Sr Software Engineer

Tittle: Sr. Software Engineer

Location: Strongsville, OH or Pittsburgh, PA

Work Mode : Hybrid (3days Office / 2days Remote)

Duration: Contract to Hire

Years Of Exp Required: 10+ Years

Function of the Group: Payment Center team creates "one stop shop" for businesses to manage their payment activity.

Industry Background: Financial/Banking experience. Micro App experience is a major benefit

Job Responsibilities:

• Design, build, and maintain inner/orchestration microservices that integrate multiple backend systems (payments, accounts, vendors) to support Payment Center capabilities

• Develop and enhance API layers and service-to-service interactions, ensuring secure, scalable, and reliable data aggregation across systems

• Collaborate closely with the front-end Payment Center team and Business to build and integrate UI components (e.g., Payroll tile) and ensure seamless end-to-end user experiences

• Troubleshoot and optimize performance, resiliency, and fault tolerance across distributed services, including debugging production issues

• Participate in Agile ceremonies and cross-team coordination to align backend orchestration logic with business flows (ACH, Bill Pay, Payroll, etc.) and ensure timely delivery

Required Skills

• Strong experience building and integrating microservices (Spring Boot / Java preferred)

• Hands-on experience with backend service design for complex domains (APIs, orchestration, service-to-service communication)

• Solid understanding of event-driven architecture (Kafka or similar messaging platforms)

• Experience with containerization and deployment (Docker, Kubernetes/OpenShift)

• Expertise in API design and integration patterns (REST, secure APIs, contract-first design)

• Familiarity with enterprise authentication/authorization patterns (CIAM, OAuth, JWT)

• Experience working with distributed systems, including resiliency, scaling, and fault tolerance

• Strong debugging and performance tuning skills across microservices

• UI development experience (Angular or similar) to support front-end integration—specifically for building and integrating UI components like the Payroll tile

Flex Skills/Nice to Have:

• Experience with financial services or payments platforms (billing, payroll, account servicing)

• Exposure to Payroll integrations (ADP or similar providers)

• Familiarity with enterprise data platforms (BDC, FNW, or similar transaction/data systems)

• Experience with CI/CD pipelines and DevOps practices

• Knowledge of feature toggles and rollout strategies for phased releases

• Experience working in Agile delivery models with cross-functional teams

• Understanding of UI/UX best practices for customer-facing applications

• Exposure to observability tools (Splunk, Dynatrace, or similar)

• Prior experience working in large-scale enterprise environments with multiple dependent systems

Ref: #404-IT Pittsburgh

System One, and its subsidiaries including Joulé, ALTA IT Services, CM Access, TPGS, and MOUNTAIN, LTD., are leaders in delivering workforce solutions and integrated services across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible full-time employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.