Senior Software Engineer (SDET)
Core
Senior SDET designing scalable automation strategies and validating AI-powered agentic applications, LLM workflows, and platform reliability.
Role type
Senior IC Software Engineer in Test (SDET)
Builds
Production-grade automation frameworks, CI/CD quality gates, and test strategies for intelligent agent-based systems.
Domain
Payments / AI & Agentic Systems
Deliverable
production ML models | product features
Required skills
Java, Python, API/UI automation (Playwright, Selenium, Cypress, REST Assured), CI/CD integration, distributed systems testing, Agile/Shift-left testing
Preferred skills
LLM testing, agent orchestration validation, observability, performance testing, service virtualization
Technologies
Playwright, Selenium, Cypress, REST Assured, Java, Python
Responsibilities
Design and maintain robust automation frameworks for UI, API, and system-level testing; Define test strategies for AI and agent-based systems including workflow validation and guardrails; Build automated quality gates for CI/CD pipelines; Partner with engineers and data/AI teams to ensure quality from design to production; Create test data and validate edge cases for agentic applications; Evaluate non-functional characteristics like performance and resilience.
Seniority
Senior, hands-on IC (via careerplan.io/jobs/R-280269-senior-software-engineer-sdet-at-mastercard)
