C#/.NET Backend Software Developer
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.
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 and Grafana as well as PowerBI dashboards. The portal that interacts with the backend is written in Angular. In general; we use Azure's PaaS components wherever possible to stay up to date and ready for scale.
“Everyone is driven to make customers happy, we don't just work for the sake of working.”
- Florian, Team Lead
About the job
Your work consists of co-developing a SaaS solution for the EV market. You get the chance to add your own input to the product and you will work with the latest (cloud-based) techniques. You are part of a Scrum-team during the development of the product. You are actively involved in the daily stand-up where you ask for and offer help. After the standup you determine how you will technically solve your task. Using the Azure standard solutions wherever possible is your preference, but if needed, you see customization as a challenge.
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
What your new colleagues say

Anja, Office Manager
''Everyone is incredibly committed and motivated to make something of Deftpower.''

Wierd, Teamlead Smart Charging
“No politics, no unnecessary hierarchy. People say what they think and are honest.”

Tim, Operations
''The connection between the charging pole, the car, and our app makes us unique. It’s tangible technology anyone can understand.”

Timo, Team Lead
“On day 1, after onboarding, you can already deliver something for a customer. You make impact very quickly.”
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 €5500,- 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.
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 are willing to come to the office in Arnhem a few times a week
You are a match with our values!
Our values

Drive
You love turning ideas into action. You take ownership, push projects forward and get energy from creating solutions that actually work in the real world.

Earnest
You do the right thing, especially when no one’s watching. You’re respectful, honest and reliable, colleagues know they can count on you.

Forward thinking
You’re curious and not afraid to try new things. You experiment, learn fast and spot opportunities before others see them coming. Calculated risks? You’re in.

Transparency
You believe sharing is power. You communicate openly, give constructive feedback and make your work visible so the whole team can grow together.
Apply for the job
Do you want to join our team as our new C#/.NET Backend Software Developer? Then we'd love to hear about you!




