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.
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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?
- We work with a hybrid model
- Starting financial aid so you can equip your workspace at home
- Allowance and telework subventions
- Adaptable 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.




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.
NN Netherlands is the head office of NN Group, a financial services group with over 180 years of history, helping people care for what matters most to them.
We are committed to the financial, physical, and mental well-being of our colleagues and customers – through our products, services, and meaningful advice.
Benefits of working for NN Group Netherlands
- Continuous development – Your career progression matters.
- We support you with a wide range of learning opportunities and a generous training budget to help you reach your full potential.
- Meaningful impact – At NN, we invest our time and expertise in making a meaningful difference – for people and the planet.
- Purpose-driven work is part of our DNA.
- Work-life balance – Vitality is key.
- Our diverse health and well-being offerings help you stay energised and balanced, both at work and beyond.
Diversity & Inclusion
Our approach to diversity and inclusion is simple.
It is about embracing everyone.
Our networks play a crucial role in achieving our D&I; goals.
They aim for meaningful change and create many opportunities to engage, connect and support colleagues.
Everyone at NN can take an active part in multiple networks including NN Pride, NN Cultural Diversity Network, NN Young Professionals, Woman in Leadership Network and NN Neurodiversity network. xqbhyrx
Top Employer We are proud to be certified as a Top Employer for the 15th year in a row in 2026. The Top Employers Institute certificate recognizes organizations that consciously choose to put their employees first.
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📌 Senior QA Engineer (Madrid)
🏢 NN Digital Hub Iberia
📍 Madrid