About the company
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior VoIP / SIP Developer based in Mexico.
You will join an international technology project focused on building reliable and intelligent voice communication infrastructure.
Responsibilities
- 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
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
- 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
Conditions
- 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