Junior Voice Engineer (m/f/d)

Retarus GmbH

1d • Hybrid

About The Position

Retarus is a global provider of cloud-based messaging solutions at enterprise scale, serving over 40% of the S&P Global 100 companies. As a privately owned and founder-managed company for over thirty years, Retarus is customer-oriented, stable, a fair employer, and a strategic business partner with a long-term vision. With approximately 500 employees in 19 offices across four continents, Retarus operates locally and thinks globally, with highly integrated, cross-border teams. This fosters a multicultural, multilingual, and engaging workplace committed to diversity and offering generous compensation, time off, and a global, collaborative environment.

Requirements

• Technical education in IT, Computer Science, Electrical Engineering, or a related field, combined with IT specialist training and solid knowledge of VoIP technologies and equipment
• At least 2 years of professional experience in VoIP environments, including hands-on experience with relevant PBX systems
• Strong understanding of SIP, SDP, RTP, and voice routing concepts
• Confident working with Linux command-line environments
• Experience with Python scripting and task automation
• Knowledge of fax technologies

Nice To Haves

• Ideally, experience with technologies such as Ribbon/Sonus SBC and PSX, ACME/Oracle SBC, or Patton Media Gateways
• Experience with voice carrier management and SIP trunk connectivity is a plus
• Experience with Asterisk and/or Kamailio is highly desirable

Responsibilities

• Support business objectives by ensuring the reliable and efficient operation of the global VoIP network environment
• Independently contribute to the design, architecture, and continuous improvement of the VoIP landscape
• Implement changes, enhancements, and upgrades within the VoIP infrastructure
• Ensure high availability of the data center VoIP infrastructure, including backup and disaster recovery concepts across worldwide locations
• Collaborate on the planning and execution of VoIP network expansions and infrastructure development projects
• Maintain secure, resilient, and high-performing VoIP network operations through proactive performance and security management
• Ensure highly available voice connectivity, including SIP trunk management and active coordination with voice carriers
• Monitor, troubleshoot, and optimize components within the production environment to ensure stable operations
• Manage and optimize outbound voice routing with a focus on cost efficiency and call quality

Benefits

• Mobile working and flexible working time
• Collaborative, diverse company culture and superior team spirit
• Flat hierarchies and great feedback culture
• Development opportunities & career perspective
• International business & cross-site collaboration
• Modern, dog-friendly offices with nice amenities
• Company-paid health insurance, public transportation, lunch vouchers and further benefits

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: Associate degree