Senior VoIP / SIP Developer

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. Your main focus will be developing an intelligent call-routing solution that integrates multiple telecom operators and optimizes routes based on cost, quality, and availability. The role combines backend development with hands-on SIP/VoIP infrastructure engineering in production environments. You will work across routing, failover, carrier integrations, and scalable telephony systems while contributing to solutions end to end. The position offers significant technical ownership, requiring autonomy and strong problem-solving skills across software and infrastructure. You will work with modern backend technologies, databases, containers, Linux systems, and cloud infrastructure in a fully remote environment. This is a full-time opportunity for an experienced telecommunications developer working on a technically challenging platform with international reach.