# Senior Software Engineer **Company**: Mastercard **Location**: O'Fallon, Missouri **Work arrangement**: onsite **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-291630?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply **Canonical**: https://yubhub.co/jobs/job_bb4d1c13-5a8 ## Description At Mastercard Commercial Solutions, we empower businesses to succeed through innovative, trusted payment solutions that deliver seamless, digital-first experiences around the world. We are building a global business-to-business (B2B) technology platform that helps businesses of all sizes streamline how they manage payments when buying or selling products and services. The Mastercard Commercial Solutions team is looking for a Senior Software Engineer to advance our customer experience strategy through innovation and problem-solving. **Responsibilities** - Own software delivery activities at the application or software-component level, including design, development, testing, deployment, support, documentation, and configuration. - Develop full-stack solutions, including front-end applications, REST APIs, and backend services. - Translate business and technical requirements into scalable, secure, and maintainable software designs, defining appropriate components and system interactions. - Participate in Scrum ceremonies and contribute to continuous improvement using Agile methodologies. - Drive code, design, and process trade-off discussions within the team. - Promote the adoption of engineering principles, technology standards, and best practices. - Review code, testing, and automation produced by team members to ensure quality, security, standards compliance, and maintainability. - Develop a strong understanding of end-to-end technical architecture and system dependencies. - Evaluate application architecture and design decisions with consideration for scalability, performance, reliability, and long-term maintainability. - Mentor and guide new and less-experienced team members. - Develop and maintain unit, integration, functional, and regression tests. - Analyze and optimize application performance through testing, measurement, troubleshooting, and tuning. - Design and maintain applications for operational readiness by incorporating reliability, observability, monitoring, and effective production-support practices. - Troubleshoot production incidents and implement corrective and preventive actions. - Share and seek knowledge within the Guild and program to promote the reuse of patterns, libraries, and engineering practices. **Requirements** - Experience developing secure full-stack applications using backend and front-end technologies such as Java, JavaScript, Angular, and SQL. - Strong knowledge of Spring, Spring Data JPA, REST APIs, Kafka, and related frameworks. - Experience designing, implementing, and maintaining unit, service, integration, functional, and regression tests using tools such as JUnit, Mockito, and Jasmine. - Knowledge of application and design patterns used to implement APIs, event-driven services, batch services, and user-interface applications. - Strong understanding of data structures and their application in building efficient, reliable, and maintainable software. - Experience applying secure coding standards and vulnerability-management practices throughout the software development lifecycle. - Experience implementing API standards and cataloging practices to support service adoption, reuse, and commercialization. - Experience using tools such as Sonar, CxOne, Checkmarx, Black Duck, and Zally to evaluate code quality, security vulnerabilities, and anti-patterns. - Experience orchestrating release workflows and implementing standardized continuous integration and continuous delivery pipelines using tools such as Jenkins and XL Release. - Experience evaluating and improving application performance, scalability, and reliability using appropriate testing and tuning techniques. - Strong problem-solving and creative troubleshooting skills, with the ability to diagnose and resolve issues across applications and integrated systems. - Strong organizational skills and the ability to manage multiple priorities within business timelines. - Self-motivated and proactive, with a commitment to continuous improvement and delivering results. - Ability to thrive in a fast-paced, rapidly changing, and customer-focused environment. - Ability to promote full-stack engineering practices and end-to-end service ownership across teams. - Strong written and verbal communication skills. - Bachelor’s degree in Computer Science, Software Engineering, or a related field. - Eight or more years of relevant software engineering or information technology 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 - 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 - JavaScript - Angular - SQL - Spring - Spring Data JPA - REST APIs - Kafka ### Nice to have - Splunk - Dynatrace --- Source: [Apply at mastercard.wd1.myworkdayjobs.com](https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/OFallon-Missouri/Senior-Software-Engineer_R-291630?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)