About KLxKLx is the Portuguese subsidiary of Crédit Agricole S.A., a large international banking group that provides IT Skills & Software Development services to the IT organizations within the group's business lines. Our mission is to assist with the IT transformation & activities of a worldwide bank capitalizing on all the skills from our international campus in Lisbon.About ResponsibilitiesAt KLx, you'll join ourInfrastructure and IT Operations teamsupporting part of the infrastructure perimeter for our partner, Crédit Agricole Group. Working in a cluster model, the team collaborates closely withKLx's software development squads to ensure smooth integration and operational readiness.We are looking for aApplication Support Engineerto join ourMainframe systems (Z/OS )team.In this role, you'll ensure the operational stability and performance of our mainframe environments, working closely with internal teams and external partners across the Crédit Agricole Group.Your main responsibilities will be:Operational Support & Supervision ProvideLevel 2 supportforZ/OS systemsand batch applications Define, schedule, and execute batch jobs usingTWSandControl-M Monitor real-time job execution and respond to incidents (abends, SLA breaches, dependency issues)Daily Operations Launch and control production jobs (Z/OS and Control-M) Perform incident recovery and job restarts Manage system resources (disk space, JES queues, GDG, datasets) Oversee and troubleshoot file transfersContinuous Improvement & Support Provide technical support to application teams Optimize batch chains and reduce processing times Participate in production deployments and change management Handle scheduled and ad-hoc interventions outside business hours (HNO)Documentation & Reporting Draft and maintain operational procedures and runbooks Produce reports on job performance and system availabilityCollaboration & Integration Work closely with other Crédit Agricole entities Coordinate with external partners and software vendors on data exchange flows Act as a point of contact for the KLx team, ensuring smooth communication and issue escalationWho You Are Strong expertise in Z/OS system monitoring and batch processing Proficiency in JCL, ISPF, SDSF, and TSO Familiarity with CICS, DB2, IMS, and VSAM Experience with Control-M, TWS, and CFT/Connect Express Basic knowledge of DB2 (SQL, display commands, log analysis) Comfortable with Linux/Windows terminal commands and scripting Exposure to ITSM tools (ServiceNow) and monitoring platforms (Dynatrace) Understanding of ITIL v4 and Agile methodologies Experience with E-GEN or similar automation tools Rigor, team spirit and strong communication skills Proactive mindset and ability to escalate issues effectively Strong reporting capabilities Fluent in English, French is a good plusWhat We Offer: Competitive Salary + Bonus + Flex Benefits + Health Insurance; Hybrid working model, allowing you to combine onsite and offsite work; Open Space with a lovely location next to Tejo, 5 minutes' walk from Metro and Train Station, 15 minutes' drive from Humberto Delgado's airport; Canteen facilities (Breakfast + Lunch); Parking upon request (option to charge electrical cars); Free coffee, hot chocolate and fruits; Training (Hard and Soft Skills); International environment with more than 15 nationalities; A people oriented and friendly working environment.