Software Engineer/Java Developer

Introduction:

This role is for a Sr. Software Engineer with our client Mastercard, based in O''Fallon, Missouri. The position involves working on a hybrid basis, with 3 days in the office per week. The candidate will be responsible for designing and building the next-generation Decision Management Platform, focusing on real-time payment transaction scoring and approval.

Responsibilities:

• Develop enterprise applications using Java technology stack with Angular or React as front-end technologies.
• Participate in gathering and refining business requirements.
• Ensure software designs align with client''s Enterprise Architecture and leverage enterprise services.
• Ensure product development meets client''s business needs.
• Apply client standard development methodologies, follow technology standards, and ensure projects are appropriately documented.
• Ensure software and system design support the goal of zero downtime in production.
• Work closely with business partners on product definition, roadmaps, business case development, and overall team direction.
• Respond to operational and business concerns related to future programs, projects, or enhancements to ensure consistent delivery of quality services.
• Support appropriate certifications and compliance requirements, including PCI, GLBA, Safe Harbor, and others.
• Drive performance engineering of the enterprise software architecture and provide guidance, advice, or training to other application developers.
• Improve and expand the existing platform by ensuring it is resilient, secure, and scalable.
• Use AI tools effectively as part of daily development work, including tools such as Claude Code, Copilot, or similar platforms.

Requirements:

Required Skills:

• Java 8+, J2EE, Spring, Hibernate
• Angular/React front-end development
• REST/SOAP APIs and enterprise application development
• Cloud-Native / AWS or Other Cloud Platforms
• CI/CD and engineering tools like Jenkins, Maven, Gradle, Chef, and Sonar
• Ability to leverage GenAI tools to improve developer productivity
• Apply AI-assisted coding, testing, documentation, and troubleshooting
• Explore practical GenAI use cases for modernization, automation, and platform efficiency

Preferred Skills:

• Experience with SQL and NoSQL databases such as MySQL, PostgreSQL, and MongoDB.
• Experience with web services (SOAP/RESTful), servers (WebSphere, JBoss, Tomcat), HTML, JavaScript, jQuery, React or Angular, and IDEs such as Microsoft Visual Studio or Eclipse.
• Experience with tools such as Maven, Gradle, Jenkins, Chef, and Sonar, as well as methodologies such as Waterfall and Agile.
• Experience with LLM integration, prompt engineering, and agentic patterns.

All About You:

• Bachelor’s degree in information systems, Information Technology, Computer Science, Engineering, or equivalent work experience.
• More than 7 years of industry experience.
• Excellent communication skills, with the ability to interact across multiple organizational levels and with internal and external customer groups.
• Strong analytical and problem-solving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems.
• High energy, strong attention to detail, and the ability to function independently under pressure with a high degree of initiative and self-motivation.
• Strong interpersonal and relationship-building skills, with a solid track record of developing internal and external partnerships.
• Proficiency with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and databases such as Oracle and SQL Server.