Senior Fullstack Developer .NET

The salary is between € 5600,- and € 7200,- per month (in addition, you will receive a variable reward, a fixed 13th month, and 8% holiday allowance), depending on your role, competence profile, and experience.

Furthermore, we offer you excellent conditions, including:

• participation in a good pension scheme

• 27 vacation days (based on a full-time contract)

• the possibility to purchase extra vacation days

• Hybrid working from home and the office in Amsterdam (of course, you are welcome to work in the office every day)

• travel allowance for your daily commuting and any business travel

• opportunities to develop yourself with a training program and weekly research and knowledge meetings

• you start with a one-year contract, after which there is a view of a permanent contract, as we strive for a long-term collaboration

• a pleasant working environment with enthusiastic and nice colleagues!

At OrtaX, part of Centric, you will work on software that supports municipalities in executing the WOZ process efficiently, reliably, and transparently. Our ambition goes beyond maintaining existing software. We continuously develop OrtaX and invest in new technology, data, automation, and a future-proof architecture.

As a Senior Fullstack Developer, you will play an important role in this. Naturally, you move between frontend and backend, actively contribute to building new functionality, and simultaneously help to modernize our application step by step.

In doing so, we look explicitly to you to help provide technical direction and structure. Not just by making choices, but precisely by sharpening technical issues, bringing different perspectives together, and arriving at good, supported solutions together with the team.

As a Senior Fullstack Developer, you will work together with developers, analysts, and other specialists on the further development of OrtaX. In this role, you are not only responsible for your own code but also look at the coherence and quality of the solution as a whole.

Your responsibilities include, among other things:

• developing new backend functionality in C#/.NET;

• designing and developing frontend functionality using one of the major frontend frameworks

• designing and improving APIs, integrations, and data solutions;

• creating technical designs that connect frontend, backend, and data;

• writing and encouraging maintainable, testable, and high-quality code;

• contributing to CI/CD, automated testing, and DevOps;

• analyzing complex technical issues and translating them into pragmatic solutions;

• providing technical structure and monitoring the coherence between different parts of the application;

• providing direction for architecture and design choices and making the consequences of different options transparent;

• leading technical discussions and ensuring that the knowledge and ideas of other team members are included;

• supporting fellow developers with complex technical issues;

• identifying and discussing technical debt, risks, and opportunities for improvement;

• modernizing existing parts of OrtaX step by step.

You will work on a mature product in which a continuous trade-off is made between delivering value today and building the architecture of tomorrow.

As a senior developer, you help the team to make that trade-off consciously. Sometimes this means investing in a structural technical improvement, sometimes it means choosing a pragmatic solution that fits the situation.

OrtaX has an existing software landscape as well as a clear modernization task. Because of this, you don't just work on the question: "How do we build this feature?" but also on questions such as:

"How does this solution fit into the rest of our architecture?" "Which choice helps us not only today, but also in a few years?" "How do we prevent different parts of the application from going in their own directions?" And perhaps even more importantly: "How do we, as a team, arrive at a technical choice in which different insights are well-integrated?"

As a Senior Fullstack Developer, you will take the lead in this. You can structure a technical issue, investigate alternatives, and propose a direction. At the same time, you understand that the best technical solution is rarely conceived by one person alone. You actively seek discussion with other developers, listen to arguments, and use the expertise within the team to make the final solution better.

At OrtaX, we use AI as an important tool in the development process. In doing so, we also believe that the developer is responsible for ensuring we deliver good code and a clear architecture. We also want to have a well-maintainable product in the long term. To that end, AI has become an essential tool, but not without input from the developer.

For us, technical leadership therefore does not mean deciding what others must build, but providing direction, providing structure, and helping the team make better technical choices.

We are looking for an experienced developer who truly feels at home on both sides of the stack.

For this senior role, we are therefore not looking for a backend developer who occasionally does frontend work, or vice versa. You do not need to have the same depth everywhere, but you are able to work independently on both frontend and backend and can oversee technical issues across the entire chain. You:

For us, seniority is not just about the number of years of experience or how many technologies you master.

We are looking for someone who looks beyond the boundaries of an individual feature.

You see patterns and dependencies, recognize when a technical choice has consequences for other parts of the system, and provide structure when an issue becomes complex.

Furthermore, you are someone colleagues can turn to when a technical issue gets stuck. Not because you always have the answer immediately, but because you can help to sharpen the problem and arrive at a good solution together.

In addition, you can lead without wanting to decide everything yourself. You provide direction when necessary, but also create space for discussion, other ideas, and the expertise of your colleagues.

OrtaX supports municipalities and partnerships in the WOZ process and focuses on consistent, explainable valuations and smart automation. In doing so, we invest in technologies such as data analysis, AI, automation, and integration. As a result, you will work on software whose social application is very concrete. At the same time, you will enter an environment in which there is still much to develop and modernize technically.

For a Senior Fullstack Developer, this means that you don't just fit into an existing technical environment, but can actually have an influence on how OrtaX develops further technically. You will get the space to provide structure, help make technical choices, and initiate improvements. At the same time, you will stay close to the technology yourself and help build the solutions that result from it.

You will thus receive the combination of a mature product, a substantial technical modernization task, and the opportunity to further shape the technical course together with the team.

OrtaX supports municipalities and partnerships in the efficient, reliable, and transparent execution of the WOZ process. The ambition is to support appraisers with smart automation while simultaneously investing in new technology, process automation, and integration.

In doing so, we work not only on what OrtaX needs today, but also on how the product should look technically tomorrow.

Do you, as a Senior Fullstack Developer, want to not only build OrtaX, but also help determine how we build further? Then we would love to meet you.