C#/.NET Backend Developer - eMobility (SaaS)

At Deftpower we’re looking for a C#/.NET Backend Developer to join our team.

About Deftpower

At Deftpower, we’re shaping the future of electric charging every single day. Our SaaS‑platform helps businesses across Europe make charging simpler, smarter, and more sustainable. With AI and intelligent software, we make sure charging works seamlessly with the energy grid, creating a greener and more stable system for everyone.

We’re growing fast, thanks to a recent major investment, and there’s never a dull moment! We’re expanding, improving our technology and teaming up with companies in over ten countries.

Our Tech Stack

The Deftpower platform is built in C#/.NET; we are heavily using Azure Functions to keep our platform as scalable as possible. We adopt a microservice architecture where services communicate with each other mainly via the Azure Service Bus. Data storage is done in a variety of ways, but Cosmos and Azure SQL databases are used most. Monitoring and logging is done with Application Insights, Grafana, and Power BI dashboards. The portal that interacts with the backend is written in Angular, while our mobile applications are developed in React Native. In general, we use Azure’s PaaS components wherever possible to stay up to date and ready for scale.

About The Job

As Backend Developer at Deftpower you co‑develop the SaaS platform that powers the future of smart charging. You join the Smart Charging team, where you solve puzzles that have never been solved before and bring your own ideas to the product. What makes this role different is our way of working: with Shape Up cycles of six weeks you get focus, ownership and the chance to deliver something concrete every time! Thanks to great collaboration, the team is very close‑knit and strong. Joining one of the regular team activities will be highly appreciated.

• Design and build backend services in C#/.NET using Azure Functions and microservice architecture.
• Integrate external systems and create secure, scalable solutions with Cosmos DB, Azure SQL, and Service Bus.
• Monitor and improve performance with Application Insights, Grafana, and Power BI.
• Brainstorm and experiment with your squad to deliver innovative features.
• Collaborate with Developers, Wierd as Team Lead, and Sander as Product Owner.

For you

At Deftpower you’ll find more than cutting‑edge tech, you’ll find a team that actually enjoys the ride! Colleagues say we are ambitious, friendly and flexible, with just the right amount of chaos to keep things interesting. Working at Deftpower is both rewarding and challenging. There are many moving parts, partners, suppliers, clients and we are a fast growing company that is still learning. You get support from talented colleagues and a management team that’s close, approachable and ready to roll up their sleeves. You get the space to shape your role, to take initiative, to make real decisions, test ideas, and yes, sometimes break things. We call it ‘learning fast’.

• Salary range: Between €4500,- and €6800,- a month.
• €2,000 training budget per year to keep learning and growing.
• Choose your own laptop to work with, up to €1,750.
• A flexible setup with hybrid working, short decision lines and a high level of trust.
• All conditions such as holiday allowance, 25 vacation days, pension, etc.

About You

You thrive in a fast‑growing, tech‑driven environment and enjoy working with a team that values innovation, transparency and impact. At Deftpower you succeed when you combine technical expertise with curiosity and collaboration.

• 3+ years of professional experience as a Backend Developer.
• Strong knowledge of C#/.NET, microservices architecture and CI/CD practices.
• Experience with Azure PaaS components such as Service Bus, Function Apps, Container Services, Azure SQL or CosmosDB.
• You must have a valid work visa for working in NL and you are willing to come to the office in Arnhem a few times a week.
• You are a match with our values.