Medior/Senior Front-End Developer (.net core)

Introduction

At Yellowtail Conclusion, we develop software that strengthens digital security in one of the most digitized countries in the world: the Netherlands. One of our flagship products, Key Control Dashboard (KCD), enables organizations to manage risks effectively through smart, user-friendly technology.

To keep innovating, we’re looking for a Medior Front-End Developer who enjoys working with front-end technologies. You’ll join a passionate, highly skilled development team based entirely in the Netherlands, contributing to a great platform.

Why This Is Your Next Job as a Medior Developer

• Contribute to our UI transformation. We’re currently migrating our ASP.NET MVC application to .net core Application and front end. As a medior developer, you’ll play an important role in this transition—building new components, refining user flows, and helping shape a clean, maintainable front-end architecture alongside our lead engineer.

• Front-end focus, real impact. Your core responsibility will be developing and enhancing the new UI. You’ll work closely with backend developers, UX designers, and product owner to deliver a smooth and intuitive user experience.

• Innovative environment. We encourage learning and experimentation. Have an idea to improve performance or user interaction? We want to hear it—and help you test it.

• Growth and ownership. You’ll be trusted with real responsibility, contribute to technical decisions, and mentor junior developers as part of a collaborative team.

We truly value your talent and want to support your growth. At KCD, you will have ample learning opportunities and the freedom to discover your strengths.

What We Are Looking For

• A relevant bachelor’s or master’s degree in Computer Science, Software Engineering, or a related field.

• 3–5 years of professional development experience.

• Strong experience with C# and UI / UX development and .net core.

• Somebody open and eager to learn new technologies like Blazor.

• A proactive mindset with strong communication skills in English (Dutch is an advantage).

• Team spirit: you enjoy collaboration, providing constructive feedback, and contributing to a dynamic team.

• Experience working within agile development teams and a solid track record of independently solving technical challenges.

Our Tech Stack

• Front end: .net MVC, jQuery, optionally Blazor or Angular

• Back end: C#, ASP.NET

• Data & cloud: MS SQL Server, Azure