Mainframe Developer

Calling all innovators – find your future at Fiserv.

We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Mainframe Developer

Job Posting Title: Senior Developer, Software Development Engineering 

Role Summary 

As a Senior Mainframe Developer at Fiserv, you will contribute to the development, enhancement, testing, and support of mainframe applications. You will work closely with Leads, business partners, compliance teams and interfacing applications to understand requirements, translate them into technical specifications, and deliver reliable solutions. The role is suited for a mid-level mainframe professional with 5+ years of hands-on experience in COBOL, JCL, VSAM, CICS, DB2, and IDMS, with a strong focus on code quality, production stability, and continuous improvement. 

What you will do 

• Develop, test, maintain, and support mainframe applications using COBOL, JCL, VSAM, CICS, IDMS and DB2. 

• Participate in requirement discussions, Design Review with business, compliance, and interfacing application teams; convert requirements into clear technical specifications. 

• Design, code, unit test, and implement application changes under established development and release processes by following the standards.

• Prepare and execute unit and regression test scenarios to validate functionality, code quality, and reliability. 

• Troubleshoot, debug, and resolve technical issues across batch and online mainframe components. 
• Analyze and resolve production abends and incidents within defined SLAs, while ensuring appropriate documentation and follow-up actions. 

• Support application performance improvements by identifying inefficient code and opportunities for resource optimization. 

• Participate in code reviews, incorporate feedback, and follow coding standards, secure coding guidelines, and best practices. 

• Contribute to knowledge sharing, documentation, and onboarding support for junior developers when required. 

• Stay current with relevant mainframe practices, tools, and process improvements that enhance delivery quality and operational stability. 

What you will need to have 

• Bachelor’s degree in computer science, Information Technology, or a related field, or equivalent practical experience. 

• 5+ years of hands-on experience in mainframe development using COBOL, JCL, VSAM, CICS, IDMS and DB2. 

• 5+ years of experience using mainframe utilities and tools for application development, testing, and maintenance. 

• 2+ years of experience in requirement analysis and creating technical specifications for mainframe changes. 

• 2+ years of experience in designing, coding, unit testing, and implementing mainframe application changes. 

• Good understanding of batch processing, online transactions, file handling, DB2 concepts, and production support processes. 
• Exposure to mainframe scheduling, version control, debugging, and deployment tools. 

• Strong analytical, troubleshooting, and problem-solving skills with attention to quality and accuracy. 

• Good written and verbal communication skills, with the ability to collaborate effectively across teams. 

What would be great to have 

• Experience in Payments Domain, Cards Processing 

• Working knowledge of end-to-end software delivery lifecycle activities such as code, test, deploy, and post-implementation support. 

• Experience presenting technical options, analysis, and implementation updates to stakeholders or project teams. 

• Ability to work independently on assigned modules while collaborating with senior developers and cross-functional teams. 

Experience Level: Mid-level / Senior Developer – 5+ years of relevant mainframe experience 

Thank you for considering employment with Fiserv.  Please:

• Apply using your legal name
• Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

Our commitment to Diversity and Inclusion:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law. 

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

Warning about fake job posts:

Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.