Job Description: Senior Mainframe IBM Assembler (BAL) Developer – Connex Payment Systems (100% Remote)Position TitleSenior Mainframe IBM Assembler (BAL) Developer – Connex Payment SystemsLocation100% RemoteEmployment Type Full-Time / Contract (Based on Business Requirement)
Job Summary We are seeking an experienced
Senior Mainframe IBM Assembler (BAL) Developer with extensive expertise in the
Connex payment switching platform to support a critical payment processing initiative involving
Visa 0120 Automated Fuel Dispenser (AFD) transactions. This role requires deep technical knowledge of IBM Mainframe Assembler, real-time transaction processing, and payment messaging systems.
The successful candidate will work closely with client teams and Visa to implement enhancements that optimize fuel dispenser transaction processing, including pre-authorization updates, confirmation advice handling, and transaction reversals. This is a
100% remote position, offering the opportunity to contribute to a high-impact, enterprise-scale payments project.
Key ResponsibilitiesCore Development- Design, develop, modify, and optimize IBM Mainframe Assembler (BAL) code within the Connex payment switching environment.
- Enhance and maintain functionality supporting Visa 0120 Automated Fuel Dispenser (AFD) transactions.
- Ensure high-performance, scalable, and maintainable code for mission-critical payment applications.
Real-Time Transaction Processing- Implement logic enhancements to support dynamic pre-authorization amount adjustments.
- Update transaction amounts in near real-time based on fuel dispenser completion events.
- Ensure accurate transaction lifecycle processing while maintaining data integrity.
System Integration- Collaborate with internal development teams, business stakeholders, and Visa to align application enhancements with Visa 0120 Confirmation Advice messaging.
- Ensure seamless processing of payment confirmations, reversals, and exception handling across integrated systems.
- Support end-to-end payment transaction flows within the Connex environment.
Testing & Debugging- Utilize Xpediter to debug complex IBM Mainframe Assembler applications.
- Identify, troubleshoot, and resolve production and testing issues efficiently.
- Participate in unit testing, integration testing, and system validation activities to ensure application stability.
Requirements Analysis & Solution Design- Work closely with business analysts and client stakeholders to refine evolving technical requirements.
- Translate business requirements into robust technical solutions and detailed design specifications.
- Provide technical recommendations to improve system performance and maintainability.
Phased Delivery & Release Management- Support a multi-phase implementation strategy while maintaining backward compatibility.
- Ensure smooth deployments with minimal disruption to production systems.
- Participate in release planning, implementation, and post-deployment support.
Required QualificationsTechnical Skills- 15+ years of hands-on experience developing applications using IBM Mainframe Assembler (BAL).
- Extensive experience working with the Connex payment switching platform.
- Strong expertise using Xpediter for debugging and troubleshooting Mainframe Assembler applications.
- Deep understanding of financial payment processing systems and high-volume transaction environments.
- Experience with Automated Fuel Dispenser (AFD) payment workflows, including pre-authorization and transaction completion processes.
- Strong knowledge of near real-time transaction processing and payment integrity.
Professional Experience- Proven experience supporting mission-critical, high-volume payment processing applications.
- Ability to work independently in a fast-paced environment with evolving requirements.
- Strong analytical, problem-solving, and troubleshooting skills.
- Excellent communication and collaboration skills with cross-functional teams and external payment networks.
Preferred Qualifications- Experience with Visa ISO 8583 messaging standards and payment network protocols.
- Knowledge of Visa 0120 Confirmation Advice transaction processing.
- Experience supporting large-scale banking, financial services, or retail fueling payment systems.
- Familiarity with phased migration, modernization, or enterprise deployment strategies.
- Previous experience working directly with payment networks such as Visa or Client.
What We're Looking For- Self-motivated professional who can quickly contribute with minimal onboarding.
- Strong attention to detail and commitment to transaction accuracy and system reliability.
- Ability to thrive in a collaborative, distributed team environment.
- Passion for delivering high-quality solutions for enterprise payment processing systems.
Work Arrangement- 100% Remote
- Collaborate with globally distributed teams through virtual meetings and communication tools.
- Flexibility to support project milestones and deployment activities as required.
Why Join Us?- Opportunity to work on a high-impact enterprise payments modernization initiative.
- Collaborate with industry experts on mission-critical financial transaction systems.
- Fully remote work environment.
- Engage with cutting-edge payment technologies and Visa transaction processing enhancements.