Platform Engineering Intern, Summer – St. Louis, MO

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.

Platform Engineering Intern, Summer 2027 – St. Louis, MO, US

Why join Mastercard’s internship program?

Mastercard's internship program offers more than hands‑on work. It provides an opportunity to build skills, expand your network, and make a meaningful impact while working on projects that support business priorities. It provides an opportunity to build skills, expand your network, and make a meaningful impact while working on projects that support business priorities.

About the team:

Are you passionate about technology, architecture, and solving complex problems? Come join our Platform Architecture team and get hands‑on experience with some of the most critical payment infrastructure at Mastercard.

Our team is responsible for designing platform architectures and creating detailed Visio diagrams for complex applications and infrastructure solutions. We work closely with development, infrastructure, networking, security, and operations teams to ensure applications are built on scalable, resilient, and highly available platforms.

A major focus of our work is supporting the Decision Management Program (DMP), a critical component of Mastercard's payment ecosystem. DMP has a significant infrastructure footprint across Mastercard's large in‑house data centers and relies heavily on bare metal server environments. Our team helps design, modernise, and manage these complex platforms that support high‑volume, mission‑critical payment processing.

What makes our team special is the people. We are a fun, collaborative group with team members located both in the U.S. and Pune, India. Our team includes architects at every stage of their careers, from seasoned industry veterans to newer architects eager to learn and grow. This creates a great environment for mentorship, knowledge sharing, and professional development.

As an intern, you'll gain exposure to:

• Enterprise‑scale platform architecture
• Infrastructure and data center design
• Application architecture and dependency mapping
• Visio diagram creation and architecture documentation
• Bare metal and modern platform technologies
• Real‑world payment processing systems
• Collaboration with global engineering and architecture teams

If you're eager to learn, explore complex technologies, and gain experience working on systems that power global payments, we'd love to have you join us. Come learn about DMP, Mastercard technology, and the exciting world of enterprise platform architecture while working alongside a talented and supportive team.

• Currently enrolled in a Bachelors degree, with an anticipated graduation date between December 2027 and June 2028
• Foundational knowledge of cloud computing platforms such as Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP).
• Understanding of infrastructure concepts including high availability, capacity planning, scalability, and micro‑segmentation.
• Exposure to containerization technologies and orchestration platforms such as Docker and Kubernetes through coursework, projects, or internships.
• Familiarity with Infrastructure‑as‑Code (IaC) and automation tools such as Git, Bitbucket, Jenkins, Terraform, Ansible, or Chef.
• Basic knowledge of Java application servers and enterprise…