About this role
Salary: £36,000 - 60,000 per year
Requirements: Deep knowledge of CICS systems engineering and z/OS infrastructureExperience with CICS region setup, configuration, and JVM server managementStrong knowledge of IBM WebSphere Liberty administration and runtime configurationExperience managing Java workloads, including JVM tuning and performance optimisationWorking knowledge of RACF, TLS, certificates, keyrings, and security integrationExperience with REST/API enablement and modern integration practicesAbility to perform problem determination using dumps, traces, logs, and SMF dataExperience with capacity planning, resilience, HA/DR, and operational supportExperience with CI/CD pipelines, automated deployments, and release processesKnowledge of monitoring, observability, and middleware operational management Responsibilities: Support the engineering, configuration, optimisation, and support of modern Java workloads running within CICS Liberty environmentsManage CICS region setup, configuration, and JVM server operationsAdminister IBM WebSphere Liberty runtime environmentsTune JVM performance and manage Java workloadsImplement and support REST/API enablement and modern integration practicesInvestigate and resolve issues using dumps, traces, logs, and SMF dataSupport capacity planning, resilience, HA/DR, and operational stabilityWork with CI/CD pipelines, automated deployments, and release processesContribute to monitoring, observability, and middleware operational management Technologies: APICI/CDIBMIBM WebSphereSupportJVMJavaRESTSecurityWebsphereDevOps More:
We are offering a 6-12 month contract for a Mainframe Middleware Infrastructure Engineer (CICS Liberty) based in London or Edinburgh with a hybrid working model of 2-3 days onsite. This is an excellent opportunity to work on critical banking and financial services infrastructure while helping modernise core mainframe platforms with contemporary Java and API technologies. We are seeking someone to join a major enterprise transformation programme and help support our modernisation efforts.
last updated 29 week of 2026