Jobs / Ireland / Mastercard International Incorporated
Senior UI Developer
Mastercard International Incorporated · 🌍 Dublin, Ireland (One South County)
Sponsorship verdict
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- No government sponsor record hereNo government sponsor record covers this employer in this country.
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- Can’t check pay against the visa rulesNo salary stated. Ireland Critical Skills Employment Permit needs at least €40,904 a year (General Employment Permit: €36,605). Source: https://enterprise.gov.ie/en/what-we-do/workplace-and-skills/employment-permits/permit-types/critical-skills-employment-permit/, rules effective 2026-03-01.
- Confirmed live todayWhen a source last listed this job as open.
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Sponsor Radar — Mastercard International Incorporated
No government sponsor record covers this employer in this country.
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About the role
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 UI Developer Overview Mastercard is seeking a UI Developer to join an AI product team building cutting edge foundation model capabilities with enterprise wide impact. You'll design and build the applications that bring advanced AI capabilities to life. Turning powerful, complex model outputs into clear, intuitive, and interactive experiences for the people who rely on them. You will join a team of AI Engineers, Software Developers, Data Scientists and MLOps to bring these capabilities to market. In this role, you will be responsible for the design, development, and maintenance of the platform's frontend applications, spanning both internal tooling and external-facing self-service tools. Key responsibilities: Design and build advanced, interactive visualization tooling for embeddings and model outputs. Including exploratory views of embedding clusters/similarity (e.g., dimensionality-reduced spatial views), interactive drill-down, filtering, and comparison across model/embedding versions. Design and build self-service applications for end users. Including submitting requests (e.g., filter-based embedding generation), tracking job status, and retrieving results, integrating against the platform's API layer. Design and build prototypes for future product versions and executive level demos. Design and build internal tooling for own AI teams, to streamline product advancement. Build and maintain applications on Databricks App hosting, including understanding its deployment model, constraints, and integration points with Unity Catalog and the platform's own APIs. Integrate frontend applications against the platform's API layer, working closely with the Software Engineers to align on contract, authentication, and versioning as the API evolves. Collaborate with Lead Data Engineer and Senior AI Engineer on internal tooling requirements, translating their workflow needs into practical, well-designed interfaces. Own frontend code quality and maintainability. Component structure, testing, and documentation, to a standard consistent with the rest of the engineering team's practices. Design with the platform's varied user base in mind. From highly technical internal AI engineers to product/software teams who may have less context on the underlying model architecture. Contribute to frontend architecture decisions as the platform's application surface grows, including recommending patterns and tooling within what Databricks Apps and the organization's standards support. Support production issues affecting frontend applications, including troubleshooting and coordinating with backend roles when an issue spans both layers. All About You Required skills and experience: Strong, production-level frontend development experience in React, and/or Python-based data-app frameworks (Streamlit or Dash). Component architecture, state management, and building applications meant to be maintained and extended over time, not one-off prototypes. Experience integrating frontend applications against REST APIs. Including handling authentication, asynchronous job patterns (submit, poll/callback, retrieve), and designing around API versioning. Familiarity with visualization libraries capable of advanced/interactive rendering (e.g., D3.js