Senior QA Engineer

NN Digital Hub is a subsidiary company of NN Group located in Madrid, Spain. We deliver IT services and solutions for the different international Business Units.

Senior QA Engineer

You will be a supporter of change by ensuring the quality, reliability, and performance of digital solutions that positively impact our customers' lives. Through your expertise in quality assurance and continuous improvement, you will help deliver trusted products faster, enabling innovation while maintaining the highest standards. Join us in our offices in Madrid to be part of a highly collaborative project.

Your Impact as Senior QA Engineer: What are you going to do

As a Senior QA Engineer, you will play a key role in delivering reliable, secure, and high-quality APIs that power critical customer journeys across our digital ecosystem. Working closely with developers, architects, and product teams, you will drive quality from the earliest stages of API design through to production release. By identifying risks early, automating validation processes, and providing clear insight into product quality, you will help accelerate delivery while ensuring a seamless and trustworthy experience for our customers.

Key responsibilities include:

• Design, develop, and maintain automated API test frameworks and test suites, ensuring comprehensive validation of functional and non-functional requirements.

• Review API designs, specifications, and user stories early in the development lifecycle to identify quality risks, edge cases, and potential failure points before implementation begins.

• Execute exploratory, integration, regression, and end-to-end testing, providing detailed evidence of successful outcomes and clear documentation of defects, including reproduction steps, impact analysis, and recommendations.

• Collaborate closely with developers, architects, and product owners to define quality standards, acceptance criteria, and test strategies that support reliable and scalable API solutions.

• Analyze test results, production incidents, and quality metrics to drive continuous improvement and proactively prevent defects from reaching customers.

The team you’ll join:

You will join the Mediation Layer team, a diverse and highly collaborative group of more than 20 professionals, including Senior Developers, API Designers, Senior QA Engineers, and other supporting specialists. The team plays a central role in enabling seamless API integration across the organization. We foster an open and supportive environment where colleagues are encouraged to share ideas, challenge assumptions, and help each other solve problems quickly and efficiently.

What do we offer?

As part of our Employee Experience, we offer you a range of competitive benefits that are available to you in order to improve the physical, mental, and professional wellbeing of our workers. Among the benefits are:

• We work with a hybrid model

• Starting financial aid so you can equip your workspace at home

• Allowance and telework subventions

• Flexible working hours and 2 months of intensive working hours in summer so you can fully take advantage of your time

• We hire a life insurance and a pension plan for all our employees

• We establish objectives bonus as a performance reward

• You can get to the office as you please. We have a free parking lot for cars, motorbikes, electric cars with chargers, and bikes.

• Get to know our flexible retribution facilities such as transport card, nursery checks, health insurance with Sanitas, trainings…

• We care about people. That is why we are involved in society by facilitating volunteer actions and time to all our employees.

• We care about your wellbeing. We have a Wellness Program available.

• We are digital and we love technology. Also, every team works under agile methodology.

Who You Are:

• You have proven experience in API testing and quality assurance, with a strong understanding of API architectures, integration testing, and defect management.

• You have experience working in Agile environments and collaborate effectively with developers, architects, and product teams to embed quality throughout the delivery lifecycle.

• You have hands-on experience with test automation, and proficiency in at least one programming language. Experience with Python, Behave, and Gherkin is a strong advantage.

• You are skilled in using tools such as Postman and Azure DevOps to support test execution, test management and defect tracking.

• You are comfortable using AI technologies to support quality engineering activities and continuous improvement.

If you are a passionate and experienced Senior QA Engineer looking for an exciting opportunity to work in a dynamic and challenging environment, we encourage you to apply for this position. We are waiting for you!

Please send your CVs in English language.

In Nationale-Nederlanden we are committed with diversity. We are proud to be an inclusive organization and we offer equal opportunities, regardless of race, cultural background, gender, gender identity, religion, national origin, age, disability, marital status, and sexual orientation. One of our core values is taking care of our employees so they can give their best within a respectful environment.