Software Engineer III: Backend C#

Jack Henry, provides advanced bill payment and money transfer solutions to banks and credit unions. We offer modernized smart technology, including AI driven, security, cloud-based software, and fraud monitor, to deliver engaging payment solutions to customers. Our solutions help financial institutions to meet the payment expectations of today and the payment innovation needs of tomorrow. Payments become smarter, engaging, and predictive with Payrailz.

We are looking for a software engineer who combines strong backend development expertise with a passion for cloud technologies, distributed systems, and modern engineering practices. The ideal candidate is comfortable designing scalable event-driven solutions, solving complex technical problems, and taking ownership of systems that require both innovation and operational excellence.

We are seeking an experienced Software Engineer - C#/.NET Backend Developer to join our Payment Processing team in a full-time, fully remote capacity. In this role, you will design, develop, and support high-performance, cloud-native backend services, APIs, and large-scale batch processing solutions that power critical payment transactions.

You will play a key role in modernizing and scaling our payment platform using AWS cloud technologies, event-driven architecture, distributed systems, and AI-assisted development practices, while stabilizing and scaling existing payment processing platform.

This position may be worked remotely within the United States, with the exception of California.

This position is ineligible for immigration sponsorship and support. Please do not apply if at any time you will need immigration support now or in the future (i.e., H-1B, PERM).

All positions, regardless of location, may require an onsite interview or in-person onboarding requirement to verify your identity.

• Design, develop, and maintain scalable backend services and APIs using C#/.NET
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• Build and support event-driven applications utilizing AWS services such as Event Bridge, Lambda, SQS, SNS, Step Functions, ECS, and related cloud-native technologies.
• Design and implement high-volume batch processing systems capable of handling large-scale payment workloads efficiently and reliably.
• Develop secure and resilient payment processing solutions that integrate with banking networks, payment gateways, and third-party service providers.
• Participate in architecture discussions and contribute to strategic modernization initiatives.
• Define and promote engineering standards, best practices, and design patterns for backend development.
• Collaborate closely with Product Owners, QA, Operations, and other engineering teams throughout the software development lifecycle.
• Perform code reviews and mentor engineers on backend development, cloud architecture, and software engineering best practices.
• Leverage AI tools and modern engineering practices to improve development productivity, software quality, and operational efficiency.
• Create and maintain technical documentation, test plans, and operational support guides.
• Participate in Agile ceremonies including sprint planning, daily stand-ups, backlog refinement, and retrospectives.
• Provide production support, troubleshooting, root cause analysis, and participate in on-call rotations for critical business systems.
• May perform other job duties as assigned.

• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related technical field.
• 4 years of software development experience, including:
  • 2+ years developing enterprise applications using C# and .NET.
  • 2+ years designing and supporting RESTful APIs and backend services.
  • Experience building large-scale batch processing applications.
• Stron…