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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer II - **Company:** Mastercard - **Location:** O'Fallon, MO, United States - **Salary:** $92,000.0 - $147,000.0 - **Contract:** Permanent contract - **Skills:** HTML, Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Apache Tomcat, Application Performance Management, Automation of Tests, AWK (Programming Language), C Sharp (Programming Language), Unix, Cascading Style Sheets (CSS), Software as a Service, Software Quality, Code Review, Cyber Security, Information Systems, Databases, Continuous Integration, Information Engineering, Data Structures, Software Design Patterns, DevOps, Programming Tools, Eclipse (Software), Java Platform Enterprise Edition (J2EE), Gradle, Hibernate (Java), IBM Websphere Application Server, Java Servlet, Spring Framework, WildFly (JBoss AS), JQuery, Javaserver Pages, PostgreSQL, Apache Maven, Microsoft Visual Studio, Microsoft SQL Server, MongoDB, MySQL, NoSQL, Object-Oriented Software Development, Oracle (Applications), Open Web Application Security, Performance Tuning, Software Architecture, Reliability Engineering, Secure Coding, Simple Object Access Protocol (SOAP), Software Construction, Software Engineering, Software Systems, SonarQube, Software Vulnerability Management, Web Services, Extensible Stylesheet Language Transformations (XSLT), Data Logging, Enterprise Software Applications, Cloud Platform System, Spring Cloud, ReactJS, System Availability, Software Security, Build Management, Containerization, AngularJS, Information Technology, Non-relational Database, Data Management, Front End Software Development, Restful APIs, Network Server, Jenkins, Databricks - **Published:** October 11, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=c9c3d1ebb5b991ae ## About the Role * Strong analytical, troubleshooting, and problem-solving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems. * High-energy, detail-oriented, proactive, and able to function effectively in a fast-paced environment with a high degree of initiative and accountability. * Strong interpersonal and relationship-building skills with a proven ability to collaborate effectively across teams. * Excellent communication skills with the ability to interact across organizational levels and partner effectively with technical and non-technical stakeholders. * Strong understanding of data structures, algorithms, object-oriented design principles, and scalable application development techniques. * Experience developing and enhancing scalable, secure, maintainable, and high-performing enterprise software solutions. * Experience participating in code reviews and applying engineering best practices to improve software quality, maintainability, and security. * Experience developing unit, functional, integration, and automated testing solutions within enterprise applications. * Experience analyzing application performance, identifying bottlenecks, and implementing optimization improvements across applications, databases, and cloud environments. * Experience applying secure coding practices, application security principles, vulnerability remediation techniques, and OWASP-based security standards. * Proficient working with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and relational and non-relational database technologies including Oracle, SQL Server, MySQL, PostgreSQL, NoSQL, MongoDB, or comparable technologies. * Demonstrated troubleshooting and root cause analysis skills supporting business-critical applications in production environments. * Experience in the following is highly preferred: * Web Services (SOAP, RESTful APIs) * Servers (WebSphere, JBoss, Tomcat) * HTML, JavaScript, jQuery * UNIX (Shell, AWK scripting) * XML/XSLT * CSS * C# * React or Angular * IDEs (Microsoft Visual Studio, RAD, Eclipse) * Experience with development tools including Maven, Gradle, Jenkins, Chef, SonarQube, and related DevOps toolsets. * Experience working within Agile and Waterfall delivery methodologies. * Experience developing and supporting cloud-native applications utilizing AWS cloud services. * Understanding of observability, monitoring, operational readiness, and reliability engineering concepts. * Knowledge of data engineering concepts and experience working with DCP, Databricks, AWS, or enterprise-scale data platforms is preferred. * Bachelor's degree in Information Systems, Information Technology, Computer Science, Engineering, or equivalent practical experience is preferred. ## Description The Mastercard Operational Intelligence Program is engaged in developing innovative solutions through technology that keeps Mastercard positioned as a leader in delivering value-added business analytics and reporting solutions to our diverse customer base. We work collaboratively with our product partners and other technical teams to continuously improve and enhance our existing products and drive new products to the global marketplace., We are currently seeking a Software Engineer II to join the Mastercard Operational Reports NexGen development team to work on Enterprise Applications utilizing Java technology stacks and Angular/React front-end technologies. The successful candidate will contribute to the design, development, testing, deployment, and support of enterprise applications while applying software engineering principles to deliver scalable, secure, resilient, and maintainable solutions. This role will collaborate closely with cross-functional teams and contribute to continuous improvement initiatives that enhance application quality, reliability, and operational excellence., * Participate in the gathering and analysis of business requirements and translate them into scalable, maintainable, and secure software solutions. * Participate in application design discussions and contribute to software architecture, design patterns, component interactions, and technology standards under the guidance of senior engineers and technical leads. * Develop solutions that align with Mastercard Enterprise Architecture standards while leveraging enterprise services, frameworks, and reusable platforms. * Contribute to ensuring product development meets Mastercard's business, scalability, performance, security, and reliability requirements. * Follow Mastercard development methodologies, engineering standards, and documentation practices when designing and building software solutions. * Participate in code reviews to improve code quality, maintainability, security, consistency, and adherence to software engineering best practices. * Collaborate with team members, share knowledge, and seek guidance from senior engineers when addressing highly complex technical challenges. * Design, develop, and maintain unit, functional, integration, and automated tests to validate application functionality, system interactions, quality, and reliability. * Support continuous integration and continuous testing practices to improve software quality and release confidence. * Develop and maintain software solutions that support high availability, resiliency, operational readiness, and reliability objectives. * Respond to operational and business concerns related to applications, projects, and platform enhancements to ensure consistent delivery of quality services. * Investigate and resolve production, application, integration, and infrastructure issues using structured troubleshooting, root cause analysis, and corrective actions, escalating highly complex issues when appropriate. * Support compliance with required certifications and regulatory requirements, including PCI, GLBA, Safe Harbor, and other applicable standards. * Apply secure coding practices, security-by-design principles, and vulnerability prevention techniques throughout the software development lifecycle. * Identify and remediate application security vulnerabilities while ensuring alignment with Mastercard security standards and industry best practices. * Contribute to application performance optimization through monitoring, analysis, tuning, and scalability improvements across applications, APIs, databases, and cloud environments. * Apply data structures, algorithms, and software engineering principles to develop efficient, scalable, and maintainable software solutions. * Develop, test, deploy, monitor, and support cloud-based applications and services using AWS and cloud-native technologies while following established architecture patterns and engineering standards. * Design and build solutions with operational readiness in mind, incorporating observability, logging, monitoring, alerting, supportability, reliability, and maintainability best practices. * Contribute to the continuous improvement and expansion of the platform by helping ensure that solutions remain resilient, secure, scalable, highly available, and operationally efficient. * Collaborate with product owners, business partners, and engineering teams to understand requirements and provide technical input supporting product and platform objectives., All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must: * Abide by Mastercard's security policies and practices; * Ensure the confidentiality and integrity of the information being accessed; * Report any suspected information security violation or breach, and * Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.