Senior UI Engineer - AI Visualization Platform

Mastercard; Ashbourne; On-site; EUR 90,000 - 130,000; Full time

Job summary

Mastercard is seeking a Senior UI Developer to join an AI product team building cutting-edge foundation model capabilities with enterprise-wide impact. You will design and build the frontend applications that translate complex model outputs into clear, interactive experiences for AI engineers and product teams.

You will own frontend development across internal tooling and external self-service tools, with emphasis on React-based interfaces, data visualization, and robust integration with REST

Qualifications

• Strong frontend development experience in React and/or Python-based data-app frameworks.
• Experience building reusable component architectures and maintainable UI.
• Experience integrating frontend with REST APIs including authentication and async job patterns.
• Familiarity with data visualization libraries (D3.js, deck.gl, Plotly) and interactive UX.
• Understanding of Databricks Apps hosting and Unity Catalog integration.
• Ability to design for both technical and non-technical users and work in CI/CD environments.
• Clear communication with backend, data and AI engineers to expose required interfaces.

Responsibilities

• Design and build advanced, interactive visualization tooling for embeddings and model outputs.
• Create self-service applications for end users, including filter-based requests and job tracking.
• Prototype future product versions and executive level demos.
• Develop internal tooling to accelerate AI team workflows.
• Maintain frontend code quality, testability, and documentation.
• Integrate frontend apps with the platform's API layer and ensure secure authentication.
• Collaborate with AI/Data engineers on tooling requirements and interface design.
• Support production issues spanning frontend and backend layers.

Skills

React

UI Design

REST APIs

Data Visualization

D3.js

deck.gl

Plotly

Databricks Apps

CI/CD

Communication

Tools

Unity Catalog

Databricks Apps

Job description

Mastercard is seeking a Senior UI Developer to join an AI product team building cutting-edge foundation model capabilities with enterprise-wide impact. You will design and build the frontend applications that translate complex model outputs into clear, interactive experiences for AI engineers and product teams.

You will own frontend development across internal tooling and external self-service tools, with emphasis on React-based interfaces, data visualization, and robust integration with REST