Senior Mainframe Application Support Engineer IBM Mainframe, DB2, Red Hat, Linux Gdańsk

Diverse CG Sp. z o.o. Sp.k.; Województwo pomorskie; On-site; PLN 279,000 - 446,400; Full time

Benefits offered by this job

Private medical care

Co-financing for the sports card

Constant support of dedicated consultant

Job summary

Diverse CG Sp. z o.o. Sp.k. is seeking a professional with deep operational experience in IBM Mainframe z/OS and strong DB2 skills to join their BizDevOps Agile team. The role involves application maintenance, incident management, and collaboration with stakeholders to deliver sustainable solutions. Requirements include a solid command of hexadecimal file searching, payments processing experience, and proficiency in English. The position offers private medical care and sports card co-financing.

Qualifications

• Deep operational experience with IBM Mainframe z/OS.
• Ability to read and search files in hexadecimal format on the mainframe.
• Experience with DB2 and strong command of English.

Responsibilities

• Participate in a BizDevOps SAFe Agile team focusing on application maintenance.
• Handle incident management and ensure high-quality IT services.
• Contribute to backlog management during SAFe ceremonies.

Skills

IBM Mainframe z/OS

DB2

Hexadecimal file searching

JCL

TWS / OPC

Payments processing

SWIFT messaging

English proficiency

Tools

Red Hat Linux

Job description

As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for:

Responsibilities

• Participate in a BizDevOps SAFe Agile team, focusing on application maintenance and lifecycle management
• Deliver activities required to meet SLA objectives and ensure high‑quality IT services
• Handle incident management, problem management, and service fulfillment
• Deliver services in line with agreed scope, quality, Nordea standards, and timelines
• Take ownership of assigned parts of change initiatives, collaborating with multiple stakeholders to deliver sustainable solutions
• Contribute to backlog management during SAFe ceremonies, including refinement and planning of Agile stories supporting prioritised Epics and Features
• Improve the robustness and quality of applications to ensure a reliable, scalable, and up‑to‑date production environment
• Continuously follow best practices and latest developments within own area of expertise to ensure ongoing professional development

Requirements

• Deep operational experience with IBM Mainframe z/OS
• Strong experience with DB2, including searching and querying data
• Ability to read and search files in hexadecimal format on the mainframe
• Experience with JCL
• Experience with TWS / OPC
• Payments processing experience
• Knowledge of debit and credit transactions
• Experience with transaction and statement processing
• Knowledge of SWIFT messaging, including: MT940, MT950, camt.052 and camt.053
• Strong focus on business problems and business impact
• Systematic and structured working approach
• Very good command of English, both spoken and written

Nice to have

• Previous hands‑on experience in application maintenance
• Experience managing applications on Red Hat Linux

Offer

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

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