Systems Engineer

Location:

Lincolnshire, IL (Hybrid)

Employment Type:

Full‑Time

Experience:

5–10 Years

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.

• 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.
• 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.

• 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, Postgre
  
  SQL, etc.).
• Strong problem‑solving skills and ability to debug production issues.
• Effective communication skills and ability to work in a collaborative environment.

• 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, Rabbit
  
  MQ, 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 Dev Ops, etc.).

Pay Range: $–$ annual.

We are an equal employment opportunity employer. The Company’s policy is not to discriminate against any applicant or employee based on race, color, sex, sexual orientation, gender identity, religion, national origin, age (40 and over), disability, veteran or uniformed service‑member status, genetic information, or any other basis protected by applicable federal, state, or local laws.