Senior Quality Assurance Engineer

Who you are

• 5–7+ years of experience in software quality assurance, with a senior-level track record of hands-on testing in the fintech domain
• Strong hands-on manual and exploratory testing skills alongside solid test automation experience
• Strong knowledge of API testing (REST) and microservices/event-driven architectures
• Hands-on experience with test automation frameworks such as Selenium and Playwright with TypeScript
• Proficiency in at least one programming language (Java/Kotlin)
• Understanding of CI/CD pipelines and integration of automated tests (GitHub Actions)
• Practical experience with Postman/Newman, Charles Proxy, and Xray (or similar test management tooling)
• Comfortable validating data consistency across multiple database technologies and asynchronous event flows
• Experience helping establish or mature QA processes within a squad or team
• Experience working in a fast-paced Agile environment
• Excellent communication and collaboration skills with cross-functional teams
• This role reports to the Staff QA Engineer
• Experience with fintech or financial services testing (financial accuracy, transactional data, regulatory compliance)
• Experience with performance and security testing
• Knowledge of financial regulations and compliance standards (KYC/AML)
• Familiarity with event-driven and event sourcing architectures

What the job involves

• We are looking for a Senior Quality Assurance Engineer (Backend) to join our BUX team based in Amsterdam
• Our engineering team sits at the heart of the company
• We have a well-rounded team that cares about building great products that matter
• You'll be part of a modern fintech company where you can try things, break things, fix them, and learn fast
• Your work is visible, your input matters, and you help shape both the product and how we build it
• We stay close to what's happening in the world of investing and fintech, and we share what we learn
• It's a place where you can stretch your skills, contribute to something real, and grow alongside people who take their craft seriously and enjoy building things together
• In a fintech environment, quality is not just about catching bugs; it's about ensuring financial accuracy, maintaining regulatory compliance, and safeguarding our users' trust
• You'll play an active hands-on role in upholding quality across the backend services that power our platform
• As a Senior Quality Assurance Engineer for our App Backend team, your job is to get things done
• Design, develop, and maintain automated tests (integration, end-to-end, regression) for backend REST services
• Execute manual and exploratory testing where automation is not feasible
• Help build and mature QA processes, standards, and definition of done within the squad
• Apply quality gates and acceptance criteria in close collaboration with Product and Development teams
• Participate in design reviews for owned backend features to provide a QA perspective early in the development cycle
• Monitor and track key quality metrics, test coverage, and defect trends for backend services
• Perform bug triage, reproduction, and prioritisation with development teams
• Integrate automated regression, smoke, and integration test suites into CI/CD pipelines (GitHub Actions)
• Support test environment setup, data provisioning, and maintenance in coordination with DevOps
• Use approved GenAI tooling with sanitised data to accelerate test design and automation, subject to human review, security policies, and validation of generated tests
• Our tech stack
• Java, Kotlin, Spring Boot, GCP, Kubernetes, GitHub Actions, REST APIs, Selenium, Playwright/TypeScript, Postman/Newman, Charles Proxy, Xray, CloudSQL, PostgreSQL

The application process

• We usually respond within three days

Benefits

• Work from anywhere in the world for one month per year
• Unlimited 1-on-1 access to on-demand coaching and mindfulness consultations with psychologists through OpenUp
• A supportive environment that encourages continuous learning and development
• Dedicated training budget for to use towards improving current skills or learning something entirely new
• Celebrations - we make sure to do plenty of fun stuff together, like dinner and drinks or activities like flyboarding, rafting and off-road jeep driving