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Sipwise is hiring Perl developers (m/f) around Vienna

About Us

  • Sipwise develops and integrates highly-available and scalable telephony systems based on open-source software (and releases lots of its software as open-source).
  • Our platforms are deployed at ISPs all over the world, serving up to hundreds of thousands of customers each.
  • We are an extremely dedicated team with a strong professional start-up culture, reshaping the telecommunication market.

About the Job

  • You will extend our provisioning and monitoring systems and make the changes visible via the SOAP and XMLRPC interfaces.
  • Review and improve database access and performance metrics.
  • Work closely with Sipwise developers and people in the open-source community to enhance system maintenance work-flows.
  • Keep track of leading edge technologies and approaches to improve management of the Sipwise platforms.
  • Write maintainable configurations and code with extensive test coverage in a professional engineering environment using version control (GIT/SVN) and following staged packaging, installation and release cycles.
  • Troubleshoot and fix customer issues in various deployments.


  • A minimum of 5 years of experience developing object oriented Perl under Linux/UNIX systems.
  • Familiar with SQL databases, SOAP and XML-RPC.
  • You want to make an impact in collaborative and enthusiastic teams.
  • Strong communication skills in spoken and written form, English and a second language.

Bonus Points

  • Fluent German in speaking and writing.
  • You’ve contributed to open-source projects.
  • Experience with Debian GNU/Linux, Apache, MySQL, Catalyst, HTML, CSS, Javascript, jQuery.
  • You’ve worked with VoIP systems.
  • Formal theoretical background (BSc., MSc., …)
  • Laziness, Impatience, and Hubris.


  • Competitive salary. (Significant overpayment on the minimum salary of EUR 2,992 in the collective agreement.)
  • Flexible work-days and office hours.
  • Smartphones and Laptops.
  • Biiiiiig screens. More if you need.
  • Vienna, the world’s most livable city! (according to the Mercer Quality of Living Survey, already for three years in a row)


Send your detailed application including your CV/resume, engineering interests and experience, and why you would like to work with Sipwise to:

Please use PDF and/or Open Document Formats for your documents. Sipwise does not accept recruitment agency resumes. Please send your applications only to the contact address specified above. Sipwise is not responsible for any direct or indirect fees related to submitted applications.