Über uns

Als eines der am schnellsten wachsenden Start-ups in Europa revolutioniert klarx die Baubranche! Durch unsere führende Online-Plattform disruptieren wir die Vermietung von Baumaschinen. Dadurch wird der Mietvorgang einfacher, schneller und kosteneffizienter. Das Resultat: tausende von Kunden vertrauen tagtäglich auf unsere digitale Lösung, um auch in Zukunft komplexe Bauvorhaben erfolgreich zu meistern. Bewirb dich jetzt bei uns, wenn du eine zukunftsträchtige Branche in ein neues, digitales Zeitalter führen willst. Deine Arbeit hat direkten Einfluss auf eine Multi-Milliarden Industrie, deren Digitalisierung unser oberstes Ziel ist!


You are part of something BIG: We build a platform that makes renting construction equipment easy, enabling our customers to focus on their core  business, e.g. by providing them with a visual dashboard and map of their supply chain for actionable insights at any time.

  • Being a Backend Software Developer (m/f/d) at klarx means having a variety of responsibilities:   with your understanding of programming languages and tools your are able to analyse current code, develop new features for our website and products, formulate more efficient processes and to create a more seamless experience for our users. 

  • Delivering quality is our primary goal: you are our quality champion who improves our processes and development every day by using modular, scalable and testable Ruby and Elixir code. We live by the motto: if it’s not efficient, improve it!

  • You are passionate-driven and you like to push your limits every day. 

  • With your know-how you mentor junior developers and share knowledge with the team and across   functions in the company.


  • You are a geek at heart and show that you can master the latest technologies and that you are       versatile with modern languages, tools and workflows. We are preferably looking for little genius in Ruby or Python. 

  • You know how to take responsibility and get shit done. Being part of an agile environment [Scrum/Kanban] sounds familiar to you. 

  • Your are passionate about learning new tools and keeping yourself up-to-date

  • You enjoy the daily sharing of ideas and sparring in an active, outgoing development team, as well as sharing your knowledge and special experience with other team members.

  • We are multicultural and welcome any nationality. Therefore, please be fluent in English. German is a plus.


  • Our corporate culture speaks for itself: we stand for a dynamic and innovative environment with flat hierarchies. In addition to numerous team events, we celebrate our team lunch every Wednesday.

  • We live our values - in addition to vigor and responsibility each employee stands for mutual respect, efficient action and continuous learning!

  • We are backed up by top notch investors and entrepreneurs in the mobility sector, such as Target Global, the founders of Flixbus and Delivery Hero.

  • With well over 200,000 available machines and a nationwide network of rental partners, klarx is the leading online platform for renting construction equipment and construction equipment.