Senior Backend Developer (.NET) - BESS Cloud Platform
Join us to to build a cloud-native platform supporting the renewable energy transition.
Seeking an Experienced Backend Developer to shape the future of smart energy
The European energy system is in the midst of a green transition, where battery energy storage systems will play a central role, and we need you to make it happen!
Capture Energy, a fast-growing Swedish company founded in 2023 and with 38 employees currently, aims to become a market leader in the Nordics in providing battery energy storage systems (BESS) for energy flexibility services - a market that is expected to experience significant growth in the coming years. With innovation at our core, we're building the digital infrastructure that powers the clean energy transition - starting with our next-generation platform, Capture Cloud.
As a small company today, we are able to operate very differently compared to the larger players on the market, which gives us a great competitive position. We are committed to bringing good energy to every setting where we operate: from our customers, partners, to our employees.
About The Role
We are looking for a Senior Backend Developer to join our team in Stockholm and help build the cloud platform powering battery energy storage solutions (BESS). You will design and develop scalable backend services and APIs, work with cloud services and collaborate with the Tech Lead, Product Manager, and Product Designer to deliver secure, reliable, and high-performing solutions.
This role is ideal for a developer who enjoys solving complex problems, working with modern cloud technologies, and contributing directly to the product’s success.
Key Responsibilities
- Design, develop, and maintain backend services and RESTful APIs in C#/.NET.
- Build secure and scalable integrations with external systems and third-party services.
- Design and develop high-quality public APIs to enable others to integrate with Capture Cloud.
- Work with different types of data storage: relational (SQL), document-based (NoSQL), and time-series databases.
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Ensure high quality, performance, and business value through strong analytical problem-solving and code craftsmanship.
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Implement and maintain unit tests, integration tests, and automated test pipelines as part of development.
- Work with containerization (Docker) and support event-driven, cloud-native architecture.
- Contribute to and improve CI/CD pipelines to ensure reliable and efficient delivery.
- Collaborate with teammates through code reviews, knowledge sharing, and continuous improvement.
Skills and Qualifications
- 7+ years of backend development experience with strong expertise in C#/.NET.
- Solid understanding of modern software design principles and experience working with event-driven architecture.
- Proven experience with SQL (e.g. PostgreSQL), NoSQL, and time-series databases (e.g. ADX).
- Experience in API development and management, including API gateways (e.g., Azure APIM), RESTful principles, and scalable integration patterns.
- Hands-on experience with Azure messaging services such as Event Hub, Service Bus, and Event Grid.
- Experience with Azure cloud services such as Entra ID, Functions, Container Apps, Key Vault, Application Insights, API Management, and IoT Hub.
- Experience with CI/CD pipelines (Azure DevOps or GitHub Actions).
- Practical experience with unit and integration testing, with a mindset of embedding quality into every stage of development.
- Familiarity with containerization (Docker); Kubernetes experience is a plus.
- Familiarity with Infrastructure as Code (IaC) tools such as Terraform, with the ability to contribute to infrastructure definitions when needed.
- Good understanding of system architecture and integrations.
- Experience in IoT environments, with knowledge of protocols such as MQTT or Modbus, is a plus.
- Fluent in English.
Why Join Us?
As a part of our team, you will have the opportunity to work in an environment that encourages personal and professional growth. We are committed to supporting our employees, offering opportunities for training and progression to those who show dedication and enthusiasm in their roles. Our team is our most valuable asset, and we strive to ensure each member feels valued, supported, and inspired.
We offer
- A chance to build a cloud-native platform supporting the renewable energy transition
- An inspiring workplace where people are at the heart of everything we do, driving us toward our vision
- Hands-on work with modern technologies in a cloud-native, IoT-driven environment
- Competitive salary
- Maximized wellness contribution
- Pension and health insurance
Application Process
If you believe you have the responsibility, independence, and drive we are looking for, please submit your CV and a covering letter detailing your suitability for the role. We welcome applicants from all backgrounds and are committed to creating a diverse and inclusive workplace.
We look forward to hearing from you and possibly welcoming you to our team.
About the company
Capture Energy, established in 2023, aims to be a major player in large-scale battery energy storage systems for flexibility services. We distinguish ourselves by providing turnkey solutions with smart services.
Visit our website for more information: www.captureenergy.eu
- Department
- Product & Technology
- Role
- Developer
- Locations
- Stockholm
- Remote status
- Hybrid
Colleagues
Stockholm
Work place and culture
We bring good energy!
Capture Energy is a Nordic-based company with offices in Gothenburg, Stockholm, Fredrikstad, Luleå, and Odense. Our team consists of experienced professionals from renewable energy and flexibility services backgrounds.
Our distributed Nordic team meet in person at least once every quarter at different locations. Some of us enjoy group morning runs before the meetings. We value mutual support and seek individuals who are humble, positive, and can turn challenges into opportunities.
While we are a distributed team with a big part of our work being done through digital platforms, we value on-site collaboration and we expect you to be in our offices during the majority of your working time.
About Capture Energy
We are Capture Energy, an energy storage solutions company dedicated to bringing good energy to our customers. Our impact goes beyond megawatts; it drives progress and powers our customers’ businesses.
Specialising in delivering end-to-end energy storage solutions, we enable forward-thinking customers to seize opportunities in the flexibility market rapidly, safely, and sustainably.
We emphasise on building lasting relationships with our customers, service partners and aggregators by offering best-in-class service. Our insights into the flexibility market and the advantages of energy storage solutions are shared freely, ensuring informed decisions and successful outcomes.
Our Nordic team of tech-savvy business professionals and business-minded engineers is here to guide you seamlessly from initial planning to revenue generation – one megawatt at a time.
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