Senior Software Engineer

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.

Senior Software Engineer Overview:
Mastercard’s Commercial Customer Experience team is seeking a Senior Software Engineer to help design, develop, and deliver scalable, secure, and high-performing software solutions that power critical customer experiences and business capabilities. This is a hands-on full-stack engineering role with a strong focus on backend development using Java and Spring Boot, while also contributing to modern web applications built with Angular.

The ideal candidate will have experience building enterprise-scale applications, microservices, REST APIs, and event-driven systems using streaming technologies such as Apache Kafka. You will play a key role in developing cloud-native solutions, driving engineering excellence, and delivering resilient, customer-focused products in a collaborative Agile environment. You will work from Mastercard's technology hub in a collaborative, Agile environment alongside talented engineers, product managers, technical program managers, and test engineers.

This is a hybrid role based in Arlington, VA, requiring three days per week onsite.

• Design, develop, and evolve secure, scalable Java/Spring Boot microservices and APIs.
• Build and maintain full-stack applications, contributing to both Angular-based user interfaces and Java/Spring Boot backend services.
• Design and implement event-driven architectures using Apache Kafka or similar streaming and messaging technologies.
• Translate business and product requirements into reliable, maintainable technical solutions, contributing to system architecture and technical design.
• Build and integrate services across Angular applications, databases, internal platforms, and third‑party systems, including efficient SQL and database solutions for high-volume workloads.
• Apply AI-assisted development tools to accelerate coding, testing, debugging, documentation, code reviews, and software quality improvements with appropriate human oversight.
• Develop solutions that meet Mastercard standards for security, performance, scalability, reliability, and operational excellence, applying enterprise security patterns such as authentication, authorization, encryption, and secrets management.
• Apply 12-factor application principles, cloud-native practices, and Mastercard engineering governance throughout the development lifecycle.
• Participate in code reviews, pull requests, retrospectives, and technical discussions, contributing to high-quality engineering practices and continuous improvement.
• Collaborate with Software Engineers, Test Engineers, Product Managers, Technical Program Managers, and other stakeholders to deliver customer-focused solutions.
• Troubleshoot complex production and performance issues, improve system reliability, and mentor engineers by sharing technical knowledge and best practices.

• Proven experience developing enterprise-scale software applications as a Software Engineer, Senior Software Engineer, or Full-Stack Engineer.
• Extensive experience developing enterprise applications using Core Java, Spring Framework, Spring Boot, RESTful APIs, and microservices.
• Strong full-stack development experience, including modern UI development with Angular and backend development with Java…