Middleware Engineer
reference-number: 25222
posted: 28 August 2026
form-of-employment: Contract
apply-by: 28 September 2026
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Location: Warsaw, on-site (5 days per week from the Client's office)
Rate: 130 - 150 PLN net/h via Experis
Tasks:
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Perform the role of Middleware Engineer for an application migration initiative within a large data center migration program
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Support applications serving payment card acceptance / acquiring and issuer processor business processes
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Work within a three‑tier architecture environment and support an extensive Middleware layer critical for service migration
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Collaborate closely with the FTS Application & Middleware Team to execute BAU tasks
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Work closely with Project Managers to drive build, testing and migration activities, including preparing and placing infrastructure build, configuration or access requests and removing blockers
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Diagnose and solve technical issues
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Monitor environments for performance and reliability
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Produce and maintain high‑quality live documentation in Confluence
Requirements:
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Experience with application migrations and an understanding of challenges related to data center migration
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Knowledge of BMC Control‑M
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Knowledge of Oracle Application Express (APEX)
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Knowledge of Oracle Data Integrator 12c
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Knowledge of Oracle Internet Directory 11g / 12c
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Knowledge of Oracle Forms 11g / 12c
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Knowledge of Oracle Reports 11g / 12c
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Knowledge of Oracle Rest Data Service (ORDS)
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Knowledge of Oracle Service Bus 11g / 12c
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Knowledge of Oracle WebLogic 11g / 12c
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Strong PL/SQL skills
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Scripting skills in Perl / Powershell / Shell / Bash / Python
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Experience with Rundeck / Ansible
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Excellent communication skills in Polish and English
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Ability to work with SMEs from various countries and clearly present technical scope, challenges and solutions
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Understanding of availability, performance, monitoring and resilience for semi‑real‑time online transaction systems and mass transaction processing systems
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Understanding of infrastructure, networking, load balancing and TLS
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High responsibility, commitment to quality and delivering on obligations
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Ability to share knowledge, collaborate effectively, find compromises and build positive relationships in a local and corporate environment
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Ability to comply with the company’s office / remote work policy (currently 5 days per week in the office)
Offer:
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Multisport card
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Private healthcare
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Group life insurance
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