Software Developer.NET

About the role

For our ICT department at the central offices in Aalst, we are looking for an experienced .NET Software Developer who wants to contribute to the further development of innovative and scalable business software. In this role within the ICT development team, you will work from Aalst on the development and support of critical applications for central services, construction sites, and vessels. You will specialize in modern .NET (Core) C# development, web technologies, and RESTful services, and play a key role in optimizing digital solutions within an international and technically challenging environment.

What you’ll do

At Jan De Nul, our ICT Development team plays a key role in supporting a wide range of dynamic business processes. Through both in-house developed and third-party software, we deliver tailored solutions that meet the evolving needs of the company.

As a .NET Software Engineer within our team of application Developers and Analysts, you will be responsible for the development and support of business-critical software used across our central services, shipyards, and vessels.

Your key Responsibilities:

• Translate and interpret functional specifications with a critical and constructive mindset.
• Provide feedback to improve and refine specifications.
• Write clean, structured, and testable code.
• Leverage existing class libraries and include meaningful comments for clarity and maintainability.
• Follow established design principles, coding standards, and conventions.
• Use modeling languages to understand and implement analyses.
• Continuously build knowledge of the business domain and explore emerging technologies.
• Deliver technical support for developed applications.

You will work from within our centralized ICT- team based in Belgium, Hofstade/Aalst where you can count on a stimulating work environment, a competitive salary, and a comprehensive benefits package — including the option to lease a company car.

What do you need?

As Software Developer, you are passionate about coding and bring a strong foundation in computer science — either through a Bachelor’s degree or equivalent experience. You have at least five years of professional experience in software development. You possess a good knowledge and can speak fluently in Dutch, considered as a prerequisite for this role. You have solid expertise in .NET (Core) with C#, web development frameworks such as Blazor and Angular, and RESTful web services using ASP.NET Web API. You are also proficient in SQL and stored procedures. Experience with offline applications, WinForms, data synchronization, scripting languages (e.g., JavaScript, PowerShell), reporting tools (e.g., Crystal Reports, Power BI), and architectural concepts like Service-Oriented Architecture (SOA) is considered a strong advantage. You are capable of interpreting technical analyses created with modeling languages such as UML.

Why working for us

Working at Jan De Nul means helping to find solutions to some of the biggest challenges of our time: from energy transition to rising sea levels to smart mobility. It means learning and working together every day, with the aim of ensuring the global quality of life for generations to come.

What we offer

• Through the JDN Academy, we offer you a continuous training program.
• Through our FIT program, we support your well-being with a focus on exercise, nutrition, and various team activities.
• A healthy work-life balance (flexible working hours and occasional remote work).
• A permanent contract with 42 paid vacation days (20 legal, 12 ADV* and 10 public holidays).
• An attractive salary with a 13th-month bonus and double holiday pay, including:
  • Meal vouchers and eco vouchers
  • Public transport allowance and bicycle compensation
  • Group and hospitalization insurance
  • Various employee discounts
• The opportunity to make a difference together with your colleagues, in a stable and growing family business.

The world is what you make it Jan De Nul Group shapes water and land around the world, addressing some of the most important challenges of our time. We boost the energy transition with infrastructure for renewable offshore energy. We focus on nature-inclusive dredging solutions to build harbours and protect our coastlines from the rising sea. We develop innovative construction projects for smart mobility and durable buildings. And we invest in planet redevelopment, giving new purpose to polluted sites. At Jan De Nul, the world is what you make it. Jan De Nul Group promotes diversity and inclusion in the workplace. We are an equal opportunities and anti-discrimination employer.

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