Clojure Developer (m/f/d)

For the further development of our e-invoicing software JustOn, we are looking for your expertise in functional programming, especially with Clojure.


  • Develop and actively create our software based on a functional and declarative approach
  • Be person in charge, creative head and hands-on developer as part of our engineering team
  • Raise our product to a new level in our service architecture
  • Improve yourself as an expert for Clojure


  • You are a professional software developer in the e-business environment
  • You have interest in and initial experience with Clojure or another functional language (Haskell, Erlang, Elixir, Scala), as well as knowledge in SQL
  • You are passionate about new ways of modern software architecture
  • You are interested in professional development and exchange within the team


Our main product JustOn Billing & Invoice Management automates the entire invoicing process.

We are convinced that easy-to-use business software is the key to long-term customer satisfaction. With our software and expertise, we are experts in billing and e-invoicing.

Our customers are companies with digital business models that have chosen the market leader Salesforce CRM and need applications that make life easier for their business.


Set up your work & your working hours to suit your life situation – at JustOn, that’s exactly what we mean and live by. Let’s talk openly about which model suits you best and we’ll find a solution. Our absolute plus: Every second Friday is free for everyone – with full pay!

Further training and personal development are not a phrase for us: Two days of educational leave and a fixed budget of 1500€ per year are available to every employee.

You’ll also find a cheerful, motivated team, competitive compensation and a family-friendly and appreciative environment with very short decision-making paths.

Job Location

We offer you a place in our headquarters in Jena. However, you can also work in this position from France or Spain. Preferred regions are the Loire-Atlantique department and the Valencia region. Let’s talk about it and find the right model for you.

apply now

Contact person:

Dr. Sten Grimmer

+49 3641 5598580

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You can expect a motivated team, flexible work time models as well as a family-friendly and appreciative atmosphere with short decision-making processes.

Become part of our team and help shape the future of e-invoicing.

We look forward to receiving your application.

apply now