Introduction

Nationale Nederlanden Oxygen is a subsidiary company of Nationale Nederlanden Group located in Madrid, Spain. We deliver IT services and solutions for the different international Business Units from Nationale Nederlanden Group

Purpose / Mission

What is the purpose/mission of the position? As a Node.js Backend Engineer, you will have plenty of opportunities to help us take the needed steps to modernise our backend applications, automate and improve on processes. You will work with cutting-edge technologies at one of the largest financial institutions in the Netherlands. Here, you will be uniquely positioned to lead important changes at NN, which aims to become a leading digital retail bank.

What you are going to do?

As our Node.js Backend Engineer, you’ll be evaluating our technological landscape, designing and implementing automation of our processes where possible, investigating, analysing and fixing bugs, integrating systems, running them and others already deployed. And you will also help us create a more tech-driven culture at NN by being an ambassador and helping our teams embrace our new way of working, which marries client centricity with state-of-the-art software.

Main responsibilities

- Defining and evolving the architecture of our solutions
- Developing and maintaining unified solutions incorporating coding standards
- Proactively contributing to Savings, Investments and Bank Assurance’s strategic approach to ensure we are future-proof
- Using software to create best-in-class automation and integrations
- Closely collaborating and aligning with the Engineering Guild and facilitating community contributions
- Taking responsibility as editor-in-chief through code reviews and final decision-making
- Coaching and mentoring other engineers from our and other Domains

Who you are

Experienced in building high-quality software, you can work well with business colleagues and engineers. You are not afraid to speak your mind and you have lots of ideas on how to build a tech-led culture. When it comes to GIT, pipelines, package management and unit/integration testing, you speak the same language as our engineers,



but you may also be able to teach them a thing or two. Furthermore, you have:

Qualifications and skills

- 8+ years of experience in software development as a Node.js backend engineer
- Excellent knowledge of JavaScript/TypeScript
- Excellent knowledge of integration patterns using REST and GraphQL APIs
- Good understanding of CI/CD concepts and a DevOps mindset (“you build it, you own it”)
- Some knowledge of React is a plus

Who you will work with

You will be working in a small cross‑functional Agile scrum team, side by side with engineers and skilled functional maintainers. You will be continually engaging in technical discussions to refine user stories so our customers can enjoy a smoother experience across our channels. Known for its informal culture, this small team is fun and friendly.

What do we offer?

- We work with a hybrid model
- Starting financial aid so you can equip your work space 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.

Diversity & Inclusion

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

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.

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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📌 Backend engineer (Madrid)
🏢 NN Digital Hub Iberia
📍 Madrid