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Mainframe Assembler Developer || Onsite – Omaha, NE || Contract

Mainframe Assembler Developer || Onsite – Omaha, NE || Contract

AcestackOmaha, NE, United States
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Job Title : Mainframe Assembler Developer Credit Card Authorization

Location : Onsite Omaha, NE

Long-Term Contract (W2 / C2C)

Locals - Preferred.

Job Description :

We are seeking a highly skilled Mainframe Assembler Developer with strong experience in the Credit Card Authorization domain to join our client's core processing team in Omaha, NC . The ideal candidate will possess a solid background in Assembler , COBOL , JCL , and CICS , with a focus on transaction-heavy, high-performance systems.

Key Responsibilities :

  • Develop and maintain mission-critical applications using Assembler (HLASM) on IBM mainframes.
  • Enhance and support Credit Card Authorization systems, ensuring high availability and performance.
  • Collaborate with cross-functional teams for system design, analysis, and performance tuning.
  • Write and optimize complex COBOL programs and JCL scripts for batch processing.
  • Design and maintain CICS transactions and online programs for card authorization services.
  • Troubleshoot issues and resolve production incidents with minimal downtime.
  • Ensure compliance with security, audit, and regulatory requirements related to card transactions.

Required Skills :

  • 7+ years of experience in Mainframe development
  • Strong hands-on experience in Assembler (HLASM) programming
  • Proficiency in COBOL , JCL , and CICS
  • Solid understanding of Credit Card Authorization , transaction routing, and host systems
  • Experience working in high-volume, real-time payment environments
  • Familiarity with debugging tools like Expeditor , File-Aid , etc.
  • Ability to work independently and meet tight deadlines in a production environment

    • Nice to Have :

  • Experience with IBM MQ , DB2 , or VSAM
  • Exposure to PCI compliance and card network integrations (Visa, MasterCard, etc.)
  • Prior experience in financial services or payment processing platforms

    • To Apply : Please share resume to Sanghab@acestackllc.com & anamikav@acestackllc.com

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    Mainframe Developer • Omaha, NE, United States