Payment Systems Engineer

Insight Global • Lincolnshire, IL, United States • Posted June 14, 2026

Location Lincolnshire, IL
Job Type Full-time
Category other-general
Posted June 14, 2026
Job Description
A large retail company is seeking an experienced Payment Systems Engineer (.NET) with strong .NET/C# expertise for a hybrid role based in Lincolnshire, IL, where candidates are required to work in the Lincolnshire office 2-3 days per week. This role focuses on designing, building, and maintaining secure, high-performance payment platforms by developing reliable transaction processing systems using .NET, C#, and ASP.NET Core, building RESTful APIs and microservices, integrating with payment gateways and banks, ensuring high availability and scalability, implementing PCI DSS compliant secure handling of sensitive payment data, monitoring transaction flows, troubleshooting production issues, and improving reconciliation and settlement processes. The salary expectation for this role is $130k - $140k.

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