Application Operations Engineer (AppOps) – Data Center Migration

Location: Warszawa (On-site)

Work Model: Currently 5 days per week in the office

Contract

Type: B2B

Rate: 110–140 PLN/hour

About the Role

We are looking for an Application Operations Engineer (AppOps) to join a large-scale Data Center Migration program. In this role, you will support the migration and ongoing operation of business-critical applications used in payment card issuing and acquiring processes.

These systems support essential payment processing functions, including transaction authorization and high-volume transaction processing, delivered through a combination of internally developed solutions and external vendor applications.

You will work closely with application, middleware, and infrastructure teams to ensure smooth migration, stable operations, and high availability of the application environments.

Key Responsibilities

Act as Application Operations (AppOps) specialist within a data center migration project
Administer, configure, and maintain application environments supporting payment card issuing and acquiring systems
Monitor application environments to ensure availability, stability, and performance
Provide incident and problem resolution to maintain continuity of application server operations
Verify and implement changes delivered to production systems
Collaborate with project managers and technical teams during environment build, testing, and migration phases
Prepare and manage infrastructure build, configuration, and access requests
Diagnose and resolve technical issues in complex application environments
Monitor environments for performance, reliability, and resilience
Maintain high-quality operational documentation in Confluence
Work with external vendors and internal international teams

Required Technical Skills

Strong knowledge of PL/SQL or T-SQL
Scripting experience with Perl, PowerShell, Shell, Bash, or Python
Experience in application administration and support
Experience with application migrations, ideally between data centers
Understanding of high-availability and high-performance systems
Familiarity with:
- infrastructure environments
- network concepts
- load balancing
- TLS/security configurations
Experience with monitoring and troubleshooting production environments

What We Are Looking For

Experience working in application operations or migration projects
Strong problem-solving and analytical skills
Excellent communication skills in Polish and English
Ability to collaborate with international teams and SMEs across multiple countries
Understanding of availability, performance, monitoring, and resilience in online transaction systems
Strong sense of responsibility for system stability and product quality
Ability to share knowledge, collaborate effectively, and build strong relationships within global teams

Nice to Have

Experience in payment systems or financial services environments
Experience supporting large-scale transactional platforms

Benefits

Private medical care
Life insurance
Multisport card
Flexible benefits platform
Training and certification opportunities
Access to internal learning platforms
Employee referral program
Modern office environment
International work environment with global teams
Employee assistance and wellbeing programs

Application Operations Engineer (AppOps) – Data Center Migration

Experis Manpower Group