LI
Engineer Level 3
Leadstack Inc
Location not stated
Senior
1 month ago
$60 – $72 / hour
- Java
- Spring Boot
- REST API
- Microservices
- API Gateway
- point of sale
- POS
- Devops
- Event-Driven Architecture
- CI/CD
1 month ago
LeadStack Inc. is an award winning, one of the nation's fastest growing, certified minority owned (MBE) staffing services provider of contingent workforce. As a recognized industry leader in contingent workforce solutions and Certified as a Great Place to Workwe're proud to partner with some of the most admired Fortune 500 brands in the world.
Job Title: Advanced Software Engineer Level 3
Location: Blue Ash, OH – Onsite
Duration: 6 Month(s)
Employment Type: Contractor
Senior-level experience developing enterprise Java applications.
Strong hands-on experience with Java, Spring, and Spring Boot.
Experience developing RESTful APIs and backend microservices.
Experience with API Gateway integration and enterprise system integrations.
Hands-on Point-of-Sale (POS) experience, including working directly with POS terminals or related test environments.
Experience working in PCI-scoped, payment, financial, or other security-sensitive environments.
Ability to work effectively onsite with cross-functional technical teams.
Technology Stack Required:
Java, Spring, Spring Boot, REST APIs, API Gateway, Microservices, POS Integration, PCI/Secure Development Practices
Job Description
We are seeking an Advanced Software Engineer to join a newly established team supporting the Omnichannel Payment Platform (OPP) and a new Point-of-Sale (POS) system. This senior-level consultant will play a critical role in stabilizing the new POS environment and integrating it with OPP.
The ideal candidate will have strong hands-on experience with Java, Spring/Spring Boot, backend services, API Gateway integrations, and enterprise payment systems, along with practical POS experience. Experience working in PCI-scoped environments is highly valued.
Key Responsibilities
- Design, develop, and maintain backend services using Java and Spring Boot.
- Support the integration of the new POS platform with the Omnichannel Payment Platform (OPP).
- Develop and support integrations with enterprise API Gateway platforms and downstream services.
- Troubleshoot and stabilize POS-to-backend and payment processing integrations.
- Perform hands-on testing and troubleshooting using physical POS terminals and test hardware in the onsite POS lab.
- Develop secure, scalable, and highly available backend services.
- Work within PCI-scoped environments, adhering to applicable security and compliance standards.
- Collaborate with POS, payment, architecture, QA, DevOps, and product teams to resolve integration issues and accelerate delivery.
- Participate in technical design, code reviews, troubleshooting, and architecture discussions.
- Develop automated unit and integration tests to ensure reliable and maintainable solutions.
- Investigate complex integration and production issues and drive them through resolution.
- Support event-driven architectures and messaging technologies as required.
- Help establish development and integration practices for the newly formed OPP/POS team
- Preferred:
Kafka, Event-Driven Architecture, Payment Systems, CI/CD, Cloud, Containers
know more about current opportunities at LeadStack , please visit us on https://leadstackinc.com/careers/
Should you have any questions, feel free to call me on (513) 3184502 or send an email on waseem.ahmad@leadstackinc.com
Engineer Level 3 · Leadstack Inc