C# Software Developer

NextEnergyUtrechtHybridFull-time17 Sept 2026

NextEnergy is seeking a C# Software Developer to join its Smart Home DevOps team in Utrecht. The role focuses on building integrations with home batteries and smart devices, improving control algorithms, and enhancing customer-facing applications. Requires at least 5 years of backend C# experience and a passion for sustainable energy solutions.

What you'll do

Develop and manage integrations with various home batteries and smart devices within household energy systems
Improve the algorithms that control customer home batteries and other smart devices
Build internal systems that help streamline and optimize our processes
Enhance our customer app that shows users their energy savings and battery performance
Collaborate closely with experienced developers, with plenty of freedom to take initiative and shape the products you work on
Be part of a mature, fast-growing startup focused on innovations that accelerate the energy transition
Work on smart home solutions: dive into the integration and control of home batteries and smart devices, an essential and rapidly growing field
Contribute to a product that helps thousands of end users save energy through intelligent control of home batteries and other major household devices
Develop applications that process large volumes of data quickly and efficiently

What you need

Must-have

C#HTMLCSSJavaScriptCloud web applicationsMobile applicationsLow-code developmentTechnical design

Nice-to-have

OutSystems

Soft skills

Problem-solvingAnalyticalMotivatedResponsibilityIndependenceTeamwork

C#Software DeveloperSmart HomeEnergyUtilitiesHybridUtrechtFull-timeBackendStartup

/What you'll do

/What you need

Must-have

Nice-to-have

Soft skills

What you'll do

What you need