Senior Full Stack .NET Developer Payment Systems

Senior Full Stack.NET Developer Payment Systems

Location: Harrisburg, PA - Hybrid

Duration: 1 Year

Hybrid work arrangement with a minimum of 2 days per week onsite/in-office

Job Description

We are seeking a highly skilled IT Consultant to design, develop, and implement a secure eCheck payment solution integrated with our existing Online Payment System (OPS). This role will focus on building a seamless user experience by enabling customers to initiate payments via a web interface linked from the PUC website(s), ensuring reliable, compliant, and scalable transaction processing. The ideal candidate will bring deep expertise in payment systems, web application development, and system integration, with the ability to deliver high-quality solutions in a regulated environment.

Key Responsibilities

• Design and develop a web-based eCheck (ACH) payment module that integrates with the existing OPS platform.
• Build and maintain a secure customer-facing payment interface accessible via the PUC website(s).
• Develop backend services and APIs to support payment workflows, validation, and transaction processing.
• Ensure compliance with financial regulations, security standards, and data protection requirements (e.g., PCI-DSS, NACHA guidelines).
• Collaborate with internal stakeholders to gather business and technical requirements and translate them into effective system architecture and user experience designs.
• Design, integrate, test, and deploy the eCheck solution with existing enterprise/legacy systems and payment workflows.
• Conduct usability reviews and recommend interface improvements based on user feedback, analytics, and best practices.
• Ensure compliance with accessibility standards and modern web usability guidelines for public-facing applications.
• Troubleshoot and resolve issues related to payment processing, system interfaces, and performance.
• Document system architecture, workflows, and technical specifications.
• Provide recommendations for scalability, reliability, and future enhancements.
• Support ongoing maintenance, upgrades, optimization, and production support.
• Participate in code migration from TFS to Azure DevOps (ADO) with Git version control.
• Utilize Azure DevOps (ADO) for work item tracking, CI/CD pipelines, and code management.

Required Skills

• Bachelor's degree in computer science, Information Technology or related field (or equivalent experience).

• 5+ years of experience in software development and system integration, including integration with enterprise and legacy platforms.

• Proven experience developing and integrating payment processing systems (ACH/eCheck preferred), including secure transaction processing, encryption.

• Strong proficiency in modern web application development, including JavaScript, HTML/CSS, front-end frameworks, and technologies such as Java, .NET.

• Demonstrated experience designing and developing customer-facing web applications with strong UI/UX focus, including responsive design, accessibility.

• Experience implementing APIs and system integrations using REST and/or SOAP services.

• Experience with relational databases and data modeling.

• Experience with Azure DevOps (ADO) for work item management, repositories, and CI/CD pipelines.

• Experience migrating code from TFS to Git-based repositories.

• Background in government, utilities, or other highly regulated environments.

• Experience integrating with enterprise and legacy systems.

• Experience with Microsoft Azure services, including App Services, Functions, and API Management.

• Experience designing customer-facing payment, checkout, banking, or other transaction-based digital experiences, including application of UI/UX best practices.

• Experience with high-availability, transaction-based systems, including online billing, invoice payment platforms, ACH processing workflows, and banking.