> Markdown version of [/jobs/ext/3470739-cobol-developer](https://www.wearedevelopers.com/jobs/ext/3470739-cobol-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). --- # COBOL Developer - **Company:** Stefanini - **Location:** Reading, PA, United States - **Experience:** Expert - **Salary:** $124,800.0 - $135,200.0 - **Contract:** Temporary to permanent - **Skills:** Batch Processing, Customer Information Control System (CICS), COBOL (Programming Language), Software Debugging, Job Control Language (JCL), Mainframes, Performance Tuning, IBM Resource Access Control Facility, Release Management, Software Engineering, Virtual Storage Access Methods, Z/OS, File-aid, Easytrieve, Data Management - **Published:** September 13, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=508017d1b9f4ccf6 ## About the Role * Strong experience developing and maintaining applications in COBOL II. * Hands-on experience with IBM z/OS mainframe environments. * Proficiency with CICS and batch processing. * Strong knowledge of JCL. * Experience working with VSAM files. * Experience with SDF II / COBOL Maps. * Experience using CEDF for CICS debugging. * Experience with File Manager, FileAid, or a similar mainframe file-management tool. * Experience with system-level debugging and performance tuning. * Knowledge of mainframe security concepts and practices. * Experience with Easytrieve. * Experience using the IBM Debugging Utility. * Strong analytical and problem-solving skills. * Excellent written and verbal communication skills. * Ability to work effectively with team members and stakeholders. Preferred Qualifications: * Experience supporting large-scale mainframe expansions or migrations. * Experience analyzing and reusing existing code across multiple machines or environments. * Familiarity with structured testing, release management, and production implementation processes. * Experience working in an agile or iterative delivery environment. Core Competencies: * Mainframe application development * COBOL programming * CICS and batch processing * Debugging and problem resolution * Performance tuning * Technical analysis * Stakeholder communication * Collaborative delivery, * COBOL Development: 5 years (Required) * IBM z/OS: 5 years (Required) * JCL: 5 years (Required) ## Description We are seeking an experienced COBOL Developer to support a mainframe modernization and expansion initiative on an IBM z/OS environment. The successful candidate will modify and enhance custom COBOL code supporting both CICS online processing and batch operations for an expanding production environment. The role will involve analyzing existing code, developing enhancements, troubleshooting issues, and supporting the deployment of changes across additional mainframe machines., * Analyze existing COBOL applications and identify code suitable for reuse across new or expanded environments. * Modify and enhance COBOL programs supporting CICS and batch processing. * Develop, test, debug, and implement mainframe application changes. * Work with JCL, VSAM files, and other IBM z/OS components. * Troubleshoot production and development issues using mainframe debugging tools. * Perform system-level debugging, performance tuning, and security-related analysis. * Support file and data management activities using File Manager or comparable tools. * Collaborate with technical teams, project stakeholders, and business representatives. * Document technical changes, testing results, and implementation procedures. * Provide strong problem-solving support throughout the development and deployment lifecycle. ## Related Videos - [Unlocking the Power of the Mainframe: Developing modern applications on z/OS](https://www.wearedevelopers.com/videos/764-unlocking-the-power-of-the-mainframe-developing-modern-applications-on-z-os) - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Cloud as the new mainframe: why the cloud hype does not reflect the dev reality](https://www.wearedevelopers.com/videos/797-cloud-as-the-new-mainframe-why-the-cloud-hype-does-not-reflect-the-dev-reality) - [Migrating from COBOL with AI: A Moonshot Demo](https://www.wearedevelopers.com/videos/1531-migrating-from-cobol-with-ai-a-moonshot-demo) - [ WeAreDevelopers LIVE - the weekly developer show with Chris Heilmann and Daniel Cranney](https://www.wearedevelopers.com/videos/1365-wearedevelopers-live-the-weekly-developer-show-with-chris-heilmann-and-daniel-cranney) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [The 10 C++ programming questions to expect in an interview](https://www.wearedevelopers.com/magazine/50-the-10-c-programming-questions-to-expect-in-an-interview) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Software Developer Salary in Switzerland [2023]](https://www.wearedevelopers.com/magazine/215-software-developer-salary-in-switzerland-2023) - [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)