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Jobs at Open-Xchange

Interested in becoming part of something big?
You have landed in the right place. We are always looking for great talent to join our variety of departments. Check out our current job vacancies below or send us your speculative application. Become part of an exciting team at OX.

Dortmund | Olpe | rdfe01

JavaScript Frontend-Developer (f/m/d)

Don’t just go to work. Thrive. 
We need people who are committed to openness, have a rebellious business spirit and the will to revolutionize the market.

Open people for open source! 
By joining OX as part of a special team, this position is a launch pad for highly talented individuals to build their experience and access many opportunities working for OX globally. 

Our Vision
A borderless internet that is open, safe and free

We are eMail 
Worldwide companies like: Comcast, Cox, 1&1, STRATO, Deutsche Telekom, Vodafone, Orange, Unitymedia, ItaliaOnline, Host Europe, NetCologne, network solutions / and Rackspace all use our "white label" products for eMail and collaboration.


We are looking for a new member for our frontend team at Open-Xchange. We develop a modern single page application based on latest web technologies for our core product, the OX App Suite. We also use JavaScript on the server, we create new micro-services with node.js and define the needed APIs ourselves. We take care of the frontend stack, from design and code to the finished build and the automated end-to-end tests. For Continuous Deployment we rely on GitLab and Docker, breaking down the borders to DevOps more and more. If you can imagine helping to work with the latest technologies on a modern cloud product, we would be happy to receive your application.


What do you have to do

  • Further Development of the OX App Suite UI, one of the market-leading web applications in the e-mail environment
  • Agile development of new features
  • Maintenance and Refactoring of existing code
  • Development of Unit- and End-to-End-Tests
  • Development of Microservices with node.js in Cloud-Environments
  • Continuous-Deployment and Delivery of the software
  • Participation in daily Standups


What do you bring to the table

  • Completed studies with a focus on computer science
  • Many years of experience in JavaScript programming
  • Good knowledge of popular frontend libraries and their concepts, e.g. React, Vue, jQuery or Bootstrap
  • Very good knowledge of German and good knowledge of English
  • Team spirit, creativity, pragmatism and curiosity
  • Fun with programming and solving problems


We would be delighted about additional knowledge like

  • Knowledge in ES6
  • Knowledge with node.js and Express
  • Knowledge with Containering, e.g. Docker
  • Safe handling of Git
  • Affinity for good UX and good interface design
  • Automated End-to-End tests in the frontend
  • Continuous-Deployment


Our offer to you

  • Independent work in a versatile team
  • Flexible working hours and home office
  • Intensive cooperation with experienced colleagues
  • Open and regular feedback culture
  • Hackathons, workshops and team events
  • Further development of own technical skills
  • Each developer is equipped with the latest hardware (e.g. 15" MacBook Pro)
  • Work on our current product that millions of users use every day.
  • Sports facilities, free drinks and fruit, free parking depending on location.
  • Company pension scheme

About Open-Xchange

Open-Xchange (OX) is a market leader in Mail / Messaging and DNS-based security services, with more than 200m seats sold through international hosting and telco providers worldwide, including partners such as 1&1, Orange, Italiaonline, Comcast, GoDaddy or Softbank.

We at OX have our roots in Open Source, and this has shaped our view of the world and culture – open, diverse, and with a bias to act, giving everyone at OX room to take responsibility within their team and grow. OX believes in an internet that is open, safe and free. We want to create competitive products that allow our providers to deliver secure internet services with a great user experience, and that respect privacy and generate value.

With some 270+ people worldwide, OX develops and operates Open Source software (aaS) for mail / messaging (OX App SuiteOX Guard) and collaboration / productivity (OX DriveOX Documents). OX’s  Dovecot is the world’s dominant open-source IMAP server software, and our PowerDNS provides secure DNS services to our telco customers and their users.

Our business is fast-paced and changing constantly. We are looking for people who share our beliefs, who are out there to make a difference, are entrepreneurial and enjoy working in a high-tech environment as part of a truly international team. OX is headquartered in Cologne, with further locations throughout Germany (Hamburg, Bremen, Dortmund, Olpe and Nuremberg), the USA (Louisville, KY), Finland, the Netherlands, Italy, France, Spain and Japan (Tokyo).

If you are interested, please contact Jochen F. Schude for further information - or send us your paperless application with a cover letter including the job ID (see at the top left corner), tabular CV, certificates, salary expectations and the earliest possible date of entry by e-mail to recruiting at