Zoom · 1 day ago
Senior Realtime Backend Engineer
San Jose (CA)
Full-time
Hybrid
Mid, Senior Level
$124K/yr - $271K/yr
5+ years expZoom Communications is a leading collaboration platform provider, and they are seeking a Senior Realtime Backend Engineer to architect high-performance backend systems for their AI-driven Contact Center platform. The role involves optimizing session management and media handling for real-time voice services, impacting millions of customer interactions with high reliability.
CollaborationInformation TechnologyMessagingSaaSVideo Conferencing
Responsibilities
Designing and optimizing distributed C++ backend modules that ensure 99.99% reliability and massive scalability for real-time voice traffic
Developing and tuning open-source telephony engines (FreeSWITCH) for session management, media handling, and protocol compliance across global clusters
Building low-latency synchronization mechanisms using Redis and distributed technologies to manage real-time call states with cross-functional engineering teams
Troubleshooting complex system bottlenecks including memory leaks, thread contention, and network latency to maintain high-concurrency performance
Collaborating with logic and product teams to optimize the C++/Lua bridge and deliver business features with minimal overhead
Qualification
Required
Communicate fluently in Mandarin to collaborate with distributed engineering teams across regions
Demonstrate 5+ years of professional C/C++ development experience or equivalent practical experience in systems programming
Master 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
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)
Benefits
A variety of perks, benefits, and options to help employees maintain their physical, mental, emotional, and financial health
Support work-life balance
Contribute to their community in meaningful ways
Company
Zoom
Zoom is a software company that offers a communications platform that connects people through video, voice, chat, and content sharing.
5001-10000 employees
H1B Sponsorship
Zoom has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (16)
2024 (178)
2023 (144)
2022 (259)
2021 (86)
2020 (34)
Funding
Current Stage
Public CompanyTotal Funding
$276MKey Investors
ARK Investment ManagementSequoia CapitalEmergence Capital
2021-11-04Post Ipo Equity· $130M
2019-04-19Post Ipo Equity
2019-04-18IPO
Leadership Team
Eric Yuan
Founder & CEO
Xuedong Huang
Chief Technology Officer
Recent News
2026-02-05
2026-02-05
Crunchbase News
2026-01-23
Company data provided by crunchbase