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:
Mastercard’s Mastercard Checkout Services team is seeking a Senior Software Engineer to join our team. This role involves collaborating closely with product and business stakeholders, owning delivery across the software development lifecycle, driving automation, integration efforts, and mentoring team members. You will contribute to building secure, scalable, and high-performing systems while enhancing the customer journey and operational excellence.
This is a hybrid position based in New York, NY requiring three days per week onsite.

Role:
• Own the end-to-end delivery of complex features and services, including architecture, development, testing, deployment, and documentation.
• Design and implement scalable, secure, and high-performance solutions, driving technical excellence across the stack.
• Participate in team prioritization discussions with Product and Business stakeholders.
• Automate the build, operation, and run aspects of software.
• Lead code, design, and process trade-off discussions within the team as needed.
• Report status and manage risks within the primary application or service area.
• Drive integration of services with a focus on customer journey and experience.
• Conduct demos and acceptance discussions with Product Owners.
• Understand operational and engineering challenges, and proactively work to improve experience and key performance metrics in the area of ownership.
• Develop a comprehensive understanding of end-to-end technical architecture and dependent systems.
• Champion the adoption of technology standards and opinionated frameworks; review code, tests, and automation created by team members.
• Mentor and support junior or less-experienced team members.
• Identify opportunities to streamline processes and eliminate inefficiencies.
• Share and seek knowledge within the Guild or Program to promote reuse of patterns, libraries, and best practices that enhance productivity.

All About You:
• Extensive experience as a full-stack Software Engineer or Software Developer in a fast-paced, collaborative environment.
• Proficiency in writing secure code using Java.
• Familiarity with secure coding standards and vulnerability management.
• Solid understanding of foundational engineering principles for secure, reliable, and scalable systems.
• Experience working with operating system internals (Windows, Linux) to develop efficient code.
• Strong debugging and troubleshooting skills, including analyzing core/heap/thread dumps.
• Familiarity with Git-based workflows and peer review processes.
• Experience with Test-Driven Development (TDD) and Behavior-Driven Development (BDD).
• Understanding of advanced design patterns (e.g., MVC, API Gateway, Dependency Injection).
• Experience designing, building, and cataloging APIs with a focus on reusability and commercialization.
• Ability to apply the Test Pyramid concept: unit, contract, and integration testing.
• Experience using code quality tools (e.g., Sonar, Zally, Checkmarx) to maintain high standards.
• Ability to track and improve delivery metrics (e.g., velocity, lead time, defect leakage).
• Skilled in documenting requirements and ensuring definition-of-done is met.
• Experience in regression, performance, deployment, and release testing.
• Ability to conduct product demos and manage product acceptance processes.
• Strong understanding of customer journeys and driving high availability and performance (e.g., 99.95% uptime).
• Experience working in an Agile development environment.
• Excellent verbal and written communication skills, with the ability to articulate complex ideas clearly and concisely to both technical and non-technical stakeholders.
• Strong analytical and problem-solving abilities, with a focus on improving processes to accelerate delivery, foster innovation, reduce costs, and improve quality.
• Bachelor’s degree in Computer Science, Engineering, or a related field. Equivalent practical experience will be considered.

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 futur