RubyOnRails /Backend Software Developer / Mobisol

RubyOnRails /Backend Software Developer / Mobisol
Berlin, Friedrichshain


Mobisol is a leading German company for prepaid Solar Home Systems (SHS) dedicated to delivering a clean, affordable alternative to fossil fuels for low-income households living without access to reliable energy. Mobisol products combine solar energy with innovative mobile technology and microfinance. Mobisol is currently serving over 10.000 system installations in Tanzania and Rwanda. In the future, Mobisol aspires to scale rapidly in order to reach hundreds of thousands of households – thereby stimulating economic and social development in project countries while simultaneously contributing to global environmental protection.

Working environment

Young, innovative and highly motivated team in the heart of Berlin´s start up scene and in the subsidiary companies in Tanzania and Rwanda.


  • Building scalable and state of the art backend applications preferably with RubyOnRails
  • Developing powerful database algorithms
  • Designing and implementing APIs for mobile clients

    Our offer

  • No ever repeating and boring daily business but plenty of interesting and challenging tasks
  • Hands on implementations in Germany as well as abroad in Africa
  • Creative environment with fast evolving operations
  • Delivering real value to customers excluded from reliable power supply in developing countries
  • Young, fast, innovative, adaptive and highly dedicated teams both in the heart of Berlin´s start up scene in Friedrichshain and in East Africa
  • Direct participation in the success of the venture (shares) negotiable
  • Flexible working hours
  • Homeoffice optional


  • In-depth understanding of high level software mechanisms and best practices
  • Profound understanding of software architecture and design
  • Strong problem solving, trouble-shooting skills
  • Good team worker with intercultural skills who shares our motivation to drive a solar revolution
  • Affinity to the *nix based software development methodologies is highly desired
  • Experience in developing on RubyOnRails platform a plus
  • Understanding of current database engines and their underlying philosophies a plus
  • Working language is English, German will be considered as an asset
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