Pat MacMannis

Senior Software Engineering Manager

January 2025 - Present

Green Dot Corporation, Greensburg, PA

• Manage a team of 10 engineers responsible for rebuilding and migrating a core mobile finance and banking platform.
• Help guide architecture for a platform with more than 40 million active users, more than $7 billion in monthly activity and multiple third-party integrations.
• Introduce and refine agentic AI development techniques for the engineering team.
• Assume ownership for modernization and improvement of legacy platform capabilities.
• Act as a business and client-facing representative of engineering while shielding teams from distractions and removing impediments.

Lead Architect / Software Engineer / Co-Founder

September 2020 - Present

Dream Invent Inspire, Inc., Pittsburgh, PA

• Architected and developed Dreamspire, a collaboration design tool built around PlantUML.
• Architected, developed, released and maintain dii.storage, a dynamic pseudo-ORM.
• Architected, developed, released and maintain dii.storage.cosmos, a Cosmos DB extension for dii.storage.
• Design and implement new technologies and techniques, including agentic AI workflows.
• Participate in board meetings, fundraising, software design, database design and hardware and software development.

Architect & Lead Software Engineer / Founder

May 2008 - Present

tuple.pro, Greensburg, PA

• Designed and created multiple MCP servers for client applications.
• Optimized customer value by using agentic AI techniques to improve delivery efficiency.
• Architected, developed, deployed and maintained multiple websites and applications for various clients.
• Designed dynamic solutions for clients, including custom enterprise applications.
• Developed a basic PHP MVC framework for small sites and a robust multi-tenant .NET CMS for larger projects.
• Architected and developed fixes to meet HIPAA and federal regulations.
• Key clients include Atlanta Falcons, Kroll, InSeeGo, UPMC, Northwest Savings Bank, Industrial Scientific, Center for Safety & Environmental Management, Christ's Church of Greensburg and Our Mission House Publishing.

Senior Director of Engineering / Architect & Lead Software Engineer

June 2022 - January 2025

RedSail, Charlotte, NC

Emporos was acquired by RedSail in January 2025.

• Guided Emporos through engineering diligence for a successful acquisition.
• Architected and developed payment software unlocking more than $1 million in potential ARR within the first year.
• Achieved PCI DSS 4.0 attestation as a Level 1 service provider.
• Integrated and certified multiple payment gateways, including Global Payments, FIS/Worldpay and Elavon.
• Architected link-to-pay solutions that enabled user-owned device payments through a secure, PCI DSS 4.0-compliant interface.
• Ensured HIPAA compliance, SOC 2 compliance and strict enforcement of safe logging and data storage practices for ePHI, PHI and PII.
• Directed an engineering department consisting of six-member engineering squads across four scopes of work.
• Presented engineering department updates to the board, company and executive team.

Engineering Lead of the Loyalty and Offers Product Lines / Architect & Lead Software Engineer

April 2018 - June 2022

SessionM, A Mastercard Company, Pittsburgh, PA

SessionM was acquired by Mastercard in October 2019.

• Led engineering for an award-winning loyalty and offers platform responsible for more than $59 million in ARR.
• Led two teams responsible for core SessionM architecture after Mastercard acquired SessionM in October 2019.
• Architected, developed, tested and deployed hierarchical data structure storage with less than 25ms response time and more than 150 TPS throughput.
• Assumed ownership for multiple key domains that power the backbone of SessionM's infrastructure.
• Architected multiple components involving security and performance to satisfy TPS requirements.
• Acted as business and client-facing representative of engineering to reduce scope creep and keep feature work on track.
• Performed code reviews on proposed solutions and provided thoughtful and constructive feedback.

Lead Software Engineer

January 2016 - March 2018

Plus Consulting, Inc., Carnegie, PA

• Hired and led a 25-member engineering team across three scopes of work.
• Architected, developed and deployed multiple major components for client applications.
• Managed work streams for the team to avoid duplicate effort and deliver budget-friendly solutions.
• Resolved conflicts between team members effectively and efficiently.
• Mentored developers on new techniques and stressed the importance of clean, efficient code.
• Administered the technical phone screen and code test for all prospective engineers.
• Acted as liaison between the client and development team as a technical presence in meetings and presentations.

Senior Software Engineer

May 2015 - January 2016

Black Box Network Services, Lawrence, PA

• Active contributor in the design, development, testing and support of a new e-commerce site through security audits, performance audits and code reviews.
• Designed and implemented advanced real-time search with another developer using Solr.
• Coordinated team efforts with JIRA and provided additional organization via business requirements gathering.
• Accelerated timeline of legacy features and debugging by providing in-depth analysis and completing groups of tickets in target areas.
• Successfully completed legacy backlog three months ahead of schedule with a clear and focused approach to development and planning.
• Integrated Sitefinity CMS and AX with a new e-commerce application.

Software Engineer

February 2013 - May 2015

ZAP Solutions, Inc., Pittsburgh, PA

• Quick learner with new technologies by performing research and creating proof of concepts to test new features.
• Created dozens of new marketable features and incorporated them into the primary template for the platform to redistribute.
• Worked with other departments to improve communication and cooperation, which helped streamline development time.
• Professional and timely assistance to clients on conference calls and live debugging sessions.
• Successfully bridged the gap between non-technical clients and the development team.
• Deployed and maintained multiple instances of the AMP application within client environments remotely.

Full Stack Software Engineer

May 2012 - February 2013

Insight Marketing Solutions, Inc., Wexford, PA

• Provided clients with up-to-date technologies and techniques to reach their desired result quickly and effectively.
• Promoted proactive design and development rather than waiting for clients to become unhappy with existing bugs.
• Contributed heavily to the redesign and development of the eWell.co platform.
• Created entire websites from Photoshop files provided by clients.
• Trained other employees on software engineering concepts.
• Created a dozen websites and applications for assorted clients in quick turnaround.