Mainframe Integration Engineer

3 weeks ago


london, United Kingdom Norton Blake Full time

Mainframe Integration Engineer We’re supporting a major digital banking programme and looking for an experienced Mainframe Integration Engineer to help modernise mission-critical payment systems. This role sits across legacy and modern stacks - linking CICS/Db2 on z/OS with Java/Spring APIs on AWS. This will be Hybrid London (two days a week, but flexible), Inside Ir35 and a long term contract. What you’ll work on :- Core Mainframe Engineering Engineering CICS transactions, Db2 stored procedures and batch flows (JCL/REXX) Working with MQ, VSAM, GDGs, copybooks and mainframe data structures IBM DataPower & API Mediation Configuring MPGW & WSP services Implementing AAA, OAuth2/JWT, MTLS, WS-Security policies Building transformations (XSLT/GatewayScript) Mainframe and Cloud Integration Integrating with AWS API Gateway / TYK Building Java/Spring Boot microservices aligned to payment services Essential experience: 12+ years with z/OS, CICS and Db2 Strong JCL, REXX, VSAM, GDG, MQ Knowledge of COBOL/Assembler (reading/debugging) Experience with CICS channels, containers, pipelines and web services Db2 performance tuning (BIND, EXPLAIN, RUNSTATS) Nice to have: Java 17+, Spring Boot AWS (Aurora PostgreSQL, API Gateway) ISO 20022, Faster Payments, BACS, CHAPS



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