# Senior Software Engineer **Company**: Mastercard **Location**: O'Fallon, Missouri **Experience**: senior **Job type**: full-time **Salary**: $115,000 - $184,000 USD **Category**: Engineering **Industry**: Finance **Apply**: https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/OFallon-Missouri/Senior--Software-Engineer_R-293457?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply **Canonical**: https://yubhub.co/jobs/job_28549b6a-c19 ## Description Mastercard is seeking a Senior Software Engineer to join the Decision Management Program (DMP) team. The successful candidate will design, develop, test, deploy, and maintain complex backend software applications and services, with a strong focus on Java-based development. The DMP delivers industry-leading intelligence that enables faster, smarter decisioning at global scale across the payment journey and beyond. The ideal candidate will have a strong technical expertise to solve nontrivial engineering problems, influence design decisions, and improve engineering practices while collaborating closely with product, operations, and other stakeholders. **Responsibilities:** - Own software delivery activities at the application or software-component level, including backend development, testing, deployment, release, configuration, and documentation. - Design and develop scalable, secure, reliable, and maintainable Java-based applications, APIs, services, and backend components. - Translate business and technical requirements into scalable, secure, reliable, and maintainable software designs. - Develop high-quality Java software using appropriate algorithms, data structures, coding standards, and engineering best practices. - Design, develop, and maintain automated unit, functional, integration, and regression tests to validate software functionality, service interactions, and code changes. - Incorporate test automation and regression testing into the software development lifecycle to support code quality and reliable releases. - Troubleshoot, diagnose, and refactor existing code to improve quality, maintainability, performance, and reliability. - Apply secure coding practices throughout the software development lifecycle to identify and reduce application vulnerabilities. - Adopt new programming languages, frameworks, and architecture patterns based on business and technical needs. - Participate in the team’s agile processes, technical decisions, backlog refinement, and prioritization activities. - Deliver prioritized backlog work in partnership with the full scrum team, seeking guidance when appropriate. - Automate software build, testing, deployment, operational, and runtime processes. - Lead code, design, and process trade-off discussions within the team when required. - Drive the integration of backend services and APIs with a focus on the customer journey and overall experience. - Perform product demonstrations and participate in acceptance discussions with Product Owners. - Improve operational readiness by incorporating reliability, observability, monitoring, and measurable engineering practices into software solutions. - Analyze and optimize applications and services for performance and scalability through testing, tuning, and ongoing evaluation. - Develop a comprehensive understanding of end-to-end technical architecture, system interactions, and dependencies. - Drive the adoption of technology standards and approved frameworks, and review the development, testing, design, and automation work of team members. - Mentor and guide new and less-experienced team members through technical support, code reviews, and knowledge sharing. - Identify opportunities to improve engineering processes, reduce waste, and increase team productivity. - Share and seek knowledge within relevant Guilds and Programs to promote the reuse of patterns, libraries, tools, and practices. **Requirements:** - Strong experience developing backend applications and services using Java, with demonstrated proficiency building production-quality software. - Strong understanding of Java development, backend software design, APIs, service-oriented architectures, algorithms, and data structures. - Experience applying secure coding standards and developing scalable, maintainable software. - Experience developing and maintaining automated unit, functional, integration, and regression testing as part of software development. - Experience incorporating test automation into CI/CD and software delivery practices to improve quality and release reliability. - Strong code-review skills, including the ability to identify quality, security, maintainability, and standards-compliance concerns. - Experience troubleshooting complex application and system issues. - Familiarity with performance engineering, performance tuning, automation, observability, and operational-readiness practices. - Solid experience with software development processes and one or more Application Lifecycle Management tools. - Success producing high-quality software designs, technical deliverables, and documentation. - Demonstrated experience applying AI technologies or capabilities within a software engineering context. - Proactive, detail-oriented, and able to operate independently in a fast-paced environment. - Passion for continuous learning and solving challenging technical problems. Strong verbal and written communication, relationship-building, collaboration, and organizational skills. - Strong commitment to the timely delivery of key objectives. - Sound decision-making skills and a continuous-improvement mindset. - Bachelor’s degree in Computer Science or a related technical field, or equivalent practical experience. **Benefits:** - Insurance (including medical, prescription drug, dental, vision, disability, life insurance) - Flexible spending account and health savings account - Paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave) - 80 hours of Paid Sick and Safe Time - 25 days of vacation time and 5 personal days, pro-rated based on date of hire - 10 annual paid U.S. observed holidays - 401k with a best-in-class company match - Deferred compensation for eligible roles - Fitness reimbursement or on-site fitness facilities - Eligibility for tuition reimbursement ## Skills ### Required - Java - backend development - software design - APIs - service-oriented architectures - algorithms - data structures - secure coding standards - test automation - CI/CD - software development processes - Application Lifecycle Management tools --- Source: [Apply at mastercard.wd1.myworkdayjobs.com](https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/OFallon-Missouri/Senior--Software-Engineer_R-293457?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)