Mainframe Migration Engineer working on modernization projects for German client. Analyzing codebases and supporting transitions to modern architectures in a remote role based in Portugal.
Responsibilities
Join a high-impact Mainframe Modernization project for a major enterprise client in Germany
Migration of large-scale legacy Mainframe systems for a leading German enterprise
Analyzing and refactoring existing COBOL and Assembly codebases
Supporting the transition to Java-based modern architectures
Operating across hybrid environments where legacy and modern systems coexist during the migration window
Active migration engineering with real complexity, tight timelines, and collaboration with international teams across Portugal and Germany
Requirements
Mid to Senior level — 5+ years of experience in software engineering with direct involvement in Mainframe environments
Strong hands-on experience with at least two of the following: COBOL, Java, Assembly — depth in all three is a significant differentiator
Proven experience in Mainframe migration or modernization projects — you understand the complexity of migrating business-critical legacy systems, not just reading the code
Ability to analyze, document, and modernize existing legacy codebases — including understanding undocumented or poorly documented systems
Comfortable operating in hybrid environments where Mainframe and modern stacks coexist
Strong problem-solving skills in complex, low-tolerance-for-error contexts
Able to onboard fast and contribute immediately — this project requires minimal ramp-up time
English B2+ — working language for collaboration with international teams and German client stakeholders
Willingness to travel to Porto approximately once a month when project needs require it
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