Software Engineer II – Voice Client at five9

This role is ideal for a mid-to-senior level engineer with 5+ years of experience specializing in the intersection of web technologies and telecommunications. The team is looking for a JavaScript expert who also has a solid foundation in backend or systems languages (C++ or Java) and a deep understanding of how real-time audio travels across the internet. The standout feature of this position is the flexibility of a fully remote setup (for those outside the San Ramon area) paired with a high-end salary ceiling of $168k. Five9 offers an impressive benefits package, including 100% employer-paid healthcare premiums for employees and a generous stock purchase plan, making it a strong choice for those seeking long-term financial and physical wellness. **You might be a good fit if you:** * Have mastered **WebRTC** and understand the nuances of SIP signaling and VOIP protocols. * Are highly proficient in **JavaScript** but can also navigate a **C++ or Java** codebase. * Enjoy "under the hood" troubleshooting involving network packets and audio media analysis. * Want to mentor junior devs while building global, scalable voice infrastructure.