Hybrid Mainframe PL/I Analyst–Developer

KEYES; Brussel Hoofdstad; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Company car

Mobility budget

Meal vouchers

Job summary

KEYES is seeking an Analyst Developer PL/I – Mainframe to reinforce a Mainframe development team within a large Belgian organisation. You will combine technical analysis, hands‑on development, maintenance, testing and application support on legacy PL/I applications in a IBM Mainframe environment.

You will contribute to stability, evolution and long‑term maintainability, working with cross‑functional teams and stakeholders to ensure production readiness and quality.

Qualifications

• Extensive PL/I experience in a professional Mainframe environment.
• Strong knowledge of IBM Mainframe and z/OS.
• Experience with DB2 and SQL.
• Good understanding of JCL and batch processing.
• Experience with testing and production support.

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 processing 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 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 analysts, developers, production teams and stakeholders.
• Document technical analyses, developments and fixes.
• Contribute to long‑term stability and maintainability of legacy systems.

Skills

PL/I

Mainframe

DB2

JCL

CICS

ISPF/TSO

Analytical thinking

Tools

IMS/DL/I

z/OS

SQL

CICS

Job description

KEYES is seeking an Analyst Developer PL/I – Mainframe to reinforce a Mainframe development team within a large Belgian organisation. You will combine technical analysis, hands‑on development, maintenance, testing and application support on legacy PL/I applications in a IBM Mainframe environment.

You will contribute to stability, evolution and long‑term maintainability, working with cross‑functional teams and stakeholders to ensure production readiness and quality.