C# .net Developer vacatures in Rotterdam

Senior C#/.NET Backend Engineer

• Eneco - Rotterdam

• > 5 years, 1-3 years, 3-5 years

• Software Engineering

• €85.000 - €120.000

Senior C#/.NET Backend Engineer

• Eneco - Rotterdam

• Software Engineering

• > 5 years, 1-3 years, 3-5 years

• €85.000 - €120.000

• Ensure reliable, climate-focused tech with Eneco.

• Shape Tomorrow's Energy Today

• Work in a stimulating environment of our Digital Product Families

Why choose Eneco?

At Eneco, we aim to achieve climate neutrality for both our organization and our customers. Our One Planet strategy supports this goal through advanced digital solutions and innovative technologies. Our VPP tech teams within the short-term trading and operational domain contribute to this mission by developing tools that facilitate continuous energy delivery and optimize trading operations.

What you'll do

As a .NET/C# Engineer, you will contribute to the development and integration of our B2C domain.

You will be working within the core ecosystem that powers our B2C business. Within this landscape, you'll design and build scalable backend solutions, integrate diverse systems through APIs and microservices, and ensure smooth data flows across the value chain. By strengthening this digital foundation, you will help deliver seamless customer experiences, support sustainable growth, and enable innovative services that bring us closer to our climate-neutral goals.

You'll work in a cross-functional product team using a modern stack: .NET/C#, Azure, Kubernetes, Kafka, SQL, etc

Is this about you?

• Solid experience with .NET/C# and backend development
• Understanding of cloud platforms and cloud-native development (Azure preferred)
• Experience with CI/CD, containerization, microservices and event-driven architectures
• Know how to write performant, maintainable, scalable, secure and highly available microservices using best practice design patterns, and technologies like SQL/ NoSQL, gRPC, Kafka, Azure Service Bus and Azure Eventhub
• Based in the Netherlands and fluent in English
• Collaborative mindset and willingness to work across disciplines

Bonus points for

• Experience with observability, SLIs and SLOs
• Knowledge of B2C operations
• Experience within the energy sector

You'll be responsible for

• Developing and maintaining backend services and integrations in .NET/C#
• Designing clean, modular architectures and ensuring system reliability and scalability
• Building cloud-ready services and working with CI/CD pipelines for fast and secure delivery
• Optimizing performance and implementing monitoring solutions for high availability
• Collaborating with frontend developers, testers, and product managers to deliver seamless digital solutions
• Supporting and enhancing the B2C ecosystem
• Contributing to a wider C# Community of Practice
• Mentoring less experienced engineers

This is where you'll work

You will join the B2C team and collaborate with other cross-functional product teams. Your work will directly support Eneco's future B2C tech stack and long-term sustainability goals.

What we have to offer

Personal and professional growth

Eneco is fully committed to help you in your personal and professional development.

Werken bij Eneco is voor iedereen

Work that works for you and the climate

If you decide on a career at Eneco, you are choosing ambition, growth and opportunities. You will have all the space you want to improve yourself and do your job the way that suits you best, which includes having a good work-life balance. You can work to a flexible schedule and work partly from home if your role allows it.

That is how you can work on your own future and on the future of the world. After all, you and your 4,000 colleagues are committed to our mission: climate neutrality by 2035. We assist customers to accelerate their sustainability efforts, devise innovative solutions and seize opportunities with both hands. Are you ready?

The phases of our application procedure