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Senior Backend Developer (Node.js)

Weesp, Hybrid
Full or part-time
Permanent employee

Your mission

At VeiligWerk, safety comes first. Our mission is to help construction companies prevent accidents and protect their people. With our software, workers can easily report incidents and unsafe situations, organize toolbox meetings, run inspections, and more. Today, over 200,000 construction professionals across the Netherlands rely on our platform, with clients including Heijmans, Dura Vermeer, Boskalis, and TBI.


We’re a dedicated team of 15 in Weesp. As part of Pro4all, we combine our focus on safety with the strength of shared integrations. After a full frontend rebuild, we’re now focused on backend-heavy product development and are looking for a backend developer to help us scale further.

What you’ll do

  • Build and improve backend services in our domain-driven microservice architecture (Node.js, Express, RPC, MariaDB)

  • Develop APIs and integrations, including connections within the Pro4all ecosystem (e.g. shared login/SSO)

  • Improve data models, queries, and indexing to keep the platform fast and reliable

  • Contribute to observability, security, and maintainability as we continue our Kubernetes migration

  • Work with the team to deliver features that make construction sites safer

Our stack

  • Backend: Node.js, RPC-style microservices, MariaDB

  • Infra: Bare-metal Linux, migrating to Kubernetes

  • Frontend: React (TypeScript), Bootstrap, Redux

Your profile

  • At least 3+ years experience with Node.js and MariaDB/MySQL at scale.

  • Proven ability to design and operate service-oriented systems with clear boundaries.

  • A great communicator who enjoys collaborating in a tight-knit, on-site team.

  • Professional proficiency in English; Dutch is a plus.

  • Someone residing in the Netherlands.

Why us?

  • Small team where you can make a real impact.

  • Mission with purpose: help reduce accidents in construction.

  • Friendly, low-ego, on-site culture in Weesp with fast feedback loops.

  • A competitive salary, pension plan, 25 holidays, travel allowance.

Interesse?

Are you ready to be part of our adventure and help transform the construction industry? Then apply now – or if you have any questions, feel free to give us a call on 020-2170628 and ask for Niels van Rijn.

“If you are looking for a company that is an IND sponsor, unfortunately we are not the right fit.”

About us

20 years ago at Pro4all, we embarked on a challenging mission: to digitise construction. Why? Because we saw that, despite all good intentions, costly mistakes were being made and materials unnecessarily wasted. Thanks to our software, construction companies can now work together more efficiently, build more sustainably and possibly even contribute to solving the housing shortage. Our products are used daily by tens of thousands of professionals working in the construction industry.

But note that we are not just another software company. We are a team of passionate tech enthusiasts with years of experience. We believe digitalisation is the key to our customers' success. We want to move the (often conservative) construction industry and show that building can be easier (and more fun). Our solutions have contributed to the largest (and smallest) projects in the Netherlands and abroad such as: Amare, Coolblue and Schiphol Airport.