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# Senior Mainframe Developer

- **Company:** Intercontinental Exchange
- **Location:** Jacksonville, FL, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Java (Programming Language), Microsoft Excel, Customer Information Control System (CICS), COBOL (Programming Language), Information Systems, IBM DB2, Programming Tools, Job Control Language (JCL), IBM Rational Software, Rexx (Programming Language), Mainframes, Microsoft Office, Microsoft Visio, Microsoft PowerPoint, Release Management, Software Engineering, Virtual Storage Access Methods, Z/OS, Tso/ispf, Flexi (Photoshop Plugin), Claude Code, File-aid, Information Technology
- **Published:** October 4, 2026
- **Apply:** https://dejobs.org/x/x/2893D21CF79949D287834C94EA19F3E4/job/

## About the Role

* Bachelor's degree in computer science, Information Systems, or the equivalent combination of education, training, or work experience.
 * 8+ years z/OS mainframe application development technologies such as Batch/CICS COBOL, JCL, IDz, ISPW, REXX, TSO; Java/Java plug-ins, Assembler, C* are a plus.
 * Excellent analytical, decision-making, and problem-solving skills - ability to foresee problems, identify/implement solutions that are reliable, scalable, and efficient where applicable.
 * Excellent leadership skills (defined as the ability to influence or induce others in a direction, course, action, or opinion to produce positive results for the organization or a client).
 * Ability to communicate well with technical and non-technical audiences.
 * Knowledge with AI-assisted development tools, particularly with Claude Code knowledge/ experience is considered a strong plus
 * Results oriented, business focused, and successful at interfacing across multiple organizational units.
 * Self-motivated, proactive, and able to work independently with little guidance or formal training.
 * Ability to identify opportunities to create, improve or enhance tools and processes to improve productivity and help minimize Production risk.
 * Performs well under pressure/time constraints.
 * Adaptable, Approachable, able to give/take direction.
 * Continual learner.
 * Mortgage/MSP knowledge and understanding of FM a plus.
 * Familiarity with FM/MSP production job flows and processes.

Technologies

 * COBOL for Z/OS, CICS, IDz, (C*, Assembler, JCL, REXX a plus).
 * VSAM/DB2 file structures, ISPW source code/release management
 * TSO/ISPF mainframe interfaces
 * Utilities (IDCAMS, FILEAID, XPEDITER, QUIKJOB, LIBRARIAN, RDZ - Rational Suite)
 * MS Office (WORD, EXCEL, PowerPoint, Visio)

## Description

The MSP development community is the heart of MSP Mortgage Technology. Our focus is to enhance, maintain, and support both internal and client-facing MSP functionality through efficiencies, and associated processes that drive improvements which grow, protect and preserve the integrity of MSP for our clients., The Senior Software Engineer is a core contributor to the MSP development team, responsible for the design, development, and ongoing support of mainframe-based mortgage servicing solutions. This role leads technically on projects of appropriate scope, delivers quality COBOL/CICS solutions aligned with business requirements and architectural standards, and actively contributes to the growth and capability of the broader engineering team., * Interpret, write new, and/or modify existing COBOL Batch and CICS programs timely and efficiently according to business requirements and documented standards

 * Familiarity with in-house source-code tools, development tools, development, testing, and implementation processes and procedures.
 * Able to collaborate with peers, teams, and departments successfully and respectfully.
 * Able to research, analyze, strategize, formulate, problem-solve, and implement coding solutions within expected timelines.
 * Serves as technical lead, architect, or principal developer on projects of appropriate scope and complexity.
 * Provides and guides production support for in-production applications, including participation in the secondary on-call rotation.
 * Mentors and guides less experienced developers, contributing to team growth and knowledge transfer.
 * Participates in a secondary on-call schedule to support production operations outside of business hours.
 * Perform other related duties as assigned.