Senior MSSQL & MongoDB DBA - 24/7 Production Support

BLAZECORP PTE. LTD.; Dublin; On-site; EUR 61,000 - 94,000; Full time

Job summary

A hands-on Database Administrator role focusing on MSSQL and MongoDB in a production environment supporting 24/7 operations. You will ensure high availability, performance tuning, and disaster recovery readiness, while managing Always On and replica sets and conducting regular health checks.

The role requires 5-8+ years of DBA experience, strong incident response skills, and the ability to work in a security-conscious government-context environment.

Qualifications

• 5-8+ years of DBA experience.
• Strong hands-on experience with Microsoft SQL Server (Always On, HA, performance tuning) and MongoDB (Replica Sets, Backup/Restore).
• Experience supporting 24/7 mission-critical systems and Severity 1 incidents.
• Experience supporting application deployment (data patching, data seeding, etc.).
• Strong troubleshooting and analytical skills.
• Calm and decisive during major incidents; strong communication during incident bridge calls.
• Eligible for Government security clearance.

Responsibilities

• Provide L2/L3 support for MSSQL and MongoDB in Production and DR environments; participate in standby/on-call roster for critical incidents
• Troubleshoot and resolve database outages, Always On failover issues, blocking/deadlocks, performance bottlenecks, and storage/IOPS constraints
• Perform root cause analysis and implement preventive measures
• Manage MSSQL Always On Availability Groups; monitor replication/failover health; perform patching and cumulative updates; maintain backup/restore strategy; conduct DR drills; optimize indexing and execution plans
• Manage MongoDB Replica Sets and automatic failover; monitor memory, disk, and index performance; manage backup/restore and recovery validation; maintain cluster health and sharding
• Conduct proactive health checks, analyze query execution plans and slow queries, perform tuning and optimization, and forecast capacity growth
• Review database scripts prior to production deployment; support data migration and release windows; validate stability post-deployment; ensure rollback/recovery procedures are in place
• Implement database security hardening, manage role-based access control and auditing/logging, support vulnerability assessment remediation, and ensure compliance with government security policies

Skills

DBA experience

Troubleshooting

Incident management

Communication

Security clearance eligibility

Tools

Microsoft SQL Server

MongoDB

Job description

A hands-on Database Administrator role focusing on MSSQL and MongoDB in a production environment supporting 24/7 operations. You will ensure high availability, performance tuning, and disaster recovery readiness, while managing Always On and replica sets and conducting regular health checks.

The role requires 5-8+ years of DBA experience, strong incident response skills, and the ability to work in a security-conscious government-context environment.