JOIN KEYES AS
Analyst Developer PL/I – Mainframe
ABOUT US
KEYES delivers integrated digital solutions through a unique ecosystem with seven areas of expertise: Infrastructure & Cloud, Cybersecurity, Data & AI, Business Software, Mainframe, Advisory and Staffing. Together, these capabilities help organisations of all sizes transform, perform and grow their responsibly.
As a trusted partner in the digital ecosystem, KEYES supports both private and public organisations in addressing their strategic challenges. We design and deliver end-to-end solutions that drive performance, agility and resilience.
At KEYES, our people collaborate across areas of expertise, contribute to impactful projects and help shape the digital future.
More information : www.keyes.eu
ABOUT THE MISSION
CONTEXT :
As part of the reinforcement of a Mainframe development team within a large Belgian organisation, we are looking for an experienced Analyst Developer PL/I to work on business-critical applications in an IBM Mainframe environment.
You will combine technical analysis, hands-on development, corrective and evolutionary maintenance, testing and application support.
You will work on legacy applications that remain central to the organisation’s operational processes and will contribute to their stability, evolution and long-term maintainability.
The role requires both strong analytical capabilities and the ability to work directly with existing PL/I applications, understand complex dependencies and implement reliable technical changes
YOUR MAIN RESPONSIBILITIES :
Perform technical analysis of existing Mainframe applications and business requirements.
Develop, modify and maintain applications written in PL/I.
Work on corrective and evolutionary maintenance of business-critical applications.
Analyse existing code, application flows and technical dependencies before implementing changes.
Develop and maintain batch and, where applicable, transactional processing.
Work with DB2 databases and embedded SQL within Mainframe applications.
Create, modify and maintain JCL jobs and batch chains.
Work with IMS / DL/I and CICS environments where applicable.
Perform unit, integration and non-regression testing.
Investigate application issues, production incidents and technical defects.
Perform troubleshooting and root cause analysis on Mainframe applications.
Analyse ABENDs, batch failures, SQL errors and application behaviour.
Support deployment and production activities.
Contribute to performance optimisation of Mainframe programs and database access.
Collaborate with functional analysts, developers, production teams and business stakeholders.
Document technical analyses, developments, fixes and application changes.
Contribute to the long-term stability and maintainability of legacy systems.