Senior C++(MFC)/.NET Developer

Kwadijk – hybrid / 32-40 hours About the role Are you an experienced developer who is captivated by complex software development challenges and do you enjoy working at the intersection of legacy and modern technologies? Are you interested in making an impact in healthcare with software that is used by thousands of users daily? Then this might be your next step. For Vertimart, we are looking for a Senior C++(MFC)/.NET Developer who, together with the development team, will work on Exquise Classic: a critical application for the practice management of dental practices in the Netherlands and beyond. In this role, you will work with a large and technically complex C++/MFC codebase while simultaneously contributing to modernization with modern .NET technologies like C# and WPF. You will enter an environment where technical depth, collaboration, and ownership are paramount. What will you do? As a Senior C++(MFC)/.NET Developer, you will be responsible for supporting, improving, and modernizing Exquise Classic. You will navigate seamlessly between existing legacy architectures and modern development tasks, acting as an important knowledge carrier within the team. In addition: • You will work with a large C++ (MFC) codebase with complex business logic • You will tackle bugs, performance issues, and technical challenges • You will contribute to the gradual modernization to .NET (C# / WPF) • You will work with Btrieve/Pervasive SQL and other database file systems • You will develop and maintain integrations with external parties such as insurance companies, billing platforms, and X-ray software • You will be involved in license and supply chain management for hundreds of dental practices • You will participate in discussions about the architecture, stability, and future-proofing of the application • You will actively share knowledge with colleagues about both legacy code and modern technologies • You will work closely with other developers in a tight-knit development team Who are you? You are a developer who is not intimidated by complex systems and who gets energy from technical depth. You are interested in truly understanding existing software while simultaneously contributing to modernization and innovation. In addition: • You have a working and thinking level of HBO/WO • You are proficient in Dutch, both written and spoken • You have at least 5 years of experience developing in C++ • You have experience developing in .NET (C#) • You have experience developing Windows desktop applications (Win32 API / MFC is a big plus) • You have experience with legacy modernization projects • You have experience with databases and SQL • You have experience with COM/Interop between C++ and .NET • You have experience integrating with SOAP/REST APIs Furthermore, you recognize yourself in the following qualities: • Analytical strong • Precise and quality-oriented • Eager to learn • Communicative • Independent AND team player • Ability to explain complex material clearly What do we offer? A technically challenging role within a stable organization An attractive salary that matches your experience, expertise, and responsibilities. A unique combination of legacy software and modern technologies Plenty of opportunities for technical deepening and development Work on software that directly impacts healthcare in the Netherlands An informal, close-knit, and enthusiastic development team Plenty of freedom and flexibility in your work Possibility for hybrid working Flexible working hours and a working week from 32 hours Good employment conditions, including a bonus scheme Pension without personal contribution Company laptop Opportunities for training and certification Weekly sports session with colleagues, guided by a personal trainer Who are we? Vertimart has been developing software solutions for the dental sector for over 40 years. With Exquise, we support thousands of healthcare professionals daily in managing patient records, planning, billing, and practice management. At Vertimart, we combine technical innovation with short decision-making chains, an informal culture, and plenty of room for your own initiative. We believe in collaboration, knowledge sharing, and creating sustainable software solutions that truly make a difference in healthcare. Application process The application process consists of several interviews. In the first instance, you will get acquainted with Chenara Vischer by telephone. Subsequently, you will meet with the manager and/or direct colleagues from the development team. After that, there will be an in-depth technical interview where we will discuss your experience with C++, .NET, and software development in complex environments in more detail. Additionally, we may invite you for a day to give you and us a good impression of the collaboration, codebase, and technical environment. A Certificate of Conduct (VOG) is required for this position.