Sr. Enterprise Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Enterprise Engineer based in the United States.

This role sits at the core of large-scale retail and fuel system technology, where reliability and performance directly impact millions of real-world transactions. You will be responsible for modernizing and supporting complex legacy point-of-sale (POS) and fuel control systems used across high-volume environments. Working in deeply technical C++ and .NET ecosystems, you will help transform monolithic legacy platforms into more modular, maintainable architectures. The environment is highly systems-focused rather than web-oriented, making it ideal for engineers who enjoy low-level problem solving and infrastructure-heavy work. You will collaborate closely with engineering and product teams to improve performance, stability, and maintainability of mission-critical systems. This is a high-impact, hands-on role where your work directly supports retail and fuel operations at national scale.

You will be responsible for maintaining, modernizing, and enhancing mission-critical enterprise systems that power in-store and fuel transaction workflows, ensuring stability, performance, and long-term scalability across complex environments. This includes:

• Modernizing and maintaining legacy POS and fuel control systems used in high-volume retail and fuel environments
• Developing, refactoring, and optimizing applications using C++, C#, and .NET to improve modularity and maintainability
• Supporting payment authorization flows and ensuring reliability across transactional systems
• Troubleshooting and resolving production issues across integrated hardware and software systems, including payment terminals, scanners, and fuel equipment
• Collaborating with cross-functional engineering and product teams to define modernization strategies and technical requirements
• Participating in code reviews, documentation efforts, and system design improvements for legacy-to-modern transitions
• Ensuring high availability and performance of systems operating in mission-critical, real-time environments

Requirements:

The ideal candidate is a highly experienced software engineer with a strong background in enterprise systems, legacy modernization, and low-level application development. You should be comfortable working in complex technical environments where reliability and precision are critical.

• 8+ years of professional software engineering experience
• Strong hands-on expertise in C++ and/or C# (.NET) development
• Proven experience modernizing or maintaining legacy enterprise systems, ideally in POS, retail, or fuel domains
• Solid understanding of hardware-software integration, including payment devices, scanners, or fuel systems
• Strong debugging and troubleshooting skills in production environments
• Experience working with GitHub and modern version control workflows
• Familiarity with Docker and Windows-based infrastructure environments
• Strong ownership mindset with the ability to independently drive modernization initiatives
• Bonus experience with NCR systems (Radiant, R10, StorePoint), Gilbarco, Verifone, or similar platforms
• Bonus exposure to React, Node.js, or AWS environments

Benefits:

• Competitive salary package aligned with experience
• 401(k) retirement plan
• Comprehensive health, dental, and vision insurance
• Paid time off (PTO)
• Flexible schedule options
• Tuition reimbursement and professional development support
• Opportunity to work on mission-critical systems with national-scale impact