Senior SDET: AI-Powered Automation Engineer

Mastercard; Ashbourne; On-site; EUR 85,000 - 110,000; Full time

Job summary

Mastercard is seeking a Senior Software Engineer in Test (SDET) to lead automation and quality for agentic applications, AI workflows, and platform services in an Agile environment. You will design scalable testing strategies and build robust automation across UI and API layers, ensuring reliable, scalable releases.

The role emphasizes ownership, collaboration with data/AI teams, and a strong focus on modern testing practices, performance, and CI/CD integration.

Qualifications

• Strong experience in software test automation and framework design.
• Proven ability to test modern distributed systems and APIs.
• Experience validating AI-enabled or agentic applications, including prompt/workflow validation.
• Good knowledge of Agile development, CI/CD, and shift-left testing.
• Strong communication and stakeholder management.

Responsibilities

• Own end-to-end quality engineering for agentic applications, intelligent workflows, APIs, user interfaces, and supporting platform services.
• Design, develop, and maintain robust automation frameworks for UI, API, integration, regression, and system-level testing.
• Define test strategies for AI and agent-based systems, including workflow validation, response quality, tool usage, guardrails, reliability, and failure handling.
• Build automated quality gates for CI/CD pipelines and ensure high-confidence releases through continuous testing.
• Partner closely with software engineers, product managers, architects, and data/AI teams to ensure quality is built in from design through production.
• Create meaningful test data, validate edge cases, identify defects early, and drive root cause analysis through to resolution.
• Evaluate non-functional characteristics such as performance, reliability, observability, resilience, and scalability.
• Contribute innovative ideas that improve testability, developer productivity, release confidence, and engineering effectiveness.
• Demonstrate strong ownership by proactively identifying gaps, driving improvements, and mentoring team members on automation and quality best practices.

Skills

Java

Python

Automation

CI/CD

Tools

Playwright

Selenium

Cypress

REST Assured

Job description

Mastercard is seeking a Senior Software Engineer in Test (SDET) to lead automation and quality for agentic applications, AI workflows, and platform services in an Agile environment. You will design scalable testing strategies and build robust automation across UI and API layers, ensuring reliable, scalable releases.

The role emphasizes ownership, collaboration with data/AI teams, and a strong focus on modern testing practices, performance, and CI/CD integration.