Senior SDET: Build Next-Gen AI-Driven QA Platforms

Mastercard; Blackrock; On-site; EUR 80,000 - 110,000; Full time

Job summary

Mastercard in Ireland seeks a Senior Software Engineer in Test (SDET) to own end-to-end quality for agentic applications and AI-powered workflows. You will design and implement automation for UI, API, and integration tests, and contribute to platform reliability in production.

We value deep automation expertise, strong software fundamentals, and collaboration across engineering and data/AI teams. Join a global leader building secure, scalable testing practices and driving quality across releases.

Qualifications

• Strong experience in software test automation and automation framework design.
• Proven ability to test modern distributed systems, APIs, event-driven architectures, and user-facing applications.
• Experience validating AI-enabled or agentic applications, including prompt/workflow validation, output quality assessment, and scenario-based testing.
• Strong understanding of Agile development, shift-left testing, CI and CD practices.
• Comfortable working across ambiguity and applying innovative thinking to solve quality challenges.
• Strong communication, collaboration, and stakeholder management skills, with accountability.

Responsibilities

• Own end-to-end quality engineering for agentic applications, intelligent workflows, APIs, UIs and platform services.
• Design, develop, and maintain robust automation frameworks for UI, API, integration, regression and system testing.
• Define test strategies for AI and agent-based systems, including workflow validation and reliability.
• Build automated quality gates for CI/CD pipelines and ensure high-confidence releases.
• Partner with software engineers, product managers, architects and data/AI teams to embed quality from design to production.
• Create meaningful test data, validate edge cases, identify defects early and drive root cause analysis.
• Evaluate non-functional characteristics such as performance, observability, resilience and scalability.
• Contribute innovative ideas to improve testability and release confidence.

Skills

Java

Python

Automation Frameworks

CI/CD

LLM testing

Distributed systems

Test data management

UI/API testing

Tools

Playwright

Selenium

Cypress

REST Assured

Job description

Mastercard in Ireland seeks a Senior Software Engineer in Test (SDET) to own end-to-end quality for agentic applications and AI-powered workflows. You will design and implement automation for UI, API, and integration tests, and contribute to platform reliability in production.

We value deep automation expertise, strong software fundamentals, and collaboration across engineering and data/AI teams. Join a global leader building secure, scalable testing practices and driving quality across releases.