[Remote] Software Engineer III: Backend C#

Note: The job is a remote job and is open to candidates in USA. Jack Henry is hiring a Software Engineer III to design, develop, and support cloud-native backend services, APIs, and high-volume batch processing solutions for its payment platform. The role focuses on modernizing and scaling payment processing with AWS, event-driven architecture, distributed systems, and reliable integrations with financial networks and providers.

Responsibilities

• Design, develop, and maintain scalable backend services and APIs using C#/.NET
• Build and support event-driven applications utilizing AWS services such as EventBridge, 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

Skills

• 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)
• 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
• Strong experience designing and implementing event-driven architectures and asynchronous processing patterns
• Hands-on experience with AWS cloud services, including EventBridge, Lambda, SQS, SNS, ECS, CloudWatch, and related technologies
• Proven experience integrating with payment processors, banking systems, ACH networks, or payment gateways
• Experience working with MySQL and SQL Server, including:
• Database schema design
• Query optimization
• Stored procedures and functions
• Performance tuning
• Experience leveraging AI tools and technologies to improve software development, testing, troubleshooting, and operational efficiency
• Excellent analytical, troubleshooting, and problem-solving skills
• Strong verbal and written communication skills
• Experience with Microsoft Orleans and virtual actor-based distributed systems
• Experience building microservices architectures
• Familiarity with Terraform, Infrastructure as Code (IaC), or cloud automation tools
• Experience implementing monitoring and observability solutions using CloudWatch, OpenTelemetry, Grafana, Datadog, or similar platforms
• Experience working in regulated financial services or payment processing environments
• Knowledge of CI/CD pipelines, GitHub Actions, Azure DevOps, or similar deployment platforms
• Familiarity with security best practices, authentication, authorization, and secure software development principles
• Experience supporting high-availability systems requiring 24x7 operational support

Benefits

• Full-time, fully remote capacity; may be worked remotely within the United States, with the exception of California. An onsite interview or in-person onboarding may be required to verify identity.

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