C#/.NET Developer Mobile App Team - eMobility (SaaS)
C#/.NET Developer Mobile App Team - eMobility (SaaS)
Build what more than 250,000 EV drivers use every month! Join Deftpower!
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.
About the team
You join the Mobile App Team, led by Jelte. A team that owns the full EV driver experience. From what users see in the app to the services running behind it. This is not a “just backend” team. This is where product, tech and real user impact come together. You build features that drivers actually use.
The team is a mix of mobile developers, backend developers, QA and a Product Owner. Some work closely together in the office, others are based in Ukraine. It works because everyone takes ownership and communicates directly.
You work in short cycles, ship fast and keep improving. No endless discussions. Just building, learning and improving.
“Everyone is driven to make customers happy, we don't just work for the sake of working.”
- Florian, Team Lead
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 and Grafana as well as PowerBI 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 build the services behind the Mobile App and shape how drivers experience charging across Europe. You work in a team that moves fast, takes ownership and turns ideas into working features without unnecessary delays.
Design and build backend services in C#/.NET using Azure Functions and microservice architecture
Build features like EV routing, push notifications, user preferences, ratings and communication
Work with Azure Service Bus and Azure SQL to create scalable and reliable systems
Monitor and improve performance using tools like Application Insights and Grafana
Collaborate closely with mobile developers, QA and Product to deliver features end to end
Ship fast, learn quickly and continuously improve what you build
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 €4500,- and €6000,- 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.
“I’ve never once looked at my watch hoping the day would be over. Everything I do feels meaningful.”
Michael - Business Development Manager
About you
You are a Backend Developer who likes building things that actually get used. You take ownership, think for yourself and enjoy working in a team that moves fast and gets things done.
3+ years of professional experience as a Backend Developer
Strong knowledge of C# .NET, microservices architecture and CI/CD practices
You have familiarity with Expo or CodePush (nice to have)
Youo have familiarity with developing mobile apps (nice to have)
Experience with Azure PaaS components such as Service Bus, Function Apps, Container Services, Azure SQL or CosmosDB
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.
Join Deftpower!
Here's what you can expect when you apply at Deftpower:
We do a quick introduction with a Team Lead to see if there's a match on the basics. We'll tell you more about Deftpower and we'd love to get to know you as a person. We will ask you to work on a short case. Next, you will meet Remco, our CTO. When you are both happy you will receive an offer.
We'd love to hear about you!