Senior Fullstack Developer (all genders)

We at HalloSonne are protecting our planet by making every house a Solar Home. This is how we accelerate the transition of our energy system to 100% renewable energy.

HalloSonne offers a total photovoltaic solution - from planning to installation and maintenance. Because we make photovoltaics simple - and affordable for many people. Make every home a solar home!

Our mission is shaped by a strong understanding of values: home, simplicity, cooperation, and sustainability define our brand. Whether you live in vibrant Vienna, between mountain peaks in the Alps, or along our many rivers - with your work at HalloSonne you become a part of our solar system and can actively shape the energy transition as a

Senior Fullstack Developer (all genders)

You like to use your energy for this

  • You develop the frontend for the HalloSonne web platform in close coordination with the UI designers.
  • You will work closely with the backend developers to properly utilize the system APIs for the frontend.
  • With your expertise in technical solutions, you advise the team on the optimal implementability
  • Using test-driven development methods, you write high-quality, self-documenting code
  • You are familiar with testing and debugging processes (including unit and UI tests)
  • You bring a strong affinity for Linux and other open-source platforms to the table

These are highlights from your orbit

  • You have experience with developing modern JavaScript-based applications in ReactJS and NextJS.
  • You have experience with HTML / CSS and Responsive Design
  • You know CSS processors (TailwindCSS), testing tools (, Jest)
  • You are familiar with consuming REST and GraphQL APIs
  • You are able to write effective unit, integration, and end-user automation tests
  • You are a team player with strong communication skills and enjoy contributing with your own ideas

Become part of our solar system

  • Work in a goal and results-driven company where indeed every member of the team can impact the outcome of our careers.
  • Benefit from our flat hierarchies and agile way of working to contribute with your ideas, experience, and mindset.
  • Meet enthusiastic people who share their experience and expertise with you and the whole team, always open to learning new things themselves.
  • Make new friends in our team, for example at our regular after-work events.
  • Enjoy flexible working hours and decide how and where you can work best.
  • Use your sponsored "KlimaTicket" to get to work or explore all of Austria.
  • Keep your body moving - with a free membership to myClubs | sports provider.
  • Receive a fair payment according to your qualifications and previous experience with a gross monthly salary starting at € X.X00,- (at least above the KV level).

Do you want a job in our solar system? Do you want to actively participate in the energy transition? Do you want to have a job that moves you and society forward? Then we want to get to know you as soon as possible!

If you want to clarify anything before you apply, feel free to send us an email at

Hallo Sonne Logo

Unsere Vision: Menschen ermöglichen, ihr Zuhause selbst mit Sonnenenergie zu versorgen. Unsere Idee: Photovoltaik so einfach und günstig zu machen, dass sich das möglichst viele Menschen leisten können. So schaffen wir gemeinsam die Energiewende!

HalloSonne GmbH © 2022 · Datenschutz · Impressum · Cookie Einstellungen

( * ) Miet-Modell: pro Monat über 20 Jahre, min. 2,8 kWp, 7 Paneele + Technik inkl. Installation, danach optional Kauf für 1 Euro. Sofort-Kauf-Modell: min. 2,8 kWp, 7 Paneele + Technik inkl. Installation.