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Deloitte
Eastern Europe

Junior Developer/Trainee for Assembler - Mainframe IBM z/OS (willingness to learn Assembler) | BDS

Cracow, Poland
2026-06-18

Role Description

**Description \& Requirements** **Kogo szukamy** * 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) * **1-2 years of experience** in mainframe development, internships, or academic projects * Introductory experience or understanding of **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 international environment and international team (global) * Good command of **English and Polish** (written and spoken) * **Located in Poland** **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 **Twoja przyszła rola** * Go through the assembler training path as well as mainframe environment training path to become 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 **To oferujemy** * A budget to spend on benefits that suit you, on top of your salary. * Open colleagues, an environment that encourages proactivity, creativity, cooperation and openness. * Contribution to practice development by shaping fit-for-purpose approaches and methodologies for Deloitte clients. * Fast-paced development in a dynamic, high growth environment. * Work with Deloitte clients locally and globally, delivering high-impact solutions to complex challenges and helping them drive exceptional performance. **Ścieżka rekrutacji** * Stage 1 - Send your CV in pdf format in English. * Stage 2 - Participate in the online assessment * Stage 2 - Join an HR screening * Stage 3 - 2 interviews: technical one and on the business side

Junior Developer/Trainee for Assembler - Mainframe IBM z/OS (willingness to learn Assembler) | BDS

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