Senior Backend Developer
Checkwatt AB
Company Overview
CheckWatt AB
Danderyd, Sweden
2011
Approximately 60 employees (source: linkedin.com). Revenue of 277 million Swedish kronor in FY 2024 (source: checkwatt.se).
What They Do
CheckWatt operates as an energy service company specializing in the measurement, monitoring, and control of energy storage, renewable electricity production, and flexible electricity consumption (source: checkwatt.se). The company has developed a unique "virtual power plant" technology that integrates various flexible energy resources, including residential and commercial batteries, electric vehicle chargers, solar installations, and wind turbines, to optimize grid stability and profitability (source: checkwatt.se). This innovative approach allows CheckWatt to aggregate numerous small and large batteries, enabling customers to participate in electricity markets and ancillary services that would otherwise be inaccessible due to scale limitations (source: checkwatt.se). Their flagship product, EnergyInBalance, provides a data visualization portal for customers to monitor their electricity consumption and production from various sources, enhancing user engagement and operational efficiency (source: checkwatt.se).
Projects & Track Record
CheckWatt has achieved several significant milestones in its operational history. In the winter of 2022/2023, the company successfully delivered local flexibility for the first time, utilizing a 300-kilowatt battery on the Stockholm Flex market (source: checkwatt.se). In November 2023, CheckWatt was awarded first prize in the E-Prize innovation competition for energy optimization, highlighting its commitment to advancing energy solutions (source: checkwatt.se). A major operational achievement occurred in summer 2024 when CheckWatt reached 100 megawatts of ancillary services delivery, fulfilling one-fifth of Sweden's total FCR-D ancillary service demand (source: checkwatt.se). The company also connected its 10,000th site to its virtual power plant, showcasing its rapid growth and integration capabilities (source: checkwatt.se).
Recent Developments
In April 2025, CheckWatt was acquired by Emaldo Power, creating the Nordic region's largest renewable energy aggregator (source: checkwatt.se). This strategic merger combines Emaldo's energy management solutions with CheckWatt's expertise in virtual power plants and grid balancing, ensuring continued investment in development and expansion into new European markets (source: checkwatt.se). Prior to this acquisition, CheckWatt reported a remarkable revenue growth of 146 percent in 2024 compared to 2023, driven by its aggregation services for approximately 15,000 customers (source: checkwatt.se). The launch of CheckWatt AI in February 2025 marked a significant technological advancement, integrating AI-driven forecasting with ancillary service delivery (source: checkwatt.se).
Working There
CheckWatt employs approximately 60 staff members, indicating a diverse organizational structure that includes technical and business functions (source: linkedin.com). The company maintains offices in both Stockholm and Gothenburg, suggesting potential hiring opportunities in these locations (source: checkwatt.se). The culture at CheckWatt is mission-driven, focusing on enabling households and businesses to contribute to a stable, renewable energy system (source: checkwatt.se). The emphasis on innovation and technical excellence is evident from their recent E-Prize award and the implementation of cutting-edge AI solutions, positioning CheckWatt as a leader in grid flexibility technology (source: checkwatt.se).
Last updated on Feb 23, 2026 | Report an issue
Job Description
CheckWatt is a rapidly growing company in the renewable energy sector. We are on an exciting growth journey and are now looking for a Senior Backend Developer to help shape the future of sustainable energy solutions.
With us, you have the chance to influence Sweden's environmental goals and, in the long term, make an international impact through efficient energy aggregation from renewable sources, connected to batteries and virtual power plants.
What we do
- ⚡Energy Revolution: We provide measurement, control, and IT systems for energy efficiency. Our collective mission is a stable, renewable energy system with unlimited access to cheap, clean electricity by expanding production and smartly controlling resources like batteries, EV charging, and heat pumps.
- 🌄 Sustainable Innovation: We stay at the forefront of renewable energy developments to serve our higher purpose and make a significant impact on sustainable energy solutions.
- 🙌 Openness and Trust: We build meaningful relationships with customers and partners through honesty and collaboration, ensuring our operations meet the highest standards by regularly measuring and refining key metrics.
Your Contribution
As a Senior Backend Developer with us, you will be part of a dedicated team of about 10 people developing software for embedded systems and databases. You will work on expanding our infrastructure and systems in preparation for our international expansion.
You are expected to both code and design solutions as well as mentor and support the team. You have the opportunity to work hybrid remote and on Wednesdays we meet at the office for fika and a chat. Our headquarter is in Stockholm but your nearest office will be at the "best coast" here in Gothenburg 😉
Qualifications
We look beyond your resume, but we think you have:
- At least 4 years of experience working with .NET and SQL Server.
- Experience working with technical debt, in Linux and cloud environments is a great benefit for the role.
- Python is highly valued
- Ability to communicate, listen, and coach the team.
We consider it a plus if you have:
If you have experience with Azure or any other cloud services that's a great plus. Also if you have experience working with Kanban that will contribute to our way of working.
Only English? That works totally fine!
About You
We are looking for you who are:
- Has strong leadership qualities
- Communicative, ambitious and patient
- Have excellent collaboration skills
- Coaching and educational
- Planning and like to drive your work forward under great personal responsibility and result-oriented
Why CheckWatt? 🔋
By smartly managing flexible energy resources like batteries and virtual power plants, you will play a key role in achieving this vision. We value diversity, collaboration, and continuous learning, offering you the chance to grow in a dynamic industry driven by innovation and customer focus.
Join us at CheckWatt, where your efforts truly make a difference. Every day, you contribute to more efficient and sustainable energy use, impacting both Sweden and the world. Welcome to a sustainable future where your contribution counts.
Welcome to CheckWatt! - become a key player in shaping a sustainable future!
Interviews are happening on a rolling basis, so don't wait - apply today! However, we will be entering holiday periods now so responses may take a little longer.
Looking forward to read your application, jump on our journey today!
Apply now
Job expired?Please let Checkwatt AB know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
Apply now
Job expired?Please let Checkwatt AB know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
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About the role
April 4, 2026
Full time
Company
- Mölndal, Sweden
At least 4 years
UTC+01:00
