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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.

Bremen | rdmo-12-rpl

Senior IOS Developer (f/m/d)

Don’t just go to work. Thrive.
We look for people who are committed to openness and have the will to revolutionize the market. You will join OX as part of a special team. As a talented individual, you can advance within your department as well as getting the opportunity to work 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 /, Rackspace, Softbank, and GoDaddy use our "white label" products for eMail and collaboration.

Open Source is our foundation  
The mix of divergent perspectives, corporate objectives, and personal goals is our foundation and speeds up innovation.


As iOS developer at OX, you make the difference

As iOS Developer at OX, you will develop state of the art apps for productivity and communication. We have a divers team of coders, designers, quality and release engineers. You will work in heart of Bremen with a beautiful look of the Weser river.


Your passion / Your job

  • Design and build advanced applications for the iOS platform
  • You know how a native iOS app "feels"
  • Collaborate with cross-functional teams to define, design, and ship new features 
  • Work with HTTP and REST APIs
  • Unit-test code for robustness, including edge cases, usability, and general reliability
  • You spend a lot of time with Instruments in order to analyze and further optimize code
  • You are not afraid of debugging other's code
  • Work on bug fixing and improving application performance
  • Continuously discover, evaluate, and implement new technologies to maximize development efficiency


What do you bring to the table

  • BS/MS degree in Computer Science, Engineering or a related subject
  • Analytical thinking
  • Proven software development experience for iOS with Swift, Objective-C and Cocoa Touch
  • Used to daily usage of Scrum and Git
  • We do expect the capacity for teamwork and social competence as well as fluent knowledge of German and English in spoken and written


What do we offer

  • Work in a nice and diverse team in the heart of Bremen with a view of the river Weser
  • Good accessibility to public transportation
  • Flexible working hours with the option to do home office
  • As a fellow Open Xchange employee, work from any other office in Germany or abroad is possible
  • Company pension scheme
  • Gym membership
  • Free beverages and snacks like fresh fruit, vegetables and nuts
  • Team and company events like hackathons and Christmas parties
  • Internal and external training, attending conferences

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