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November 3, 2026
Administrator
Senior • Remote
40 - 45 PLN/yr
Warsaw, Poland
Remote work: 100% remote.
Project language: German + English.
Assignment type: B2B.
Project length: until the end of the year + possible extensions.
Start: ASAP.
Business Travels: Business trips to Germany 1-2 times a month
Workload: full time (40 hours per week).
Industry: Finance.
This role is responsible for maintaining and operating applications running on Windows and RHEL (Red Hat Enterprise Linux) infrastructure in an enterprise banking environment.
Responsibilities:
Providing technical advice to development teams and clients throughout projects, including the application design and development phases.
Developing technical solution concepts in collaboration with operations teams, architects, and the Service Design department.
Integrating applications with infrastructure and technology platforms.
Installing, configuring, and continuously monitoring applications on the systems required for their operation.
Maintaining applications across all required environments (test, integration, production, etc.) in line with client requirements.
Customizing applications to client needs in accordance with established standards and concepts.
Defining and communicating requirements for technology layers (databases, infrastructure, middleware) and developing operational standards for them.
Performing testing and supporting the rollout of new versions (release management).
Providing 2nd and 3rd Level Support, including handling tickets, analyzing and resolving errors, and addressing incidents escalated by Event Management or operating units.
Independently planning and implementing new applications and systems.
Automating operational, testing, change, and monitoring processes.
Participating in projects covering the implementation, migration, development, and maintenance of client applications.
Managing, coordinating, maintaining, and developing highly complex applications.
Serving as a subject-matter expert for banking applications.
Requirements
Expert knowledge of administering and working with Java-based applications.
Very good knowledge of Windows and RHEL operating systems.
Solid experience in application deployment, including task sequencing.
Knowledge of Oracle and PostgreSQL databases.
Experience integrating Windows and Linux applications in complex, heterogeneous IT environments.
Experience in an enterprise or banking environment.
Fluent German.
Nice to Have
Experience with deployment and automation tools: Ansible, Docker, Git.
Good command of English.
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