Full Stack Developer
Technology Delft (hybrid)
Sping is where innovation and craftsmanship come together. We build applications that solve complex problems for users, with AI as a tool and impact as the goal.
Think of the Heering customer portal, the Waterdrinker B2B e-commerce platform or the AI quote generator for HEBO Maritiemservice.
What you will do
You work on our clients’ applications. That ranges from internal web applications and mobile apps used by our clients’ customers to public platforms. You don’t just build functionality; you also think along about how a product can evolve.
You work on different projects across different industries. Sometimes that is one large project, sometimes a few smaller ones at the same time.
That mix keeps the work varied. One day you are working on the platform’s back-end architecture, the next you are helping a client with a smart integration or thinking about how Sping’s clients can use AI responsibly.
Among other things, you will be:
- developing and maintaining Next.js / NestJS platforms
- building smart integrations, new features and AI functionality
- working on both the front end and the back end of applications
- thinking along about scalability, architecture and features
- collaborating with developers and clients
How you work
You join a team of 7 developers who love to learn and are curious about your ideas. Carsten is our tech lead: he guards the technical direction and is your first sparring partner.

We build with TypeScript, React, Next.js and NestJS, and run our applications in Docker. We have a streamlined way of working, but we are always open to new technologies when they make the work better.
Lines are short and we move fast, and you have room to influence the approach.
We work closely with clients, which means you are sometimes directly involved in technical discussions or decisions.
You work in teams together with designers, developers and the client.
You don’t need to be an AI expert. We are looking for someone who is curious about new technology and enjoys figuring out how things work and how to use them responsibly, in your own work and in solutions for clients.
Who you are (roughly)
You love building. Not just technically, but also products that keep getting better.
You don’t need to be an expert in everything, but you probably recognise yourself in much of this:
- you have at least 3 years of experience as a developer
- you have experience with frameworks such as Next.js / NestJS or similar
- you have experience with JavaScript, TypeScript and React
- you have experience with APIs, web services and version control such as Git
- you find software development genuinely interesting
- you enjoy working in an open source environment
- you are curious about AI
- you like to think along about architecture and technical choices
- you collaborate easily with designers and developers
Nice to have:
- experience with CI/CD
- experience hosting applications
- knowledge of security
What we offer
- A good salary between € 3,500 and € 6,000 gross per month, depending on your level
- 25 days of paid leave based on full-time employment
- A good pension scheme
- No overtime culture
- Your choice of company laptop and accessories
- Travel and work-from-home allowance
- Catered lunch and free fruit at the office
- Flexible working
- Team outings
- A characterful office in a historic building in the heart of Delft
- An office that is easy to reach by public transport and has its own car park
How applying works
- Getting to know each other. We ask what you are looking for, what you bring and what you expect from a workplace.
- Conversations and a trial day. To find out whether we are really a match, we invite you to join us for a day or half day. That way you also experience right away what it is like to work with us.
- Feedback. You hear what we think and what the next step is, as soon as we can.
Dutch or English speaker? Both are welcome.
Why this role suits you
You don’t just want to build software, you want to see what it delivers. You get energy from technology and from working with people. And you are curious about what AI can mean, in your own work and in solutions for clients.
Sound like you? We would love to get to know you. Want to know more about this vacancy or about Sping? Get in touch via +31 88 774 6400 or info@sping.nl.
