Senior .NET Developer

Kempen & Co; Amsterdam; On-site; EUR 70,000 - 110,000; Full time

Job summary

Van Lanschot Kempen is looking for a Senior .NET Developer to help build a scalable data foundation for Private Clients. The role focuses on backend development within the Nexus Team and involves working with an Operational Data Store that unifies data from multiple sources.

You will shape the data platform, engage with stakeholders, and drive architectural decisions in a lean Scrum team. A strong emphasis on ownership and proactive problem solving is expected.

Qualifications

• At least 5 years of experience with C# .NET development.
• Strong knowledge of SQL and relational databases.
• Experience building integrations between systems.
• Experience working with Azure-based solutions.
• Affinity for data modelling and complex data structures.
• Strong analytical and problem-solving skills.
• Excellent communication and collaboration with stakeholders.
• Experience working in Agile teams.

Responsibilities

• Design, build and maintain services and applications on top of the Operational Data Store.
• Develop backend functionality and integrations using C# .NET and Azure SQL.
• Help migrate functionality from existing APIs to the new data layer where appropriate.
• Integrate and standardise data from multiple source systems.
• Contribute to the evolution of the data model and platform architecture.
• Work closely with business stakeholders, architects and development teams to understand requirements.

Skills

C# .NET development

SQL and relational databases

Azure-based solutions

System integrations

Data modelling

Agile teams

Communication with stakeholders

Tools

Azure SQL

Job description

As a Senior .NET Developer in the Nexus Team, you will help build the foundation for future digital solutions within our Private Clients business.

The Nexus Team is responsible for developing an Operational Data Store (ODS): a central data platform that brings together information from multiple source systems, standardises it, and makes it available for applications across the organisation. By creating a consistent and reliable data layer, we enable development teams to make better use of data. While this is a Senior .NET Developer role, the focus is primarily on backend development.

This is a highly autonomous role in a lean team. You will not only build solutions, but also help shape the future of the platform. You will work in a complex environment where business processes, applications and data models come together.

We believe that the best solutions come from truly understanding the problem first. That's why we're looking for someone who is curious and enjoys investigating how things work, actively engages with stakeholders, challenges assumptions, and translates complex questions into scalable technical solutions.

Your responsibilities

• Design, build and maintain services and applications on top of the Operational Data Store

• Develop backend functionality and integrations using C# .NET and Azure SQL

• Help migrate functionality from existing APIs to the new data layer where appropriate

• Integrate and standardise data from multiple source systems

• Contribute to the evolution of the data model and platform architecture

• Work closely with business stakeholders, architects and development teams to understand requirements and identify opportunities for improvement

• Investigate complex data and application landscapes and propose solutions that balance business and technical needs

• Take ownership from analysis through implementation

Your talents

As a Senior .NET Developer, you are independent, analytical and proactive. You enjoy working in an environment where not everything is defined upfront and where discovering the right solution is part of the job.

You are someone who wants to understand how things really work. You ask questions, challenge assumptions and are comfortable forming and defending your own view on technical and functional decisions.

In addition, you have:

• At least 5 years of experience with C# .NET development

• Strong knowledge of SQL and relational databases

• Experience building integrations between systems and applications

• Experience working with Azure-based solutions

• An affinity for data modelling and complex data structures

• Strong analytical and problem-solving skills

• Excellent communication skills and the ability to collaborate with both technical and non-technical stakeholders

• Experience working in Agile teams

Move ahead at Van Lanschot Kempen

Investing in a more future-oriented, sustainable, and data-driven way with various clients. Both nationally and internationally. With nearly 300 years of experience, we make this ambition a reality at Van Lanschot Kempen. We do this with more than 2,100 colleagues in various fields of expertise.

Within the Nexus Team you will join a group of senior professionals in a Scrum team with a clear mission: creating a reliable and future-proof data foundation for applications within the Private Clients domain. Because the team is lean, your contribution has a direct impact on the direction of the platform. You will have the opportunity to influence technical decisions, shape solutions, and work on challenges that combine software engineering, architecture, and data. We offer an environment where ownership, curiosity and initiative are valued. Technical expertise matters, but your ability to navigate complexity is what will make the difference.

An organisation's degree of innovation and agility also depends on the diversity of its workforce. Our differences make us stronger together. We promote an inclusive work environment where all colleagues feel at home. With us, you can be yourself. And we are proud of that.

Curious about the stories of colleagues and how they experience working at Van Lanschot Kempen? Go to Podcasts and find out more