VoIP / SIP Engineer | VoIP / SIP Engineer (m/w/d)

Comdesk GmbH

Kölln-Reisiek, Schleswig-Holstein, Deutschland
Published Jan 16, 2026
Full-time
Permanent

Job Summary

This role is for a skilled VoIP / SIP Engineer to join the IT and Infrastructure Team in Kölln-Reisiek near Hamburg, taking technical leadership of the backend landscape. The primary focus is ensuring the platform remains scalable, performant, and stable long-term by developing, operating, and debugging the SIP/VoIP platform. Day-to-day tasks involve analyzing and optimizing complex call flows, addressing performance and quality issues, and maintaining core telecommunications systems. The ideal candidate possesses deep knowledge of SIP, RTP, and VoIP architectures, coupled with experience in Trunking, SBCs, and TK platforms, and strong Linux administration skills in a production environment. This position offers an attractive opportunity to shape the role (Job Crafting 4.0), contribute to meaningful solutions that impact millions of people, and benefit from continuous professional development through conferences and workshops.

Required Skills

Education

Not specified

Experience

  • Deep knowledge in SIP, RTP, and VoIP architectures
  • Experience with Trunking, SBCs, and TK platforms
  • Experience in productive operation of Linux systems
  • Professional experience in developing, operating, and debugging SIP/VoIP platforms
  • Experience supporting critical incidents and escalations

Languages

Not specified

Additional

  • Must be able to work in Kölln-Reisiek near Hamburg (hybrid work possible). Must be resilient during critical incidents.