Fullstack Engineer at Shared Business Services (Freelance)

NN Personeel B.V.; Den Haag; Hybrid; EUR 96,000 - 138,000; Full time

Benefits offered by this job

Competitive hourly rate

Hybrid work model

International environment

Job summary

NN Bank’s Shared Business Services (SBS) team is seeking a freelance software engineer to help build and maintain critical functionality across NN Group’s departments. You’ll work with Node.js, TypeScript and AWS, expanding capabilities in pre-existing applications while ensuring security controls are documented and compliant.

The position is hybrid, with office days in The Hague and Rotterdam, for five months.

Qualifications

• 5+ years of experience in software development.
• Strong proficiency in full-stack development with TypeScript and Node.js.
• Experience with AWS services (Lambda, SQS, SNS, DynamoDB) and serverless architectures.
• Familiarity with Azure DevOps pipelines is a plus.
• Excellent communication skills in English (B2+).

Responsibilities

• Leverage Node.js, TypeScript and AWS to build or expand functionality in existing applications.
• Ensure compliance and security controls are implemented and documented.
• Contribute to product discovery, system design and stakeholder management.
• Support operations monitoring and observability efforts.

Skills

Full-stack development

Node.js

TypeScript

AWS

English (B2+)

Tools

AWS Lambda

SQS

SNS

DynamoDB

Azure DevOps

Job description

Have you ever imagined making an impact across all business lines at NN Bank? Join our Shared Business Services (SBS) team and help shape the future of our technology landscape. At the Shared Business Services team, we build and maintain critical functionalities needed in many of or our departments and deliver them as a service. Our team plays a key role in NN Bank’s strategic pillars of standardisation and simplification, delivering critical services that support multiple departments. If you get energized by building modern green-field solutions and ensuring robust security, this assignment is for you. You’ll gain hands‑on experience with NN’s modern tech stack, including serverless AWS solutions, TypeScript, Lambdas, and Step Functions.

What you are going to do

Your primary focus will be leveraging technologies and tools like Node.js, Typescript, AWS to create new solutions convert/expand functionality in pre‑existing applications —ensuring compliance and security controls are implemented and documented. The team owns just a few services, most of them written in Typescript (some in Python) and using serverless solutions in AWS, with Lambdas and Step Functions.

As a freelance engineer, you are expected to work independently and contribute to the team in all the aspects of software development that surround build and maintaining a product.

So, you should be comfortable doing:

• Product discovery
• stake holder management
• system design
• operations monitoring
• security controls
• etc.

What we offer you

Our people are the driving force behind our organisation. We value the knowledge and expertise you bring. We believe that your temporary commitment can take our organisation to a higher level.

• Competitive hourly rate depending on your knowledge and experience ASAP for the duration of 5 months
• Hybrid way of working, partly from home and partly from the office
• International working environment with loads of knowledge sharing

Who you are

You are a curious, eager-to‑learn engineer who thrives in Agile environments and enjoys solving complex challenges. You also bring:

• 5+ years of experience in software development and strong proficiency in full‑stack development with TypeScript, Node.js
• Solid experience with AWS (Lambda, SQS, SNS, DynamoDB etc)
• Mature in the full software life cycle (product discovery, CI/CD pipelines, observability, configuration management, compliance etc)
• Experience with Azure DevOps pipelines is a plus
• Excellent communication skills in English (B2+)

Who you will work with

You are going to be part of a small team composed by two experienced software engineers and a Product owner. On Monday you will work at the office in The Hague and on Wednesday you will work from our Rotterdam office. By the nature of the centralized solutions we create for NN Bank, you will interact with many other colleagues in different departments. Specially with other engineers and architects. As all our tech departments are international with English being the main language.

Any questions? Do you have any questions about the job or the procedure? Please contact Beau de Jong, [e-mail].

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.

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.