Backend Developer

Permanent employee, Full or part-time · Woerden, Hybrid

Your mission

Your Responsibilities

Design, prototype, and develop backend and middleware components using .NET 8 and C#
Build and maintain secure REST APIs and automation layers to support internal and external integrations
Create and maintain unit and integration tests to ensure code quality and resilience
Implement testable, scalable, and robust software using established architectural patterns
Ensure service reliability with structured logging, distributed tracing, and health checks
Support and guide partners and customers on backend integration challenges
Collaborate in agile teams with architects, developers, and product stakeholders

Your profile

Required Technical Skills

Proficiency in C# and .NET 8 for building distributed backend systems
You routinely integrate AI coding assistants (e.g., GitHub Copilot, Cursor, or equivalents) into your workflow to automate boilerplate, refactors, and tests—shipping faster and writing cleaner code
Strong experience with PostgreSQL or other relational databases
Solid understanding of CQRS, publisher-subscriber, factory, and other key design patterns
Familiarity with dependency injection and modular service architecture
Secure API design using JWT, OpenID Connect, and authentication middleware
Hands-on experience with Swagger/OpenAPI, Polly for resiliency, and Git for version control
Proficient in deploying and operating containerized services with Kubernetes
Experience using Azure Service Bus or other enterprise messaging solutions
Working knowledge of cloud platforms, especially Azure
Familiarity with Datadog, Serilog, OpenTracing, and related observability tools

Why us?

What do we offer you?

A challenging and dynamic role within a growing international software company
The chance to create your own path. 'No' is not something we hear often here; if you have a good idea, you get the chance to execute it.
A company laptop.
A good salary.
25 vacation days and 8% vacation pay.
Reimbursement of travel expenses.
Sports during working hours.
Delicious, daily lunches at the office.
Lots of social drinks, snacks and social activities such as supping, karting and padel tennis.
A beautiful office with excellent accessibility, both by public transport and by car.

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 0348-489600 and ask for Wouter Coebergh.

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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.

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Your application.

How nice that you are interested in becoming our colleague! Digitising construction is a team sport, and we could use some help.

Please fill in the form below and we will get in touch with you. If you have any questions or problems uploading your files, please contact info@pro4all.nl.