Senior SDET: AI-Powered QA Engineer

Mastercard; Bray (OK); On-site; USD 120,000 - 180,000; Full time

Job summary

Mastercard is seeking a Senior Software Engineer in Test (SDET) to design and implement automation for AI-powered and agent-based systems. This hands-on role blends software engineering with advanced test automation to ensure quality across APIs, UI, and platform services.

You will lead end-to-end testing, build scalable automation frameworks, and define test strategies for non-deterministic workflows while collaborating with engineers, product teams, and data/AI squads to raise release

Qualifications

• Experience with test automation and framework design.
• Ability to test modern distributed systems, APIs and UI.
• Experience validating AI-enabled or agentic applications.
• Familiarity with Agile, CI/CD, and shift-left testing.

Responsibilities

• Own end-to-end quality engineering for agentic apps, intelligent workflows, APIs, UIs and 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, reliability and guardrails.
• 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 embed quality from design to production.
• Create meaningful test data, validate edge cases, identify defects early, drive root-cause analysis to resolution.
• Evaluate non-functional characteristics such as performance, reliability, observability, resilience, and scalability.
• Contribute ideas to improve testability, developer productivity, release confidence, and engineering excellence.
• Demonstrate ownership by identifying gaps and mentoring team members on automation 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 design and implement automation for AI-powered and agent-based systems. This hands-on role blends software engineering with advanced test automation to ensure quality across APIs, UI, and platform services.

You will lead end-to-end testing, build scalable automation frameworks, and define test strategies for non-deterministic workflows while collaborating with engineers, product teams, and data/AI squads to raise release