Sr. Enterprise Engineer

ResultStack is seeking a Sr. Enterprise Engineer to modernize and support legacy point-of-sale and fuel system software for a major retail technology platform. This high-impact role focuses on enhancing core business-critical platforms and solving complex problems in high-volume environments.

Responsibilities:

• Modernize and support store-level POS and fuel control systems
• Payment Authorization Flow
• Translate legacy software into modular, maintainable code
• Troubleshoot production issues across hardware/software integrations
• Collaborate with engineers and product managers to scope modernization efforts
• Participate in code reviews, platform documentation, and refactoring legacy components
• Support system reliability and performance in high-transaction retail environments

Requirements:

• Must be a US CITIZEN or Have a GREEN CARD
• 8+ years of professional software engineering experience
• Strong hands-on experience with C++ and/or C# (.NET)
• Experience working on or modernizing legacy enterprise systems, ideally in retail, fuel, or POS industries
• Familiarity with hardware integration (e.g., payment terminals, barcode scanners, fuel pumps)
• Self-starter mindset with the ability to take ownership of legacy-to-modernization projects
• Experience with NCR platforms (Radiant, R10, StorePoint), Gilbarco, Verifone, or similar systems
• Software Engineer: 8 years
• C++: 5 years
• C#: 5 years
• .NET: 5 years
• Version Control: GitHub: 5 years
• Infrastructure: Docker, Windows-based systems: 5 years
• C-Stores: 3 years
• Writing Payment Network Authorizers: 3 years
• React, Node.js, AWS — exposure helpful but not required