Software Engineer Senior

FIS Global•Jacksonville, FL

3d•Hybrid

About The Position

As a Java Developer/API Developer, you will develop, enhance, and provide production support for Java-based middleware applications and APIs. The role works across Xpress middleware and Code Connect APIs running on WSO2 environments, with a strong focus on application security vulnerability remediation. You will troubleshoot production incidents, monitor application alerts, and participate in a 24x7 on-call rotation for one week every six to eight weeks. The role is based in Jacksonville in a hybrid work arrangement. Current and future sponsorship are not available. You will help maintain and enhance middleware and API services used by hosted and non-hosted clients, strengthen application security through vulnerability remediation, support reliable production services, and contribute to incident response, troubleshooting, and enhancements across interconnected applications and banking platforms.

Requirements

6–10 years of Java development experience and strong object-oriented programming skills.
API development experience that includes Spring Core, Spring Integration, and multi-layered architectures.
Strong knowledge of REST and SOAP web services, Swagger, YAML, XML, JSON, XML Schema Definition (XSD), JSON Schema, and data transformation technologies.
Experience with relational database management systems, SQL, database management systems, and JDBC.
Working knowledge of application security remediation, including static application security testing and software composition analysis using Checkmarx One (CxOne), and addressing vulnerabilities in Java and API code.
Ability to provide production support and participate in a 24x7 on-call rotation for one week every six to eight weeks.

Nice To Haves

Experience with Xpress application programming and implementations, including IFX schemas, WebSphere application server configuration, and CICS applications.
Knowledge of WSO2 API Manager, Analytics, and Enterprise Integrator, as well as Splunk monitoring.
Banking industry experience.

Responsibilities

Lead the design and development of customer-requested enhancements and provide production support for Xpress middleware services and legacy middleware components that integrate with core banking systems.
Develop, enhance, and support Code Connect APIs using REST, SOAP, web services, YAML, Swagger definitions, WSO2 API Manager, and WSO2 Enterprise Integrator.
Remediate static-code, open-source, and AI-identified security vulnerabilities using Checkmarx One (CxOne) and Mythos across Java and API code.
Investigate production issues and monitor Splunk and ThousandEyes alerts to help identify application- or architecture-related issues.
Collaborate with other application teams on enhancements, troubleshooting, and production support, including responding to escalations and ServiceNow incidents during scheduled on-call coverage.