AIX Developer (COBOL)
IBM · Posted Nov 3
Hybrid cloud, artificial intelligence, enterprise software, quantum computing, and IT consulting services
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About the role
IBM Infrastructure & Technology designs and operates high-resiliency mainframes, hybrid cloud platforms, networking, automation, and site reliability systems. The role involves translating complex language semantics into robust, production-quality compiler implementations, with COBOL and IBM COBOL experience valuable. The developer will investigate language behavior, interpret specifications, make technical design decisions, and solve problems across the compiler stack.
What you will do
- This role involves working with complex language semantics and translating them into robust, production-quality compiler implementations.
Skills used in this role
What the employer is looking for
- Experience with COBOL, particularly IBM COBOL implementations, is highly valuable.
- Candidate should be comfortable independently investigating language behavior , interpreting detailed language specifications, making sound technical design decisions, and solving complex problems across the compiler stack.
- Candidate to demonstrate technical leadership, strong ownership, and the ability to guide design and implementation decisions while collaborating effectively with other experienced engineers.
- 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 precise behavioural specifications from the IBM COBOL language reference
Benefits and support
- Compensation and benefits are detailed in the job posting
About IBM
International Business Machines Corporation (IBM) is a global technology and consulting company that provides hybrid cloud, artificial intelligence, and enterprise infrastructure solutions. Operating in over 175 countries, IBM helps businesses across industries modernize operations, secure data, and drive digital transformation through platforms like watsonx and Red Hat OpenShift. Founded over a century ago, the company remains a pioneer in high-performance computing, enterprise automation, and quantum technology.
- Industry
- Information Technology
- Company size
- 260,000+ employees
- Founded
- June 16, 1911
- Location
- Armonk, New York, USA
- Funding stage
- Public Company
Funding
Public Company · $3.5B raised
- ·Post Ipo Debt$150M
Leadership
Chairman, President and Chief Executive Officer
Senior Vice President and Chief Financial Officer
Senior Vice President, Software and Chief Commercial Officer
Senior Vice President, IBM Consulting
Senior Vice President, Marketing and Communications
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