Location: Lincolnshire, IL
Duration: Contract (C2C/W2/1099)
JOB DESCRIPTION: 
We’re building a modern, scalable enterprise payments platform to support seamless transactions across in-store POS, e-commerce, mobile, kiosk, and call center channels.
As a Payment Systems Engineer, you’ll play a key role in designing, building, and scaling payment capabilities. You’ll work closely with Product, Architecture, and other engineers to deliver reliable, secure, and high-performing payment solutions.
This is a hands-on role for someone who enjoys solving real-world problems, working with external payment providers, and shipping production-ready systems.
________________________________
Key Responsibilities
Platform Development & Integrations
*	Design, build, and maintain payment services and APIs using C# and .NET/.NET Core
*	Integrate with payment processors, gateways, acquiring banks, and third-party providers
*	Support integrations with digital wallets (Apple Pay, Google Pay, Samsung Pay) and alternative payment methods
*	Contribute to building a payment abstraction layer that simplifies multi-provider integrations
*	Implement payment flows including authorization, capture, settlement, refunds, and chargebacks
Payments Functionality & Features
*	Develop and enhance capabilities such as payment routing, retry logic, and failover handling
*	Support card-present and card-not-present payment flows (POS, e-commerce, mobile)
*	Work on mPOS, in-app payments, hosted payment pages, and Text-to-Pay solutions
*	Implement and maintain integrations using REST APIs, webhooks, and other payment protocols
Reliability & Operations
*	Monitor and troubleshoot payment transactions and production issues
*	Improve system performance, scalability, and transaction success rates
*	Participate in incident response and root cause analysis, implementing fixes and improvements
*	Contribute to observability through logging, metrics, and alerting
Collaboration & Delivery
*	Partner with Product and Architecture teams to translate requirements into technical solutions
*	Participate in sprint planning, backlog grooming, and code reviews
*	Write clean, maintainable, and well-tested code
*	Continuously improve development practices, tooling, and processes
________________________________
Required Qualifications
*	5–10 years of software engineering experience
*	Strong proficiency in C# and .NET/.NET Core
*	Experience building and consuming RESTful APIs
*	Hands-on experience integrating with third-party systems or APIs
*	Familiarity with payment systems or financial transactions
*	Understanding of secure coding practices and data protection
*	Experience with relational databases (SQL Server, PostgreSQL, etc.)
*	Strong problem-solving skills and ability to debug production issues
*	Effective communication skills and ability to work in a collaborative environment
________________________________
Preferred Qualifications
*	Experience with payment gateways, processors, or POS systems
*	Familiarity with payment concepts such as EMV, tokenization, 3DS, and PCI-DSS
*	Experience with event-driven systems or messaging platforms (Kafka, RabbitMQ, Azure Service Bus)
*	Exposure to cloud platforms (Azure, AWS, or GCP)
*	Experience with digital wallets and mobile payments
*	Familiarity with alternative payment methods (ACH, BNPL, real-time payments)
*	Experience working in Agile/Scrum environments (Jira, Azure DevOps, etc.)
;
Software Engineer

Contract Job Opportunity for Payment Systems Engineer- .NET role in Lincolnshire, IL (Hybrid)
