Senior Software Engineer

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 Software Engineer

Experience
Minimum 8+ years of hands-on experience in UI / Frontend engineering, building scalable, high-performance, enterprise-grade applications.

Role Overview
We re looking for a senior UI engineer who can own frontend delivery end-to-end, influence architecture and design decisions, and elevate overall engineering standards. You ll collaborate closely with backend teams, UX designers, and product stakeholders to deliver modern, accessible, and high-quality user interfaces.

Key Responsibilities
Design and develop scalable, high-performance UI applications using Angular and React
Drive frontend architecture and technical design decisions for long-term scalability
Build reusable, maintainable, and modular UI components
Collaborate with backend engineers, UX designers, and product teams
Mentor engineers and promote best practices in coding, testing, and design
Lead initiatives around performance optimisation, accessibility, and UI quality
Improve developer productivity, tooling, and engineering workflows

Required Skills
Strong expertise in Angular and React JS frameworks
Deep knowledge of JavaScript, TypeScript, and ES2025 features
Proven experience in building scalable, reusable, and maintainable UI architectures
Strong command of HTML5, CSS3, and modern CSS techniques
Hands-on experience with advanced CSS layouts (Flexbox, Grid, responsive systems)
Experience with modern styling approaches such as SCSS, CSS Modules, Styled Components, or Tailwind CSS
Solid understanding of design systems, component-driven architecture, and UI theming strategies
Good grasp of UI/UX design fundamentals layout, typography, spacing, and visual hierarchy
Ability to convert Figma/design mock-ups into pixel-perfect, production-ready UI
Strong experience with unit testing and TDD/BDD practices
Hands-on expertise in E2E automation using Cypress and Playwright
Familiarity with BDD frameworks (e.g., Cucumber or similar)
Experience with CI/CD pipelines, including Jenkins pipeline automation
Working knowledge of web servers and application deployment principles
Exposure to cloud platforms such as PCF (Pivotal Cloud Foundry)
Experience with state management (Redux, NgRx, RxJS, Context API)
Good understanding of REST APIs and frontend backend integration
Strong focus on performance optimisation, debugging, and rendering efficiency
Experience with responsive design and cross-browser compatibility
Familiarity with WCAG accessibility standards and inclusive UI development
Strong experience with version control (Git) and JIRA for agile delivery tracking
Awareness or exposure to Agentic AI concepts / AI-assisted development workflows
Solid understanding of SDLC and Agile methodologies (Scrum/Kanban)
Experience working on large-scale or enterprise-grade applications

Additional Technical Strengths
Expertise in modern frontend tooling (Webpack, Vite, npm/yarn)
Strong debugging and performance profiling mindset
Experience with responsive, mobile-first development
Good understanding of cross-browser rendering and compatibility issues

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.