Infrastructure Engineer/System Programmer

NEW assignment - Infrastructure Engineer

Infrastructure Engineer / System Programmer (z/OS)

Location: Sweden (preferred) or other Nordic countries

We’re looking for a skilled Infrastructure Engineer / System Programmer (SysProg) to join our mainframe team and help operate and modernise a highly secure, business‑critical z/OS platform.

About the role:

As part of a small, expert mainframe team, you’ll play a key role in ensuring the stability, availability, and continuous evolution of our z/OS environment. This role blends deep technical system programming with hands-on operational responsibility and close collaboration across IT and business stakeholders.

What you’ll be doing:

Perform system programming, maintenance, and optimisation of z/OS and related subsystems
Collaborate with domain owners across MQ on z/OS, IMS, and DB2 (depending on your expertise)
Manage software lifecycle activities, including installation, upgrades, and maintenance using SMP/E
Investigate incidents, perform problem management, and provide operational support
Manage certificates, encryption, and security configurations
Participate in on-call rotation and major infrastructure activities (e.g., datacentre transitions)
Drive modernisation, automation, and continuous improvement initiatives

Who you are:

Experienced in IBM z/OS system programming or a senior infrastructure role
Strong expertise in software maintenance and installation (SMP/E)
Solid understanding of mainframe security (PKI, certificates, encryption, key management)
Comfortable in 24/7 high-availability environments
Structured, proactive, and take ownership of your work
Thrive both independently and in a collaborative team setting
Curious, continuously learning, and eager to develop your technical skills
Calm, analytical, and methodical in high-pressure incident situations

Nice to have:

Experience with cross-platform integration (z/OS with distributed systems)
Background in financial services or other regulated industries
Knowledge of automation, monitoring, and alerting on mainframe platforms
Familiarity with additional z/OS subsystems or middleware

What we offer:

A key role in Sweden’s financial market infrastructure
A collaborative environment with highly skilled technical experts
Competitive benefits and flexible working conditions
Opportunities to shape and modernise critical systems

This is an interim assignment with start date as soon as possible and until the end of 2026.
#LI-DNI

Click here to access HAYS Privacy Policy, which provides detailed information on how we use and protect your personal information, and your rights in relation to this.