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.

The Small and Medium Enterprises (SME) Partnerships and Loyalty team is seeking a Senior Software Engineer to apply full‑stack expertise in designing, building, deploying, and scaling real‑time, interactive applications used by thousands of clients worldwide. The role involves a broad range of responsibilities, including front‑end web development, server‑side logic, and database management. The ideal candidate will be hands‑on, with a strong focus on UI development, API integration, and building cloud‑native solutions that operate at a global scale and handle high‑volume workloads.

In this role, you will work within an agile development methodology, collaborating with other technical delivery teams while mentoring junior engineers to deliver robust, high‑quality solutions for new features and services. All team members contribute to the design, development, and testing of features.

This is a hybrid position based in Atlanta, GA, with optional O’Fallon, MO, requiring three days per week onsite.

• Design, build, test, deploy, and enhance full‑stack applications using Java, Spring Boot, React, Angular, PostgreSQL, SQL, No
  
  SQL, and Snowflake.
• Develop scalable microservices, REST APIs, and distributed systems that support real‑time analytics, reporting, and data‑driven applications.
• Build intuitive, responsive, and high‑performing user interfaces that transform complex data into meaningful insights and deliver exceptional customer experiences.
• Translate business and product requirements into secure, scalable, maintainable, and testable software solutions.
• Design, develop, and optimize database structures, queries, and data models for large‑scale, data‑intensive applications.
• Apply strong software engineering principles, including object‑oriented design, design patterns, data structures, algorithms, automated testing, code reviews, and CI/CD.
• Collaborate with Product Managers, Architects, Engineers and other stakeholders across global teams to deliver customer‑focused solutions.
• Continuously improve application performance, reliability, security, observability, and operational excellence.
• Contribute to Agile planning, estimation, prioritization, and delivery while taking ownership of technical outcomes.
• Leverage AI‑assisted development tools, including tools such as Git Hub Copilot, to accelerate coding, refactoring, testing, debugging, documentation, code reviews, and other software development activities, with appropriate engineering judgment and human oversight.
• Mentor team members, share technical knowledge, and help foster a culture of engineering excellence and continuous improvement.

• Extensive experience developing enterprise‑scale full‑stack applications, with strong expertise across backend services, frontend development, and database technologies.
• Extensive experience designing and developing Java applications, Spring Boot services, RESTful APIs, and microservices in enterprise environments.
• Strong hands‑on experience with React, Angular, JavaScript/Type Script, and responsive web application development.
• Proven experience designing and developing modern, responsive, and intuitive user interfaces that deliver engaging and effective…