Software Developer

Senior Software Developer Are you an experienced software developer who enjoys combining hands‑on coding with technical ownership and coaching others? Do you want to work on business‑critical systems that truly matter in daily operations? We are looking for a Senior Software Developer who not only builds high‑quality software but also contributes to the growth of the team. In this role, you will have real impact on architecture, code quality, and the future direction of our internal products, while helping junior developers grow into strong professionals.

About Wispex Founded in 1995 as a family‑owned business, Wispex specializes in the handling of customs clearances and transit documentation for a wide range of clients. With a dedicated team of experienced customs brokers, transit specialists, and support staff, we ensure the timely and professional processing of various customs declarations across the Netherlands, Belgium, Germany, and the United Kingdom. As an active member of Fenex, we closely follow the latest developments in customs regulations and continuously adapt our services accordingly. Our rapidly growing client base includes both small and large, nationally and internationally renowned logistics service providers, importers, and exporters.

Our Company Culture Although we are not physically involved in the logistics operations, we fully understand the critical role our services play within the logistics chain. Our “24/7 mindset” ensures that our clients’ shipments run smoothly around the clock. Our fast‑growing customer base ranges from small to large national and international logistics service providers, importers, and exporters. You play a key role within this client base and our organization. As our client portfolio continues to expand, so does our organization. Offering ample opportunity for your own ideas, initiative, and contribution.

Your role as Senior Software Developer As a Senior Software Developer, you are responsible for designing, developing, implementing, and maintaining robust software solutions that support complex, business‑critical processes. You take full ownership of the applications you build, ensuring quality, continuity, security, and maintainability. This includes long‑term maintenance, stability, and continuous improvement. We are currently transitioning from Windows‑based applications to modern, web‑based solutions, while maintaining and improving a complex legacy landscape that is essential to daily operations. You will work on software that is used every day, where correctness, reliability, and deep domain understanding are crucial. In addition to your technical responsibilities, you play an active coaching role within the team. You support junior developers through knowledge sharing, code reviews, and constructive feedback, helping to raise the overall technical maturity of the team. You collaborate closely with the Tech Lead, fellow developers, and IT stakeholders, and report to the IT Manager.

Your Tasks And Responsibilities

Design, develop, test, and maintain software applications that support business‑critical processes

Help decouple the existing codebase through API layers and clear architectural separation

Translate business needs into sustainable, scalable technical solutions

Support the Tech Lead in technical decision‑making

Conduct code reviews and provide constructive feedback

Coach and mentor junior developers

Improve code quality, structure, and development best practices

Contribute to refactoring and technical improvements

Document systems and infrastructure to ensure knowledge continuity

Resolve complex technical or user‑related issues

Participate actively in scrum ceremonies, providing technical insight and helping the team refine processes

What do you bring to the table? You have 5–8 years of experience as a software developer and operate at a bachelor’s level, demonstrated through your education and/or relevant professional experience. You have experience or a strong interest in designing layered architectures, such as the separation of UI, APIs, and business logic. You have proven experience working with junior developers and can analyse complex problems, translating them into clear, practical solutions. With patience, strong communication skills, and a pragmatic mindset, you combine high quality standards with a strong sense of ownership and responsibility for both software and outcomes. You are proactive, reliable, and team‑oriented.

Required:

Strong experience with C# / .NET.

Nice to have:

Experience with WPF, web applications, backend services, or Blazor; familiarity with Scrum, CI/CD pipelines, and version control; experience with legacy codebases and API‑based architectures; and exposure to regulated or process‑driven environments, such as logistics or customs.

What do we offer?

A competitive salary based on experience

25 days of annual leave based on full‑time employment.

A dynamic, international, and informal working environment.

External training opportunities for both professional and personal development.

Attractive secondary benefits, including a bicycle scheme, travel expense reimbursement, and a non‑contributory pension plan.

A team where knowledge sharing and craftsmanship are central

A role with real influence on code quality, architecture, and team growth

Close collaboration with the Tech Lead and IT Manager

Interested? You can apply by clicking the "Apply" button below. We will inform you if you have been selected for the first interview round. If you have any questions about this vacancy, please contact sollicitatie@wispex.nl. Your contacts for this vacancy is Davy Monteiro.

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