Sr Principal Software Engineer - Microsoft Dynamics 365; ERP Onsite

Your success is a train ride away!

As we move America’s workforce toward the future, Amtrak connects businesses and communities across the country. We employ more than 20,000 diverse, energetic professionals in a variety of career fields throughout the United States. The safety of our passengers, our employees, the public and our operating environment is our priority, and the success of our railroad is due to our employees.

Are you ready to join our team?

Our values of ‘Do the Right Thing, Excel Together and Put Customers First’ are at the heart of what matters most to us, and our Core Capabilities, ‘Building Trust, Accountability, Effective Communication, Customer Focus, and Proactive Safety & Security’ are what every employee needs to know and do to be most impactful  living the Amtrak values, focusing on our capabilities, and actively embracing and fostering diverse ideas, backgrounds, and perspectives, together we will honor our past and make Amtrak a company of the future.

Role is located in Washington, DC, Philadelphia PA or Wilmington DE – Onsite 4-5 days per week.

Lead the analysis, design, development, and implementation of complex enterprise software solutions with a primary focus on Microsoft Dynamics 365 Finance & Operations (ERP). Provide senior‑level technical leadership across architecture, integration, and development initiatives, ensuring scalable, secure, and high‑quality system designs. Collaborate closely with project managers, architects, business analysts, and cross‑functional engineering teams to translate business requirements into robust technical solutions.

Drive architectural direction, guide development teams throughout the full project lifecycle, and serve as a key technical authority for Dynamics 365 ERP, related extensions, and enterprise‑level integrations.

• Provide technical leadership as a Senior Developer and Technical Architect for Microsoft Dynamics 365 Finance & Operations (Commerce/Retail, Supply Chain, Inventory, Finance, Administration).
• Lead the development, integration, and lifecycle management of Payment Connectors for D365 POS, ensuring seamless operation in both Online and Store & Forward modes.
• Architect and develop extensions for D365 HQ, CSU, and POS, ensuring high‑quality, scalable, and maintainable solutions.
• Lead software development, ensuring clear requirements, documented methodology, and unit testing to deliver code as designed; design sustainable architecture. Evaluate operational feasibility through analysis, problem definition, requirements, and solution development; lead technical direction and decisions.
• Collaborate with enterprise architects and infrastructure teams to integrate applications and hardware, ensuring designs and implementations meet security and QA standards. Maintain updated documentation for architectures, designs, and system descriptions; ensure development teams adhere to standards for methodologies, integration, tools, and testing.
• Prepare and install solutions by designing system specifications and standards, follow Information Security standards, and provide technical guidance, reports, and presentations for senior management.

• Bachelor’s Degree or equivalent combination of education, training and/or relevant experience.
• Plus 9 years of relevant work experience.

• Bachelor’s Degree or equivalent combination of education, training and/or relevant experience.
• Plus 11 years of relevant work experience.

• Deep expertise in Microsoft Dynamics 365 Finance & Operations Commerce (formerly Retail), Supply Chain, Inventory, Finance, and Administration as a Technical Architect and Senior Developer.
• Strong experience developing and managing Payment Connectors for D365 POS with full support for Online and Store & Forward modes.
• Strong development experience coding extensions for D365 HQ, CSU, and POS.
• Advanced knowledge and hands‑on experience with .NET, SQL Server, X++, C#, Java, Azure, and AWS technologies (such as S3, Lambda, Glue, etc.). Knowledge of Mule Soft, Azure Data Lake, Enterprise Data Warehouse technologies, Crystal…