Senior Ruby on Rails Developer (m/w/d) - English - Job Berlin - Jobs

Senior Ruby on Rails Developer (m/w/d) - English

Senior Ruby on Rails Developer (m/w/d) - English

mobileJob was founded by the etventure family and has developed into a promising start-up in the HR market with the help of well-known investors. Over 3500 satisfied customers and numerous start-up awards show that is the future.

As a young company, we work hard every day to achieve our goals, but also know how to properly celebrate successes. Our company location in Berlin provides the ideal setting for this. Since its founding in 2014, we have been offering our employees bright prospects in a growing market.

In order to give our growth a boost, we are looking for support as soon as possible in Berlin to take us to the next technical level. 

What you will do

  • Develop our job platform with Ruby on Rails 
  • Work in an agile environment (Scrum)
  • Review code of others and write tests (unit & acceptance)
  • Help our product team to develop new concepts and implement them in our new, unpublished system 


  • Training or technical degree
  • 10 years of programming experience (ideally multiple languages)
  • 5 years experience in web development
  • 2-3 years as RoR developer
  • Very good English, optionally German
  • Experience with agile methods
Our stack (pretty standard)
  • Backend:  Ruby, Ruby on Rails, MySQL
  • Frontend:  HAML, SASS, ES6
  • Infrastructure: GCP, Docker (development)

Backend or Frontend? Well, there is enough work for everyone. We strive to be up to date and are open to new things. So, it would be cool if you also try to stay up to date.

We are 6 developers in 2 teams, 3 Product Owners, 2 UX/UI Designers and a Testing Developer. 


  •  Salary (monthly): 5,000 € - 6,500 € 
  •  Holidays: 25 + 1 additional day per year of employment at mJ
  •  Starting Date: ASAP
  •  Arbeitszeiten: Flexibel, 40 hours/week