Database Administrator

AVATAR MODERN TECHNO SERVICES PTE. LTD.; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

AVATAR MODERN TECHNO SERVICES PTE. LTD. is seeking a highly skilled SQL Server and PostgreSQL Database Administrator (DBA) to manage, optimize, and secure mission-critical database environments.

You will work with application, infrastructure, cloud, and business teams to ensure high availability and operational excellence. Responsibilities include managing SQL Server Always On, replication, clustering, backups, performance tuning, and PostgreSQL HA, tuning, upgrades, and security compliance.

Qualifications

• Experience administering SQL Server 2016/2019/2022.
• Experience with Always On, clustering, replication, and log shipping.
• Experience administering PostgreSQL and HA configurations.
• Backup, recovery, performance tuning, and security auditing.

Responsibilities

• Install, configure, upgrade, patch, and maintain SQL Server environments.
• Manage SQL Server Always On Availability Groups, Clustering, Log Shipping, Replication, and Failover strategies.
• Perform database backup, recovery, refresh, and cloning activities.
• Monitor database health, performance, and capacity utilization.
• Troubleshoot production issues and provide root cause analysis.
• Implement SQL Server security standards, auditing, and compliance controls.
• Install, configure, administer, and maintain PostgreSQL databases.
• Manage PostgreSQL replication, streaming replication, logical replication, and high availability solutions.
• Perform performance tuning of PostgreSQL databases, queries, indexes, and configurations.
• Execute PostgreSQL version upgrades and migrations.
• Administer PostgreSQL backup and recovery solutions.
• Monitor PostgreSQL instances and proactively identify performance bottlenecks.
• Analyze and optimize database performance.
• Identify slow-running queries and implement tuning recommendations.
• Conduct index optimization and statistics maintenance.
• Perform database growth forecasting and capacity planning.
• Ensure optimal resource utilization across database environments.
• Design, implement, and support HA/DR architectures.
• Execute disaster recovery testing and failover exercises.
• Maintain and validate backup and recovery strategies.
• Ensure compliance with defined RTO/RPO objectives.
• Implement database security best practices.
• Manage user access, roles, privileges, and authentication mechanisms.
• Support vulnerability remediation and security audits.
• Enforce encryption, password policies, and governance standards.
• Ensure compliance with organizational and regulatory requirements.
• Automate repetitive DBA activities using tools such as Ansible, PowerShell, Shell scripting, SQL scripting.
• Build automated workflows for Database provisioning, Backup validation, Health checks, Patching activities, Refresh and cloning operations, Production Support.
• Provide L3/L4 support for critical production environments.
• Participate in on-call support rotation.
• Support incident, problem, and change management processes.
• Work closely with application and infrastructure teams during outages and major incidents.

Skills

SQL Server

SQL Server Administration

Always On Availability Groups

Clustering

Replication

Backup & Recovery

Performance Tuning

Query Optimization

Security & Auditing

Windows Server

Linux

Tools

Ansible

PowerShell

Shell scripting

SQL scripting

Job description

Job Summary

We are seeking a highly skilled and experienced SQLServer & PostgreSQL Database Administrator (DBA) to manage, maintain, and optimize mission-critical database environments. The ideal candidate should possess strong expertise in Microsoft SQL Server and PostgreSQL administration, database performance tuning, high availability, disaster recovery, security compliance, and automation.

The candidate will work closely with application teams, infrastructure teams, cloud engineers, and business stakeholders to ensure database availability, reliability, and operational excellence.

Key Responsibilities

Microsoft SQL Server Administration

• Install, configure, upgrade, patch, and maintain SQLServer environments.
• Manage SQL Server Always On Availability Groups, Clustering, Log Shipping, Replication, and Failover strategies.
• Perform database backup, recovery, refresh, and cloning activities.
• Monitor database health, performance, and capacity utilization.
• Troubleshoot production issues and provide root cause analysis.
• Implement SQL Server security standards, auditing, and compliance controls.

PostgreSQL Administration

• Install, configure, administer, and maintain PostgreSQL databases.
• Manage PostgreSQL replication, streaming replication, logical replication, and high availability solutions.
• Perform performance tuning of PostgreSQL databases, queries, indexes, and configurations.
• Execute PostgreSQL version upgrades and migrations.
• Administer PostgreSQL backup and recovery solutions.
• Monitor PostgreSQL instances and proactively identify performance bottlenecks.

Performance & Capacity Management

• Analyze and optimize database performance.
• Identify slow-running queries and implement tuning recommendations.
• Conduct index optimization and statistics maintenance.
• Perform database growth forecasting and capacity planning.
• Ensure optimal resource utilization across database environments.

High Availability & Disaster Recovery

• Design, implement, and support HA/DR architectures.
• Execute disaster recovery testing and failover exercises.
• Maintain and validate backup and recovery strategies.
• Ensure compliance with defined RTO/RPO objectives.

Database Security & Compliance

• Implement database security best practices.
• Manage user access, roles, privileges, and authentication mechanisms.
• Support vulnerability remediation and security audits.
• Enforce encryption, password policies, and governance standards.
• Ensure compliance with organizational and regulatory requirements.

Automate repetitive DBA activities using tools suchas:

• Ansible
• PowerShell
• Shell scripting
• SQL scripting

Build automated workflows for:

• Database provisioning
• Backup validation
• Health checks
• Patching activities
• Refresh and cloning operations
• Production Support

General DBA Support

• Provide L3/L4 support for critical production environments.
• Participate in on-call support rotation.
• Support incident, problem, and change management processes.
• Work closely with application and infrastructure teams during outages and major incidents.

Mandatory Technical Skills

• SQL Server
• SQL Server 2016/2019/2022 Administration
• Always On Availability Groups
• Clustering
• Replication
• Backup & Recovery
• Performance Tuning
• Query Optimization
• Security & Auditing

PostgreSQL

• PostgreSQL 12/13/14/15/16 Administration
• Replication & High Availability
• Backup & Recovery
• Performance Tuning
• Query Optimization
• Extension Management
• Schema & Role Administration

Operating Systems

• Windows Server
• Linux (RHEL, CentOS, Ubuntu)

Preferred Skills

• Experience with database migrations and modernization projects.
• Experience in cloud-native database platforms.
• Knowledge of ITIL processes.
• Experience working in globally distributed support teams.
• Exposure to DevOps and CI/CD practices.
• Knowledge of database security and cybersecurity compliance frameworks.

Soft Skills

• Excellent communication and stakeholder management skills.
• Strong analytical and troubleshooting abilities.
• Ability to work under pressure in a 24x7 production environment.
• Strong documentation and presentation skills.
• Ability to mentor junior DBAs and lead technical initiatives.