SIP/VoIP Engineer

About the Role

Sarj is seeking a SIP/VoIP Engineer to join its team in Riyadh, Saudi Arabia. This full-time role involves developing the company's telephony capabilities and managing custom integrations that connect Voice AI agents to client infrastructure. The engineer will collaborate with Operations and Engineering teams, as well as B2B and B2G clients, to deliver reliable voice solutions.

Key Responsibilities

• Build and maintain telephony capabilities within Sarj’s platform in collaboration with the engineering team.
• Integrate Voice AI agents with client PBXs, SBCs, SIP trunks, and contact-centre platforms.
• Develop custom call flows, SIP routing, and WebRTC-based human handoffs.
• Lead technical client discussions, gather requirements, and drive integrations to production.
• Troubleshoot call quality, signalling, connectivity, and interoperability issues.

Qualifications and Experience

• Bachelor’s degree in Software Engineering, Computer Science, or a related field.
• 4+ years of experience in SIP/VoIP engineering or telephony integrations.
• Professional proficiency in both Arabic and English.
• Strong communication and client-facing skills.

Required Technical Skills

• Strong knowledge of SIP, RTP, SDP, call routing, and VoIP networking.
• Software development experience, including the ability to build integrations and work with APIs beyond configuring existing telephony platforms.
• Hands-on experience with Asterisk, FreeSWITCH, Kamailio, or commercial SBCs.
• Experience working with Saudi telecom carriers, WebRTC, and enterprise telephony platforms such as Genesys, Avaya, or Cisco.

Work Environment and Culture

This role offers the opportunity to contribute to a high-growth, innovative tech start-up. Sarj fosters a collaborative, mission-driven culture where employees gain hands-on experience working on impactful AI products.

Candidate Profile

The ideal candidate will demonstrate a proactive, hands-on approach to problem-solving and ownership in their work.