Senior VoIP / SIP Developer

Accountabilities • Design, develop, and maintain intelligent call-routing solutions for production SIP/VoIP environments.

• Integrate multiple telecom operators and optimize call routes according to cost, quality, availability, and reliability.

• Implement and maintain SIP routing, prefix-based routing, failover mechanisms, and related telephony logic.

• Develop backend services and integrations using Python and/or Node.js/TypeScript.

• Work with Kamailio or OpenSIPS to build and maintain robust SIP infrastructure.

• Manage and optimize PostgreSQL databases supporting routing and telephony workflows.

• Deploy and operate services using Linux, Docker, and cloud infrastructure.

• Troubleshoot production issues across SIP signaling, routing, backend services, and infrastructure.

• Take ownership of technical solutions from design and implementation through deployment and ongoing optimization.

• Collaborate effectively in a fully remote, international environment while working independently on complex technical challenges.

Requirements:

• Proven professional experience working with SIP/VoIP in production environments.

• Strong hands-on experience with Kamailio or OpenSIPS .

• Solid understanding of SIP, VoIP, call routing, prefix-based routing, and failover mechanisms.

• Professional backend development experience with Python and/or Node.js/TypeScript .

• Strong working knowledge of PostgreSQL .

• Experience with Linux, Docker, and cloud infrastructure .

• Ability to independently take ownership of technical solutions from conception through production.

• Strong troubleshooting, analytical, and problem-solving skills.

• Excellent autonomy and ability to work effectively in a fully remote environment.

• English proficiency suitable for collaboration within an international technical team.

• Experience with FreeSWITCH, Asterisk, LiveKit, rtpengine, Telnyx, Twilio, Plivo, or Bandwidth is highly valued.

• Previous experience working with telecom carriers, CPaaS platforms, or telephony infrastructure is a strong advantage.

Benefits:

• 100% remote work arrangement.

• Full-time employment.

• Opportunity to work on an international technology project with real-world production telephony infrastructure.

• High level of technical ownership and autonomy.

• Exposure to advanced SIP/VoIP routing, carrier integrations, failover, and intelligent call-routing systems.

• Opportunity to work across backend development, cloud infrastructure, Linux, Docker, and telecommunications technologies.

• Challenging technical environment focused on building scalable and reliable communication solutions.

• Opportunity to contribute to a project with international reach and significant technical scope.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best! Why Apply Through Jobgether?

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.

#LI-CL1