Test Engineer II: AI-Driven API & Pega Workflow Testing

Slashhash; Amsterdam; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

Booking.com in Amsterdam is seeking a proactive Test Engineer II to join the CS SES testing team. You will test Pega customer service workflows from an agent perspective, drive risk-based testing, and build deterministic test automation for APIs and backend services.

The role emphasizes AI-driven testing methodologies, strong test design, and a coaching mindset to mentor peers. You will collaborate with cross-functional squads and advocate for early testability to ensure quality across

Qualifications

• Strong test design and automation experience.
• Backend/API and frontend testing skills.
• Experience with AI/LLM testing and risk-based testing.

Responsibilities

• Independently execute test design, risk-based testing, and quality practices from initial design to release within cross-functional Agile squads.
• Guide teams to make features testable early, advocating for isolated verification, shift-left testing, and sustainable root cause analysis.
• Build and maintain deterministic, fast-feedback test automation for APIs and backend services using tools like Rest Assured, Playwright, or Postman.
• Test and validate end-to-end Pega customer service workflows from an agent perspective while integrating non-functional checks (performance, accessibility, security, or resiliency).
• Explore, implement, and test AI features and LLM models within testing workflows (e.g., using Claude Code or similar frameworks).
• Coach and mentor less experienced test engineers on testing best practices, testability, and continuous quality improvements.
• Collaborate closely with cross-functional squads and partner teams to communicate quality trade-offs clearly to both technical and business stakeholders.

Skills

Test design

Test automation

API testing

Backend testing

Front-end testing

Low-code platforms

Playwright

Rest Assured

Postman

AI/LLM model testing

Claude Code

Risk-based testing

Exploratory testing

Non-functional testing

Observability

Job description

Booking.com in Amsterdam is seeking a proactive Test Engineer II to join the CS SES testing team. You will test Pega customer service workflows from an agent perspective, drive risk-based testing, and build deterministic test automation for APIs and backend services.

The role emphasizes AI-driven testing methodologies, strong test design, and a coaching mindset to mentor peers. You will collaborate with cross-functional squads and advocate for early testability to ensure quality across