Senior Mainframe Developer

Our client, a leading organization in the financial services industry, is seeking a Senior Mainframe Developer to join their team. As a Senior Mainframe Developer, you will be part of the IT department supporting critical payment processing systems. The ideal candidate will demonstrate strong problem-solving skills, adaptability, and a collaborative mindset, which will align successfully in the organization.

Job Title: Senior Mainframe Payments Developer (Fiserv PEP + ACH)

Location:New York, NY

Duration: 6-12 Months 

What's the Job?

• Support, maintain, and enhance Fiserv PEP applications to ensure seamless ACH transaction processing.
• Develop and implement technical and business-driven changes using COBOL, JCL, DB2, VSAM, and related mainframe technologies.
• Analyze and resolve ACH processing issues, defects, and production incidents efficiently.
• Understand end-to-end ACH payment flows, including settlement, returns, corrections, and exception processing.
• Collaborate with business and operations teams to perform root cause analysis and coordinate resolutions.

What's Needed?

• Extensive experience in Mainframe development with proficiency in COBOL, JCL, DB2, CICS, and VSAM.
• Hands-on expertise with Fiserv PEP applications and solid knowledge of ACH payments, NACHA formats, and ACH processing workflows.
• Ability to troubleshoot payment failures, processing bottlenecks, and settlement/reconciliation issues from both technical and functional perspectives.
• Strong analytical, problem-solving, and communication skills.
• Willingness to support on-site work in New York, NY, with travel covered by the organization if necessary.

What's in it for me?

• Opportunity to work on critical payment processing systems within a dynamic organization.
• Collaborate with experienced professionals in a supportive environment.
• Gain valuable experience in ACH payments and mainframe technologies.
• Participate in a role that encourages continuous learning and professional growth.
• Be part of a company committed to diversity, inclusion, and ethical practices.

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 Pay

If 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 and Talent Solutions.

Experis® is a global leader in technology services and part of the ManpowerGroup® (NYSE: MAN) family of brands. We connect skilled technology professionals with meaningful opportunities where they can grow their careers, expand their expertise and make a real impact. Guided by the belief that it takes Human Ingenuity to unlock the true potential of technology, Experis helps people gain experience with leading organizations, build sought-after skills and take the next step toward a brighter future. Backed by ManpowerGroup's 75+ years of workforce expertise and global reach across more than 70 countries and territories, Experis brings the scale, insight and opportunity to help people and businesses thrive. ManpowerGroup is consistently recognized for its commitment to inclusion, ethics and responsible business, including being named one of the World's Most Ethical Companies. Learn more at Experis.com.