Senior Realtime Backend Engineer, Zoom

$124-271.2k

Zoom has a Total Direct Compensation philosophy that takes into consideration; base salary, bonus and equity value

Redis

Linux

C++

Lua

Senior and Expert level

San Francisco Bay Area

Office located in San Jose, CA

Work platform for human connection

Open for applications

Work platform for human connection

1001+ employees

B2CB2BCommunicationTelecommunicationsVideo

Open for applications

$124-271.2k

Zoom has a Total Direct Compensation philosophy that takes into consideration; base salary, bonus and equity value

Redis

Linux

C++

Lua

Senior and Expert level

San Francisco Bay Area

Office located in San Jose, CA

1001+ employees

B2CB2BCommunicationTelecommunicationsVideo

Company mission

To help people connect, collaborate, and get more work done, together.

Job

Company

Role

Who you are

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)

What the job involves

You will architect high-performance C++ backend systems powering Zoom's AI-driven Contact Center platform. Working with distributed telephony infrastructure and real-time voice services, you will optimize session management and media handling at global scale. Your work will directly impact millions of customer interactions with 99.99% reliability
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
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

Application process

Anticipated Position Close Date: March 6, 2026

Our take

Zoom reworked video conferencing when most people assumed it was a solved problem, with services from Cisco and Skype already ubiquitous in workplaces and homes. However, its videoconferencing infrastructure was simpler to use, faster and more flexible than any previous solution, and it swiftly took the world by storm.

Its success bred competition, however, and companies such as Microsoft and Google, along with numerous smaller communications firms, have begun making inroads on Zoom's formerly commanding lead. Additionally, as workplaces are mostly adopting a hybrid or flexible working strategy, some of its importance as a workplace tool is wearing off and it is recording a gradual decline in daily usage rates.

To counter these trends, Zoom is expanding its business offerings through product development and strategic acquisitions. Alongside many other large tech companies, it has battled through a difficult economic situation, but it nonetheless remains a profitable company and household name. Plus, its track record of innovation means it is still very much one to watch in the communications space.

Freddie

Company Specialist at Welcome to the Jungle

Insights

Top investors

7% employee growth in 12 months

Glassdoor (3.7)

Trustpilot (1.3)

Company

Funding (last 2 of 5 rounds)

Jan 2017

$100m

SERIES D

Feb 2015

$30m

SERIES C

Total funding: $148.5m

Company benefits

Work from home opportunities
Retirement benefits
My-Time-Off (MTO), an extended vacation policy
Employee Stock Purchase Plan (ESPP) and Restricted Stock Unit (RSU) Equity Program plus Yearly stock grant for all employees
Wellness and fitness reimbursement, wellness resources, Thrive Global wellness app, TaskHuman wellness coaching app
Employee Assistance Program (EAP) including emotional support, financial resources and legal guidance
Paid Parental Leave (both parents) 16 weeks paid leave (or statutory if more generous)
Employer Matching of Charitable contributions up to $500 USD equivalent/year
Annual Zoom Store Allowance
Business Travel Accident Insurance

Company HQ

Downtown San Jose, San Jose, CA

Leadership

Eric Yuan

(CEO & Founder)

Previously VP Engineering at Cisco and WebEx.

Salary benchmarks

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