Lead Payment Systems Engineer

A large retail company is seeking an experienced Lead Payment Systems Engineer 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, including developing RESTful APIs and microservices, integrating with payment gateways and banks, ensuring high availability and scalability, implementing PCI DSS compliant solutions, monitoring transaction flows, troubleshooting production issues, and improving reconciliation and settlement processes. The salary expectation for this role is $150k - $160k.

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to View email address on click.appcast.io learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy:


Required Skills & Experience
- 8+ years of hands-on experience with C#, .NET, and ASP.NET Core
- 5+ years of experience in retail and multi-channel payments (POS, e-commerce, mobile, and alternative payment methods)
- Strong experience building RESTful APIs, microservices, and backend distributed systems
- Proficiency with relational databases (SQL Server, Oracle, or PostgreSQL)
- Solid knowledge of secure coding practices, encryption, authentication, and PCI DSS compliance
- Bachelor's degree in Computer Science, Engineering, or equivalent experience
- Strong problem-solving, debugging, and troubleshooting skills for mission-critical systems


Nice to Have Skills & Experience
- Experience integrating with payment processors and gateways (Stripe, Adyen, PayPal, Fiserv, Authorize.net, etc.)
- Familiarity with cloud platforms (Azure or AWS) and cloud-native .NET applications
- Knowledge of messaging systems such as Azure Service Bus, RabbitMQ, or Kafka
- Experience with CI/CD pipelines and DevOps practices
Background in fintech, financial services, or high-availability payment systems
- Familiarity with SOX or other financial compliance standar


Benefit packages for this role will start on the 1st day of employment and include medical, dental, and vision insurance, as well as HSA, FSA, and DCFSA account options, and 401k retirement account access with employer matching. Employees in this role are also entitled to paid sick leave and/or other paid time off as provided by applicable law.