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Senior Mainframe Developer

Job in Cincinnati, Hamilton County, Ohio, 45208, USA
Listing for: KellyMitchell Group
Full Time position
Listed on 2026-10-08
Job specializations:
  • Software Development
    Software Architect, Software Engineer, Senior Developer, Backend Developer
Salary/Wage Range or Industry Benchmark: 84000 - 120000 USD Yearly USD 84000.00 120000.00 YEAR
Job Description & How to Apply Below

Job Summary Our client, a leading financial and life insurance provider, is seeking a Senior Mainframe Developer to join their team. This position is W-2 only. We do not work with third-party firms or C2C arrangements for this role.

Contract Details

Type:
Full time/Direct Hire

Location:

Cincinnati, OH

Work Arrangement:
Onsite

Core Responsibilities
  • Legacy:
    Mainframe CICS, APS, IMS, VSAM and JCL
  • New:
    Mainframe COBOL w/ Micro Focus, Web UI, DB2, zOS Connect, IBM MQ Docker, GIT, Maven, Jenkins, JIRA Familiarity with JavaScript or Type Script (Angular), jQuery, AJAX, HTML, CSS;
    Java and Spring
  • Owns enterprise-level architecture for large-scale, mainframe-based business applications and establishes the technical blueprint for their continuous modernization and evolution
  • Provides technical oversight and architectural direction for a team of 15-20 software engineers delivering complex application changes and modernization initiatives
  • Ensures engineering teams consistently apply established design patterns, architecture principles, development standards, security practices, and software engineering best practices
  • Provides technical leadership and hands-on development direction for complex legacy COBOL applications supporting critical business functions, including product configuration, billing, collections, servicing, claims, and other high-volume transactional processes
  • Oversees integrations between core mainframe applications and downstream enterprise systems, including workflow, document generation, financial systems, data platforms, external services, and other enterprise applications
  • Develops and executes a modernization roadmap for large-scale mainframe applications, transitioning highly batch-oriented legacy processing toward real-time, API-enabled and digitally accessible capabilities
  • Evaluates, selects, and introduces modern technologies and architectural patterns to extend and modernize legacy platforms, including DB2 modernization, CICS transformation, web-based user interfaces, mainframe APIs, messaging, enterprise integration, and service-oriented architectures
  • Leads the evolution of legacy applications while balancing modernization, operational stability, scalability, performance, security, and total cost of ownership
  • Provides hands-on technical leadership across application architecture, software development, data engineering, system integration, discovery, data modeling, and technical solution design
  • Guides engineers through complex technical problems and actively participates in design, development, code reviews, troubleshooting, and implementation as needed
  • Manages and prioritizes product and sprint backlogs while providing technical direction to ensure timely delivery of high-value software changes
  • Establishes and continuously improves agile engineering practices, fostering a culture of accountability, innovation, continuous improvement, and high-velocity delivery
Required Skills/Experience (Must-Haves)
  • 15+ years of software engineering and technology change management experience, including 10+ years in technical leadership roles with experience communicating with senior and executive-level stakeholders
  • 7+ years of experience leading teams of COBOL/mainframe software engineers across both Agile/Scrum and traditional waterfall delivery environments
  • Extensive experience architecting, developing, modernizing, and supporting large-scale enterprise mainframe applications
  • Demonstrated ability to simplify complex technology and application modernization initiatives while minimizing long-term technical debt and total cost of ownership
  • Strong background leading modernization of legacy mainframe environments into more real-time, API-enabled, service-oriented, and web-accessible architectures
  • Strong Agile…
Position Requirements
10+ Years work experience
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