Jobs in the Netherlands, in English.
33,000+ live jobsMedior Back-End Developer
Hybrid in Eersel·Full-time·Added 2 days ago (last checked 28 Oct)
Our summary
- Salary
- €3,500 - €5,000 a month
- Work mode
- Hybrid, Eersel
- Contract
- Full-time
- Languages
- Dutch
- Experience
- 3+ years





Skills
This job advert was originally written in Dutch.
Requirements
What we're looking for
Minimum HBO (Higher Professional Education) working and thinking level, preferably in the field of Computer Science;
3 to 6 years of experience as a back-end developer in a PHP environment;
Experience with API design, versioning, and integrations with external systems;
Knowledge of database design, migrations, and performance optimization;
Experience with (micro)services architecture and container technology such as Docker;
Insight into caching strategies (Redis, Memcached) and message queues (RabbitMQ);
Experience with CI/CD pipelines, load testing, monitoring, and security best practices.
Pay & benefits
What you'll get
Salary: €3,500– €4,500 gross per month based on a full-time work week, depending on your knowledge and experience.
Time off: 28 vacation days per year with full-time employment.
From digital to close by: four times a year you meet your Portuguese colleagues, twice in Porto and twice in the Netherlands;
Pension: A pension scheme with a 10% employer contribution.
Well-being: A vitality scheme of €25 net per month and extra benefits via a.s.r. Vitality.
Development: Plenty of room for personal development. As part of Visma, you also get access to development opportunities such as specific training, events, and professional networks.
Other: An inspiring workplace in Eersel, a close-knit and sociable team with a strong sense of "we." On Fridays, we stop an hour early and ring in the weekend together with a cozy Friday afternoon drink.
The role
Do you want to not only write code, but also think along about how a platform remains scalable, fast, and future-proof? As a Medior Back-end Developer at Nmbrs Invoicing, you will build the APIs, services, and integrations that thousands of entrepreneurs rely on every day. You will be given the space to make technical choices and have a real impact on our product.
Time to grow. Time to thrive.
We are Nmbrs. We create smart business software that removes unnecessary complexity for SME entrepreneurs and the professionals who support them. Nmbrs brings together four established product organizations—Payroll, Accounting, Invoicing, and Reporting—with teams in the Netherlands, Sweden, and Portugal.
We are one brand with a shared ambition, while we continue to work from the expertise and strength of our own organizations. We bundle our strengths where it makes sense and keep teams, expertise, and decision-making close together.
For this position, you will be working at Nmbrs Invoicing in Eersel. You will work closely with your direct colleagues at this location and simultaneously be part of the broader Nmbrs organization.
What you'll do
As a Medior Back-end Developer at Nmbrs Invoicing, you are responsible for the technical foundation of our product. You design and build APIs and services, ensure our databases remain lightning-fast, and connect our platform to external systems. You work in sprints alongside the product team and our Portuguese colleagues, and actively contribute ideas regarding the technical direction of our platform.
Your role
Specifically, you will:
Building APIs & Services: You design and develop APIs and services that are stable, secure, and highly scalable;
Realizing Integrations: You build and maintain connections with external services and third-party APIs;
Optimizing Performance: You optimize databases and queries and monitor the performance of our platform, so that everything remains fast and reliable;
Safeguarding Quality & Sharing Knowledge: You perform code reviews and mentor junior developers in their growth;
Building the Future: You contribute to architectural decisions and to our technical roadmap.
Your impact
With your work, you ensure that thousands of entrepreneurs can invoice without worries every day. You build the technology that you do not see, but which makes everything possible.
Imagine: we want to add AI recognition for purchase invoices. You help determine how that fits into our architecture, build the necessary APIs, and ensure that everything runs smoothly even under high load. Do you encounter slow or outdated code during this process? Then you bring it up to our new standards.
With thoughtful choices, sharp code reviews, and the mentoring of junior colleagues, you ensure that our platform is ready for tomorrow's growth.
Your profile
You are analytical, structured, and have an eye for quality. You make technical choices independently, can provide sound reasoning for them, and enjoy sharing your knowledge with colleagues.
More jobs like this
or browse Backend·Mid-level·Hybrid·SaaS, Cloud & Developer Tools