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Posted 4 months ago

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Senior Database Administrator (Freelancer)

MumbaiRemoteFull-time

AI Summary

Senior Database Administrator to lead and support Amazon Aurora PostgreSQL environments, focusing on Oracle to PostgreSQL migration, performance tuning, security, DMS tasks, and post-go-live stabilization.

About this role

Mactores is a trusted leader among businesses in providing modern data platform solutions. Since 2008, Mactores have been enabling businesses to accelerate their value through automation by providing End-to-End Data Solutions that are automated, agile, and secure. We collaborate with customers to strategize, navigate, and accelerate an ideal path forward with a digital transformation via assessments, migration, or modernization.

We are looking for an experienced Senior Database Administrator to lead and support Amazon Aurora PostgreSQL environments as part of an Oracle to PostgreSQL migration program. The role requires deep hands-on expertise in database administration, AWS DMS, performance tuning, security, and post–go-live stabilization in production environments.

What you will do?

  • Design, set up, configure, and manage Amazon Aurora PostgreSQL clusters.
  • Configure parameters, maintenance windows, monitoring, and scaling strategies.
  • Ensure high availability, fault tolerance, and operational readiness.
  • Perform user, role, and privilege mapping from Oracle to PostgreSQL.
  • Implement least-privilege access, role hierarchies, and security best practices.
  • Support audit and compliance requirements.
  • Configure, run, monitor, and optimize AWS DMS tasks (Full Load and CDC).
  • Troubleshoot DMS latency, data mismatches, and performance issues.
  • Tune DMS settings for large-volume and high-throughput workloads.
  • Perform server and database performance tuning (CPU, memory, I/O, connections).
  • Tune PostgreSQL parameters, autovacuum, indexing, and query behavior.
  • Proactively identify and resolve performance bottlenecks.
  • Design and implement backup and restore strategies.
  • Define and test disaster recovery (DR) and failover procedures.
  • Support cross-region replication and recovery drills.
  • Lead post–go-live stabilization activities.
  • Monitor production workloads and resolve incidents.
  • Act as L3 escalation point for database-related production issues.
  • Provide operational documentation and handover support.

    • What are we looking for?

  • 5+ years of experience administering Amazon Aurora PostgreSQL
  • Proven expertise in Oracle to PostgreSQL migration support
  • Hands-on experience with AWS DMS
  • Advanced PostgreSQL performance tuning and troubleshooting skills
  • Strong knowledge of backup, restore, and DR planning in AWS
  • Experience with AWS monitoring tools (CloudWatch, Performance Insights)
  • Strong problem-solving and root-cause analysis abilities
  • Experience working in production and post–go-live environments
  • Ability to work independently as an L3 escalation engineer
  • Clear communication and documentation skills|

    • You will be preferred if

  • Familiarity with automation and configuration management tools, such as Ansible, Chef, or Puppet
  • Familiarity with IAAC tools such as Terraform, CloudFormation
  • Familiarity with CI/CD implementation tools like Liquibase/Flyway
  • AWS Certified Database – Specialty
  • AWS Certified Solutions Architect

    • Skills

    Amazon Aurora PostgreSQLAudit And ComplianceAutovacuumAWS DMSCloudWatchCross-region ReplicationDatabase Backup And RestoreDisaster Recovery PlanningDocumentationIndexingL3 Escalation SupportLeast-privilege AccessLMS For PrivilegesMonitoring And Incident ResolutionOracle To PostgreSQL MigrationPerformance InsightsPostgreSQL Performance TuningQuery OptimizationSecurity Best PracticesSQL Tuning

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