configure, and maintain MongoDB / Postgresql / Elastic Search on-premises clusters (replica sets, sharded clusters).
• Manage and optimize database performance, including query tuning, indexing strategies, and resource utilization.
• Implement and maintain monitoring and alerting using Grafana, Prometheus, and MongoDB Exporter.
• Configure backup and recovery mechanisms using mongodump, snapshots.
• Handle replication lag, oplog sizing, and balancer optimization in sharded clusters.
• Work closely with developers and DevOps teams to ensure database best practices in application design.
• Perform root cause analysis for database performance and stability issues.
• Implement security hardening, user management, role-based access, and TLS / SSL setup.
• Contribute to capacity planning, scalability improvements, and high availability (HA) setups.
• 3–6 years of hands-on experience with MongoDB / Postgresql / Elastic Search (Any 2) administration (v4.X – v8.X).
• Strong understanding of replication, sharding, journaling, and storage engines (WiredTiger).
• Experience with Linux system administration (Ubuntu).
• Proficient in monitoring MongoDB metrics via Grafana, Prometheus, MMS.
• Knowledge of query profiling, explain plans, and performance analysis.
• Familiarity with MongoDB backups, PITR, and disaster recovery.
• Experience in scripting and automation using Bash or Python.
• Good understanding of networking, security, and SSL / TLS configurations for database communication.
• Experience with version upgrades, patching, and migrations Knowledge of connection pooling (PgBouncer / HAProxy) and load balancing for read replicas.
• Proficiency in SQL, PL / pgSQL scripting, and Linux shell scripting.