Test Engineer II

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 is seeking a proactive Test Engineer II to join the Customer Service Software Engineering Services (CS SES) testing team in Amsterdam. The role focuses on testing Pega customer service workflows from an agent perspective, driving risk-based testing, building deterministic test automation for APIs and backend services, and exploring AI-driven testing methodologies. Candidates need strong test design and automation experience, backend/API and front-end testing skills, and a coaching mindset.

Technical (Must-have)

• 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

Soft Skills

• Coaching
• Communication
• Stakeholder management
• Customer mindset
• End-user mindset
• Mentoring

Technical (Nice-to-have)

• Pega product architecture
• Pega workflows

Key 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.

• 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