Senior IT Infrastructure Specialist SQL, Windows Server, Oracle, Java, Python Warsaw, Łódź, Gdańsk

DCG Poland; Town of Poland (NY); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Private medical care

Co-financing for the sports card

Constant support of dedicated consultant

Job summary

DCG Poland is seeking a Senior IT Infrastructure Specialist to lead and support infrastructure migration projects, focusing on SQL Server migrations and Windows Server upgrades. The ideal candidate will have extensive experience in managing large-scale infrastructure projects and providing production support.

The role involves coordinating with various teams and vendors to ensure smooth project execution while maintaining operational stability. You will be part of a team that emphasizes strong analytical and communication skills.

We offer private medical care and co-financing for sports activities.

Qualifications

• Strong experience with Windows Server administration, upgrades, and migrations.
• Proven experience in application and infrastructure lifecycle management.
• Experience providing production support in complex enterprise environments.

Responsibilities

• Lead and support infrastructure migration and upgrade initiatives across enterprise environments.
• Coordinate migration of SQL Server databases from SQL Server 2016 to SQL Server 2022.
• Support security and compliance initiatives, including vulnerability remediation and patch management.

Skills

Windows Server administration

SQL Server administration

Application lifecycle management

Incident management

Problem management

Change management

Communication skills

Analytical skills

Tools

Oracle

Java

Python

Power BI

Job description

Position: Senior IT Infrastructure Specialist

Responsibilities:

• Lead and support infrastructure migration and upgrade initiatives across enterprise environments
• Coordinate migration of SQL Server databases from SQL Server 2016 to SQL Server 2022 environments and clusters
• Support upgrade, migration, and decommissioning of Windows Server environments
• Execute and support operating system and application upgrade activities
• Coordinate vendor-led application upgrades and releases
• Collaborate with external vendors on planning, scheduling, testing, issue resolution, and deployment activities
• Ensure alignment between vendor delivery plans and internal project timelines
• Support validation, testing, and rollout of vendor-delivered solutions
• Manage application lifecycle activities, including incident management, vulnerability remediation, patch management, monitoring, and operational support
• Maintain operational stability across business-critical applications and infrastructure components
• Support application modernization, replacement, and transformation initiatives
• Participate in infrastructure and application migration projects, including SharePoint migrations, banking and compliance system migrations, and integration-related activities
• Support security and compliance initiatives, including IIQ/SSO onboarding, service account remediation, threat modelling, and security baseline implementation
• Coordinate and track migration, upgrade, release, and deployment activities
• Prepare and maintain technical documentation, HLD and SDD documentation, test plans, rollout plans, and verification materials
• Support UAT preparation, release management, and production deployments
• Contribute to backlog reduction and continuous improvement of delivery processes
• Support day-to-day operational activities and incident resolution

Requirements:

• Strong experience with Windows Server administration, upgrades, and migrations
• Strong experience with SQL Server administration, database migrations, clustering, and performance tuning
• Proven experience in application and infrastructure lifecycle management
• Hands‑on experience delivering large‑scale infrastructure migration projects, including operating system and database upgrades
• Experience providing production support in complex enterprise environments
• Strong knowledge of incident, problem, and change management processes
• Experience supporting banking or financial applications
• Experience with security and compliance activities, including vulnerability remediation, patch management, and audit support
• Experience working in integration‑heavy environments, including payment, reporting, and regulatory systems
• Strong documentation skills, including preparation of HLD, SDD, and operational documentation
• Experience coordinating testing, release, and deployment activities
• Strong analytical, troubleshooting, and problem‑solving skills
• Excellent communication and stakeholder management skills
• Very good command of English, both spoken and written

Nice to have:

• Experience with Oracle, Java, Python, Power BI, or reporting solutions
• Experience with Identity & Access Management solutions, including IIQ/SailPoint and SSO onboarding
• Familiarity with banking systems, payment platforms, KYC solutions, and compliance applications
• Experience supporting SharePoint migrations, file transfer platforms, and operational task automation
• Knowledge of regulatory requirements, audit frameworks, disaster recovery, high‑availability, and resilience concepts
• Experience working within distributed delivery models and international teams
• Experience operating in environments with high operational workload and multiple competing priorities

Offer:

• Private medical care
• Co‑financing for the sports card
• Constant support of dedicated consultant

Personal Consulting Agency (License No. 4642)