Full-time

Senior Cobol Developer with Mainframe z/OS (willingness to learn Assembler) | Deloitte | Poland

Posted by Deloitte • Wrocław, Lower Silesian Voivodeship, Poland

📍 Wrocław, Lower Silesian Voivodeship 🕒 February 19, 2026

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About the Role

Description
 & Requirements Who we are looking for We are looking for an experienced Assembler Developer with strong expertise in Mainframe z/OS knowledge to support our clients in system development, maintenance, and modernization initiatives. The ideal candidate will possess a thorough understanding of IBM z/OS, mainframe architecture, and related technologies.Proficient in Assembler/Cobol programming and mainframe environments, including IBM z/OS (willingness to learn Assembler if Cobol is your main programming language)
Minimum of 4–5 years’ experience in Assembler/Cobol development, with at least 3 years working on mainframe systems
Hands-on experience with DB2
Experienced with performance and debugging tools
Strong understanding of memory management and system-level programming concepts
Proven ability to troubleshoot and resolve complex production issues effectively
Excellent command of English 

            

Job Details

Location Wrocław, Lower Silesian Voivodeship
Job Type Full-time
Category Computer Occupations
Posted February 19, 2026
Deadline March 31, 2026

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