Senior Software Engineer

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible.

Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Role Summary We are seeking a skilled Software Engineer with strong foundations across software design, testing, performance engineering, and operability.

The role focuses on building scalable, secure, and high-quality applications while ensuring reliability and performance across the software lifecycle. Key Responsibilities Software Design & Development Translate business and technical requirements into scalable, maintainable, and secure designs Develop and maintain high-quality software solutions using modern engineering practices Architecture Support Contribute to system architecture discussions, ensuring alignment with scalability, performance, and security standards Apply established architectural patterns and design principles Quality Engineering Design and execute unit, functional, and integration tests Ensure high test coverage and reliability across services and applications Drive defect prevention through early testing practices Performance Engineering Analyze and optimize application performance under varying workloads Conduct performance testing, tuning, and monitoring to meet SLAs Secure Coding & Compliance Follow secure coding practices to prevent vulnerabilities Ensure adherence to enterprise security standards and guidelines Code Quality & Reviews Participate in peer code reviews to ensure maintainability, readability, and adherence to standards Continuously improve code quality practices Operability & Reliability Design systems with observability, monitoring, and operational readiness in mind Ensure systems are maintainable and supportable in production Problem Solving & Troubleshooting Diagnose and resolve issues across systems and applications Minimize downtime through effective analysis and resolution Required Skills & Qualifications Solid understanding of: Software Design & Development principles Data Structures and efficient data handling Testing strategies: Unit, Functional, and Integration Performance engineering and optimization techniques Secure coding practices Hands-on experience in: Code reviews and quality improvement practices Troubleshooting distributed systems and applications Building reliable and operable software systems Corporate Security Responsibility 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.