Senior Mainframe Engineer
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Before you apply
LocationPoland
Work modehybrid
Typefull-time
SenioritySenior
Company size10,000+ people
First seenNov 3, 2026 · 4d ago
Verified live21h ago
At a glanceSummarised by Seekless from the posting.
Strong hands-on experience with IBM Z mainframe hardware and z/OS infrastructure
Proven expertise in IODF creation and maintenance, CHPID configuration, and I/O connectivity
Strong knowledge of z/OS Communications Server and TCP/IP configuration and troubleshooting
Good understanding of mainframe network architecture, including OSA adapters, network interfaces, routing, and connectivity
Strong troubleshooting skills for hardware, I/O, and network-related incidents in a highly available mainframe environment
Strong collaboration and communication abilities
Analytical and methodical mindset for troubleshooting complex hardware and network issues
Clear written and verbal communication in English
Commitment to documentation and knowledge sharing
Experience with IBM Z hardware migration, installation, upgrade, or datacenter migration activities
Experience with the installation and customization of CFT, Connect Express, and Connect Direct
Knowledge of Parallel Sysplex, coupling connectivity, HMC, Support Element, and mainframe hardware management concepts
Knowledge of VTAM, SNA, Enterprise Extender, or related z/OS networking technologies
Knowledge of scripting and automation languages such as REXX
Flexibility to work outside standard business hours and participate in on-call rotations
Skills
IBM Z
z/OS
IODF
CHPID
TCP/IP
OSA
VTAM
SNA
Enterprise Extender
REXX
CFT
Connect Express
Connect Direct
HMC
Parallel Sysplex
Division: Group Technology Services
About the role
As a Mainframe Hardware & Network Engineer, you will play a crucial role in ensuring the availability, connectivity, performance, and resilience of our z/OS infrastructure.
Role Overview
As a Mainframe Hardware & Network Engineer, you will play a key role in managing, maintaining, and evolving the hardware and network infrastructure supporting our z/OS environment.
Responsibilities
Your responsibilities will include:
•
Managing and maintaining mainframe hardware and connectivity configurations, including CHPID, channel paths, and I/O definitions.
2.
Creating, maintaining, and deploying IODF configurations.
3.
Managing and troubleshooting TCP/IP configurations and network connectivity within the z/OS environment.
4.
Managing processor resources: CP, zIIP, IFL, memory and capacity.
5.
Planning and implementing hardware and network changes while ensuring high availability, resilience, and minimal production impact.
6.
Collaborating with Mainframe, Storage, Security, and other cross-functional IT teams.
Mandatory Technical Requirements:
•
Strong hands-on experience with IBM Z mainframe hardware and z/OS infrastructure.
2.
Proven expertise in IODF creation and maintenance, CHPID configuration, and I/O connectivity.
3.
Strong knowledge of z/OS Communications Server and TCP/IP configuration and troubleshooting.
4.
Good understanding of mainframe network architecture, including OSA adapters, network interfaces, routing, and connectivity.
5.
Strong troubleshooting skills for hardware, I/O, and network-related incidents in a highly available mainframe environment.
Nice-to-Have Skills
•
Experience with IBM Z hardware migration, installation, upgrade, or datacenter migration activities.
•
Experience with the installation and customization of CFT, Connect Express, and Connect Direct would be highly appreciated.
2.
Knowledge of Parallel Sysplex, coupling connectivity, HMC, Support Element, and mainframe hardware management concepts.
3.
Knowledge of VTAM, SNA, Enterprise Extender, or related z/OS networking technologies.
4.
Knowledge of scripting and automation languages such as REXX.
Soft Skills
•
Strong collaboration and communication abilities.
2.
Analytical and methodical mindset for troubleshooting complex hardware and network issues.
3.
Clear written and verbal communication in English.
4.
Commitment to documentation and knowledge sharing.
Availability
Please note that flexibility to work outside standard business hours is required. Production launches and major hardware or network changes typically occur after 17:00 or on Saturdays, and participation in on-call rotations during nights and weekends is expected.
Please note that this is a permanent position, and we do not offer freelance/contract arrangement for the role.
Why join us
About the company
Embark on your new adventure at Euroclear, and work at the heart of the global capital markets. We connect over 2,000 financial institutions across the globe. As an open and resilient infrastructure, we contribute to the stability of the financial markets. We help clients cut through complexity, lower costs, and mitigate risks of financial transactions. At Euroclear, we have the clear ambition to use our key role to facilitate and accelerate a sustainable global financial system.
What We Offer:
•
Work closely with inspiring, supportive and engaged colleagues from more than 80 different countries.
•
Practice your talents in a highly professional international environment.
•
Join a learning and development environment with an emphasis on knowledge sharing and training.
•
Competitive salary and comprehensive benefits.
Ways of working
Find your own optimal balance within our hybrid working model, where you can connect at the office 8 days a month and also benefit from remote working.
Great Place to Work for All
Legal
We are committed to creating an inclusive culture that celebrates diversity and strives to be a Great Place to Work for All. All qualified applicants will be considered for employment, regardless of any aspect that makes them unique (including race, religion, national origin, gender, sexual orientation, age, marital status, pregnancy, disability, …). If you need any specific accommodation due to disability or any other reason, you can let the recruiter know during your application process. Our values guide how we work together and shape our future: Our mission and values - Euroclear