Database Administrator

Minimum Requirements

Experience: At least 7 years as a Database Administrator, with hands-on expertise in PostgreSQL and MySQL environments.
Key Responsibilities

Deploy and configure PostgreSQL clusters on-premises and in AWS Aurora.
Set up and manage MySQL databases, ensuring optimal configuration and performance.
Customize database parameter groups in Aurora and MySQL to optimize performance and enable advanced features.
Define VPC, subnet, and security group configurations for secure cloud deployments.
Use tools such as pg_stat_statements, CloudWatch, pgAdmin, MySQL Workbench, and custom scripts to monitor database performance and replication status.
Tune PostgreSQL and MySQL parameters (e.g., shared_buffers, work_mem, WAL settings, buffer pool size) for optimal throughput and reliability.
Implement WAL streaming and cluster status checks for PostgreSQL; configure MySQL replication and failover strategies.
Design and execute backup strategies using native tools and AWS features (e.g., automated snapshots).
Conduct regular disaster recovery drills and maintain standby clusters for failover scenarios.
Manage user roles and permissions, enforce encryption, and monitor access logs for both PostgreSQL and MySQL.
Apply security best practices and integrate with AWS Secrets Manager for credential rotation.
Ensure compliance with organizational and regulatory standards for data protection.
Lead schema conversion and incremental data migration from on-premises to AWS Aurora and MySQL using ETL tools such as Talend and custom scripts.
Validate data integrity post-migration through row count comparisons and compatibility tests.
Develop automation scripts for data loading, monitoring, and maintenance using Shell, Python, PL/pgSQL, and MySQL scripting.
Integrate databases with CI/CD pipelines and containerized environments (e.g., ECS Fargate).
Manage clusters that process large volumes of financial transactions daily.
Model AWS costs and size resources appropriately for PostgreSQL and MySQL workloads.
Set up secure DB-to-DB communication over VPN between on-premises and AWS Aurora/MySQL.
Required Technical Skills

Database Engines: PostgreSQL (on-premises), AWS Aurora PostgreSQL, MySQL

Monitoring Tools: CloudWatch, pgAdmin, pg_stat_statements, MySQL Workbench, custom shell scripts

Security: Role management, WAL configuration, AWS Secrets Manager, MySQL user management

ETL & Migration: Talend, custom scripts, schema conversion

DevOps & Automation: Bash, Python, PL/pgSQL, MySQL scripting, AWS CLI

Cloud Services: AWS RDS, VPC, Subnets Security Groups, Aurora Serverless

Qualifications

Minimum 7 years of experience as a Database Administrator, with proven expertise in both PostgreSQL and MySQL.
Strong understanding of database performance tuning, high availability, and disaster recovery strategies.
Hands-on experience with database security, compliance, and credential management.
Experience with ETL processes, data migration, and automation scripting.
Familiarity with AWS cost modeling and resource sizing for database workloads.
Ability to work collaboratively in DevOps and agile environments