Senior Software Engineer

What You Can Expect You will architect high-performance C++ backend systems powering Zoom's AI-driven Contact Center. Working with distributed telephony infrastructure and real-time voice services, you will optimize session management at global scale. Your work will directly impact millions of customer interactions with 99.99% reliability. About the Team We deliver cloud telephony infrastructure for Zoom's omnichannel Contact Center platform. Our team collaborates across engineering, product, and operations to build high-concurrency voice services. We exist to power seamless, AI-enhanced customer experiences at enterprise scale. Responsibilities Designing and optimizing distributed C++ backend modules that ensure 99.99% reliability and massive scalability for real-time voice traffic across global clusters Developing and tuning open-source telephony engines (FreeSWITCH) for session management, media handling, and protocol compliance with cross-functional engineering teams Building low-latency synchronization mechanisms using Redis and distributed technologies to manage real-time call states and maintain high-concurrency performance Collaborating with logic and product teams to optimize the C++/Lua bridge, troubleshoot system bottlenecks, and deliver business features with minimal overhead What We're Looking For Demonstrate 5+ years of professional C/C++ development experience or equivalent practical experience in systems programming Demonstrate expertise in Linux systems programming including IPC, socket programming, I/O multiplexing (epoll), and asynchronous I/O Apply deep expertise in VoIP/real-time communication systems with protocols including SIP, RTP/RTCP, WebRTC, and voice codecs Use Redis for distributed locking, caching, and state management in high-concurrency production environments Communicate fluently in Mandarin to collaborate with distributed engineering teams across regions Contribute hands-on experience with FreeSWITCH, Asterisk, or similar telephony engines Apply familiarity with Lua scripting or embedded logic engines for telephony applications Demonstrate experience with audio quality control strategies or AI/ML integration for voice services (ASR/TTS/NLP) Salary Range or On Target Earnings: Minimum: $124 000,00 Maximum: $271 200,00 In addition to the base salary and/or OTE listed Zoom has a Total Direct Compensation philosophy that takes into consideration; base salary, bonus and equity value. Note: Starting pay will be based on a number of factors and commensurate with qualifications & experience. We also have a location based compensation structure;  there may be a different range for candidates in this and other locations At Zoom, we offer a window of at least 5 days for you to apply because we believe in giving you every opportunity. Below is the potential closing date, just in case you want to mark it on your calendar. We look forward to receiving your application! Anticipated Position Close Date: 04/17/26 Ways of Working Our structured hybrid approach is centered around our offices and remote work environments. The work style of each role, Hybrid, Remote, or In-Person is indicated in the job description/posting. Benefits As part of our award-winning workplace culture and commitment to delivering happiness, our benefits program offers a variety of perks, benefits, and options to help employees maintain their physical, mental, emotional, and financial health; support work-life balance; and contribute to their community in meaningful ways. Click Learn for more information. About Us Zoomies help people stay connected so they can get more done together. We set out to build the best collaboration platform for the enterprise, and today help people communicate better with products like Zoom Contact Center, Zoom Phone, Zoom Events, Zoom Apps, Zoom Rooms, and Zoom Webinars. We’re problem-solvers, working at a fast pace to design solutions with our customers and users in mind. Fin ... (truncated, view full listing at source)