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

Overview:

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.

Role:

• Design, build, test, deploy, and enhance full-stack applications using Java, Spring Boot, React, Angular, PostgreSQL, SQL, NoSQL, 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 GitHub 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.

All About You:

• 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/TypeScript, and responsive web application development.
• Proven experience designing and developing modern, responsive, and intuitive user interfaces that deliver engaging and effective user experiences.
• Strong database design, data modeling, SQL, NoSQL, PostgreSQL, Snowflake, query optimization, and performance tuning skills.
• Strong understanding of microservice architecture, distributed systems, API design, and cloud-native development practices, Azure experience preferred.
• Strong understanding of object-oriented design principles, design patterns, data structures, algorithms, and software architecture.
• Experience designing and developing event-driven applications, scalable distributed systems, and data-intensive applications.
• Experience using AI-assisted software development tools, such as GitHub Copilot, to improve productivity and software quality across coding, refactoring, testing, debugging, documentation, and delivery.
• Strong understanding of modern software engineering practices, including automated testing, CI/CD, Git-based development, code reviews, observability, and operational readiness.
• Demonstrated ability to operate effectively in an Agile engineering environment, contributing to collaborative technical decision-making and continuous improvement.
• Ability to work independently, manage competing priorities, and make thoughtful technical decisions with minimal supervision.
• Strong communication and collaboration skills, with the ability to explain technical concepts and influence decisions across technical and non-technical audiences.
• Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related field, or equivalent practical experience.

This role is not eligible for Mastercard’s work authorization sponsorship. As such, candidates must be eligible to work in the United States, now as well as in the future, without employer sponsorship.

Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

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.

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