> Markdown version of [/jobs/ext/3845918-mainframe-developer](https://www.wearedevelopers.com/jobs/ext/3845918-mainframe-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mainframe Developer - **Company:** Skillbase Group Ltd - **Location:** Antwerp, NY, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Applications Architecture, Unit Testing, Batch Processing, Software Bug Management, Customer Information Control System (CICS), COBOL (Programming Language), IBM Mainframe, Z/OS, Information Technology - **Published:** October 20, 2026 - **Apply:** https://portal.skillbasegroup.com/candidate/contactVac.asp?vacID=3036 ## About the Role * 5+ years of COBOL (V5) development * Strong experience with IBM Mainframe (z/OS) * VSAM, * JCL, and batch processing * SDSF * Solid understanding of application architecture and reusable components Nice to Have * CICS * RDZ * Experience in insurance domain Profile Solution-oriented with strong attention to detailProactive, hands-on, and accountableStrong communication and teamwork skills Languages * Dutch * English ## Description Analyse requirements and translate them into high-quality technical solutionsDevelop and maintain applications on an IBM z/OS mainframePerform component testing, bug fixing, and production supportCollaborate closely within an agile team environmentContribute to continuous improvement and best practicesDocument developed solutions and technical components