Pat MacMannis

An experienced Engineering Leader with over 18 years of professional experience. You use my software every day!

A software engineering executive, architect, and hands-on engineer with over 18 years of experience building high-scale financial, loyalty, commerce, healthcare, and enterprise platforms. I’ve led over 125 engineers, served over 60 clients, supported two acquisitions, and guided systems handling millions of users and billions in monthly activity. My expertise spans .NET, C#, cloud, DevOps, databases, payments, PCI DSS, compliance, and agentic AI. I pair deep technical ownership with pragmatic leadership, clear communication, and a record of simplifying complex systems into reliable, secure, maintainable software.

As an entrepreneur, I bring more than execution. I’ve founded and co-founded companies, worked directly with clients, joined fundraising and board conversations, and turned unclear business problems into practical products. I balance product direction, architecture, delivery cost, team capacity, and customer value as both a builder and business-minded technical partner.

Pittsburgh, PA
Software Engineering