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 Principal Software Engineer, Software Engineering Principal Software Engineer – File Transfer About the Role We’re looking for a Principal Software Engineer to help design, build, and operate Mastercard’s File Transfer platforms, which move critical data securely and reliably between Mastercard and its customers worldwide. This is a senior individual contributor role for an engineer who enjoys solving complex platform problems, shaping technical direction, and raising engineering standards across teams—without people management. What You’ll Do Design and build secure, scalable, and highly reliable services that power large‑scale file and data transfer. Set technical direction and influence architecture across multiple teams and services. Lead by example through hands‑on coding, design reviews, and technical mentoring. Drive end‑to‑end service ownership, including performance, reliability, and operational readiness. Identify and fix systemic issues, technical debt, and anti‑patterns to continuously improve platform quality. Partner closely with Product and Operations to deliver features and resolve production issues quickly and effectively. What We’re Looking For Deep experience building production‑grade software in complex, distributed systems. Strong technical judgment and the ability to simplify and improve large, existing platforms. Comfort working across the full lifecycle: design, build, deploy, operate, and improve. A collaborative mindset—you influence through expertise, not authority. Experience with platforms involving secure data movement, integrations, or high‑reliability services is a strong plus. Why This Role You’ll work on mission‑critical systems, solve real scale and reliability challenges, and have a meaningful impact on how Mastercard moves data globally—while helping teams around you become better engineers. 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.