Senior Developer - IBM z/OS Connect

Job-ID: 395509Sector: Technology and ITLocation: Columbus, OHContract: ContractPosted: 2026-10-11Deadline: 0001-01-01Our client, a leading organization in the technology and financial services sector, is seeking a dedicated and experienced Senior Developer – IBM z/OS Connect to join their dynamic team. As a Senior Developer – IBM z/OS Connect, you will be an integral part of the mainframe modernization initiatives supporting innovative digital transformation projects. The ideal candidate will demonstrate strong problem-solving skills, effective communication, and a collaborative mindset, which will align successfully within the organization.Job Title:Senior Developer – IBM z/OS ConnectLocation:Columbus, OH or Nashville, TN (both locations require on-site presence)What's the Job?Design, develop, and deploy RESTful APIs using IBM z/OS Connect Enterprise Edition (EE). Expose mainframe assets such as CICS, IMS, COBOL, and DB2 as reusable services. Create and maintain API specifications using Swagger/OpenAPI standards. Develop and support COBOL programs and interface logic to enable API exposure. Ensure security, performance, and reliability of mainframe APIs through best practices and troubleshooting.What's Needed?7+ years of experience in z/OS mainframe development, including COBOL, JCL, and z/OS utilities. 3+ years of hands-on experience with IBM z/OS Connect Enterprise Edition. Strong understanding of RESTful API design, JSON data formats, and API lifecycle management. Experience with CICS, IMS, DB2, and mainframe security principles such as RACF and TLS/SSL. Excellent communication skills and ability to collaborate across technical teams.What's in it for me?Opportunity to work on cutting-edge mainframe modernization projects. Engagement with a forward-thinking organization committed to innovation. Collaborative environment fostering professional growth and development. Competitive on-site work environment in Columbus or Nashville. Participation in a diverse and inclusive workplace culture.Upon completion of waiting period consultants are eligible for:Medical and Prescription Drug Plans Dental Plan Vision Plan Health Savings Account Health Flexible Spending Account Dependent Care Flexible Spending Account Supplemental Life Insurance Short Term and Long Term Disability Insurance Business Travel Insurance 401(k), Plus Match Weekly PayIf this is a role that interests you and you'd like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!About ManpowerGroup, Parent Company of: Manpower, Experis, Talent Solutions, and Jefferson Wells.ManpowerGroup (NYSE: MAN), the leading global workforce solutions company, helps organizations transform in a fast-changing world of work by sourcing, assessing, developing, and managing the talent that enables them to win. We develop innovative solutions for hundreds of thousands of organizations every year, providing them with skilled talent while finding meaningful, sustainable employment for millions of people across a wide range of industries and skills. Our expert family of brands – Manpower, Experis, Talent Solutions, and Jefferson Wells – creates substantial value for candidates and clients across more than 75 countries and territories and has done so for over 70 years. We are recognized consistently for our diversity - as a best place to work for Women, Inclusion, Equality and Disability and in 2023 ManpowerGroup was named one of the World's Most Ethical Companies for the 14th year - all confirming our position as the brand of choice for in-demand talent.