Senior Database Platform Engineer — Multi-DB Migrations

Dnb; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Dun & Bradstreet in Warszawa seeks an experienced Database Administrator to manage a diverse estate (Oracle, SQL Server, PostgreSQL, MySQL, MongoDB) ensuring performance, security, and availability.

You will split time between operations and migration projects, using Ansible, Splunk, and monitoring tools, with a security-first, ITIL-aligned approach and opportunities to influence resilient data platforms.

Qualifications

• 3-5+ years hands-on database administration across at least two of: Oracle, SQL Server, PostgreSQL, MySQL, MongoDB.
• Solid SQL skills and real experience with performance tuning, backup/recovery and high availability.
• Exposure to heterogeneous database migrations (Oracle to PostgreSQL/SQL Server is a big plus).
• Comfort in virtualised environments (VMware/vSphere, GCP/GCVE/AWS) and mixed Linux/Windows hosting.
• Working knowledge of ServiceNow and/or Jira, and ITIL processes (incident, change, problem).
• Scripting and automation instincts (Ansible, PowerShell, shell, Python).
• Fluent English; other European languages welcome.
• An ownership mindset, curious, proactive, and a genuine team player.

Responsibilities

• Administer, tune and support production and non-production databases across Oracle, MS SQL Server, PostgreSQL, MySQL and MongoDB.
• Handle incidents, service requests, change requests and vulnerability remediation through ServiceNow, following ITIL practice.
• Build and improve monitoring and observability using Splunk, Zabbix and OpenTelemetry-based database metrics.
• Automate the boring stuff, patching and provisioning via Ansible, GitHub and NinjaOne.
• Work security-first: Imperva, Nessus, CyberArk, and alignment with ISO 27001, SOX, CIS and GDPR controls.

Skills

Database admin

SQL proficiency

Performance tuning

Migration experience

Virtualised environments

ITIL / ServiceNow

Scripting & automation

English fluent

Tools

ServiceNow

Jira

Ansible

PowerShell

Python

VMware

Job description

Dun & Bradstreet in Warszawa seeks an experienced Database Administrator to manage a diverse estate (Oracle, SQL Server, PostgreSQL, MySQL, MongoDB) ensuring performance, security, and availability.

You will split time between operations and migration projects, using Ansible, Splunk, and monitoring tools, with a security-first, ITIL-aligned approach and opportunities to influence resilient data platforms.