Mainframe Developer IBM z/OS (willingness to learn Assembler)

We are looking for a Mainframe Developer to support clients in system development, maintenance, and modernization initiatives with a focus on IBM z/OS and mainframe architecture.

• Good knowledge of IBM z/OS and mainframe concepts
• Familiarity with COBOL and/or Assembler (willingness to learn Assembler if COBOL is the primary language)
• 2-3 years of experience in mainframe development, internships, or academic projects
• Introductory experience or understanding of IBM Db2
• Awareness of debugging and performance monitoring concepts
• Basic understanding of memory management and system-level programming principles
• Ability to analyze problems and learn troubleshooting techniques
• Ability to work in an international environment and international team
• Good command of English (written and spoken), Polish at least B2 level
• Located in Poland with valid work permit

Nice to have:

• Exposure to integrating Assembler or COBOL with other technologies (e.g., PL/I or Java)
• Knowledge of any other programming languages, programming concepts
• Relevant coursework, certifications, or training in mainframe or z/OS technologies

• Go through the Assembler training path as well as mainframe environment training path to become a member of international development team
• Assist in developing, testing, and maintaining Assembler and COBOL code in mainframe environments
• Support enhancements and maintenance of existing legacy applications
• Collaborate with experienced developers and cross-functional teams on system integration tasks
• Learn to use performance monitoring and debugging tools to identify and resolve issues
• Participate in incident analysis and problem resolution under guidance from senior team members
• Take part in system modernization initiatives and gain exposure to new mainframe technologies
• Continuously build technical skills through mentorship, training, and hands-on experience

Located in Poland with valid work permit required