SIP Server Engineer

Luxoft; Schweiz; Remote; CHF 90’000 - 120’000; Vollzeit

Zusammenfassung

A leading technology firm in Switzerland is seeking an experienced SIP Server Engineer. You will be responsible for installing and configuring SIP servers, developing SIP routing logic, and ensuring high availability for server infrastructures. Ideal candidates should possess strong knowledge of VoIP standards and Linux system administration. Excellent problem-solving skills are essential for this role.

Qualifikationen

• Strong hands-on experience with SIP server installation and configuration.
• Deep understanding of SIP, SDP, RTP, RTCP, and related VoIP standards.
• Proven experience in high-load SIP server infrastructures.

Aufgaben

• Install, configure, and maintain SIP servers and supporting RTP proxies.
• Develop and optimize SIP routing logic between vehicle softphones and backend.
• Design high-availability mechanisms for the SIP server.

Kenntnisse

SIP server installation

SIP troubleshooting

Understanding of SIP/VoIP standards

Linux system administration

Scripting

Jobbeschreibung

Overview

In the rapidly evolving landscape of modern mobility and transport services, a significant challenge lies in seamlessly integrating the elements of automotive OEM infrastructure with diverse services of external partners. Luxoft will develop a Cloud platform to exchange, integrate and process data from and to the vehicle, the Mobileye SDS backend, and the MaaS System. The AWS-based solution will be designed by reviewing and improving the current concept in close cooperation with the client and further stakeholders to identify, manage and document the requirements. Our approach will be iterative, adaptive, and executed with a proactive Agile methodology. Luxoft will provide a development team with great experience in modern development practices, which are self-organized, cross-functional, and experienced to deliver in quality, time, and budget.

Responsibilities

• Install, configure, and maintain SIP servers (e.g., Kamailio, Asterisk, FreeSWITCH) and supporting RTP proxies.
• Develop and optimize SIP routing logic between vehicle softphones and the call-center backend.
• Design and implement high-availability mechanisms for the SIP server (e.g., active-active failover, state replication, scaling for 11k endpoints).
• Monitor and troubleshoot SIP signaling and RTP media flows (TCP for signaling, UDP for media).
• Implement secure communication (TLS/SIPS for signaling, SRTP/DTLS for media) and closed user group restrictions.
• Support interoperability with the vehicle backend, call-center PBX, and external operators.
• Maintain logging, test call handling, and metadata traceability as per system requirements.
• Provide operational documentation and runbooks for SIP services.

Must have

• Strong hands-on experience with SIP server installation, configuration, and troubleshooting.
• Deep understanding of SIP, SDP, RTP, RTCP, and related VoIP standards.
• Proven experience designing, deploying, and operating SIP server infrastructures that handle high-load environments (10k+ endpoints or equivalent) with built-in high availability and clustering.
• Strong knowledge of security measures for SIP/VoIP (e.g. TLS, SRTP, SBCs).
• Proficiency with Linux system administration and scripting, including managing databases for SIP routing and authentication.
• Familiarity with SIP monitoring tools.

Nice to have

• Experience with telecom interconnects or carrier-grade SIP routing.
• Exposure to AWS-based deployments.
• Relevant VoIP/security certifications.