Senior Specialist, Design Technologist, Developer Experience

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 Specialist, Design Technologist, Developer Experience
About the Role
Mastercard is evolving how developers discover, evaluate, and integrate our APIs. As the platform grows in scope and complexity, so does the need to move quickly from concept to validation. Today, ideas move too slowly from ideation to a form that stakeholders and users can meaningfully evaluate, and the handoff between design and engineering introduces ambiguity and rework.
This role exists to close that gap. As part of the Developer Experience (DX) team, you will sit at the intersection of design and engineering, rapidly prototyping new features, maintaining design system specifications, and testing concepts with real users before engineering resources are committed. You will work closely with product managers, designers, front-end engineers, and developer marketing to translate strategic bets into tangible, testable experiences. Looking ahead, this role will play a key part in shaping AI-powered capabilities across the developer journey, including intelligent onboarding, personalized API recommendations, and agentic developer tooling.
Responsibilities
- Build high-fidelity, functional prototypes to validate proposed features and experiences before full engineering investment
- Own and maintain design system documentation, component specs, and interaction patterns for the developer portal
- Collaborate with designers and front-end engineers to reduce ambiguity in the design-to-development handoff
- Conduct rapid user testing and iteration cycles to gather signal on proposed features and flows
- Partner with product managers to translate roadmap priorities into prototype-ready concepts
- Contribute front-end code to production when prototypes are approved for implementation
- Stay current on emerging interaction patterns, developer tooling trends, and design technology, including AI-powered interfaces
Qualifications
- 2+ years of experience in design technology, front-end engineering, or a hybrid design-engineering role
- Proficiency in front-end frameworks (React, Next.js, or similar) and prototyping tools (Figma, Framer, or equivalent)
- Experience building interactive prototypes that go beyond static mockups to simulate real product behavior
- Strong understanding of design systems, component libraries, and accessibility standards
- Ability to work fluidly across design and engineering teams with minimal handholding
- Familiarity with AI-powered interfaces, conversational UX, or agentic interaction patterns is a plus
- Experience in developer platforms, API products, or technical B2B products is a plus
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.