IB
Job Description
Introduction
At IBM Infrastructure & Technology, we design and run the systems that keep the world operating. Our work spans high-resiliency mainframes and hybrid cloud platforms, as well as networking, automation, and site reliability. We help deliver the performance, security, and scalability that clients and industries rely on daily. Within Infrastructure & Technology, you’ll tackle intricate challenges through curiosity and collaboration. You’ll partner with a wide range of technologies and colleagues across the globe to build resilient, future-ready solutions that support innovation. With ongoing learning, career development, and a culture that supports you, IBM enables you to grow your expertise and help shape the infrastructure driving progress.
Your Role And Responsibilities
Master's Degree
Required Technical And Professional Expertise
At IBM Infrastructure & Technology, we design and run the systems that keep the world operating. Our work spans high-resiliency mainframes and hybrid cloud platforms, as well as networking, automation, and site reliability. We help deliver the performance, security, and scalability that clients and industries rely on daily. Within Infrastructure & Technology, you’ll tackle intricate challenges through curiosity and collaboration. You’ll partner with a wide range of technologies and colleagues across the globe to build resilient, future-ready solutions that support innovation. With ongoing learning, career development, and a culture that supports you, IBM enables you to grow your expertise and help shape the infrastructure driving progress.
Your Role And Responsibilities
- Work on complex language semantics and convert them into dependable, production-quality compiler implementations.
- Experience with COBOL, with an emphasis on IBM COBOL implementations, is highly valuable.
- Candidate should be able to independently investigate language behavior, interpret detailed language specifications, make sound technical design decisions, and resolve complex problems throughout the compiler stack.
- Candidate to show technical leadership, strong ownership, and the capability to influence design and implementation decisions while collaborating effectively with other experienced engineers.
Master's Degree
Required Technical And Professional Expertise
- Strong C/C++ — production-quality systems programming
- Compiler theory and practice — must have built or significantly contributed to a real compiler, interpreter, or static analysis tool
- Lexer and parser construction — hand-written or tool-generated (e.g. ANTLR, Flex/Bison); understands grammar ambiguity and conflict resolution
- AST design and semantic analysis — symbol tables, type systems, scope resolution
- Deep practical COBOL knowledge must have written or maintained production COBOL applications
- IBM COBOL for AIX or Enterprise COBOL for z/OS — familiarity with IBM-specific extensions and compiler behaviours
- COBOL data model expertise — PIC clause semantics, COMP/COMP-3/COMP-5 variants, packed decimal arithmetic, REDEFINES, RENAMES, level-number hierarchy
- Understanding of COBOL runtime behavior — CALL linkage, PERFORM ranges, file I/O semantics
- Ability to write accurate behavioural specifications using the IBM COBOL language reference
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