Senior C++ Software Engineer - Global Voice at five9

This role is ideal for an experienced C++ developer with a background in VoIP and real-time communications. You should have at least 5 years of professional experience, specifically working with low-level networking protocols like SIP and RTP. This is a senior-level position designed for someone who enjoys the intersection of high-performance backend engineering and cloud-native infrastructure. As part of the Global Voice team, you’ll work in a hybrid environment out of the Porto office. While the base salary isn't listed, the package is robust, including company shares, a performance bonus, and a 10% "Flexi Benefit." The role offers significant technical variety, moving between modern C++17, AI API integrations (ASR/TTS), and public cloud deployments (AWS/Azure/GCP). **You might be a good fit if you...** * Have deep expertise in C++17+ and real-time media protocols like RTP/SIP. * Are comfortable troubleshooting complex, mission-critical systems in a DevOps environment. * Want to work on AI-driven voice technology and cloud contact center innovation. * Live within commuting distance of Porto and value a balance of remote and office work.