SDK Engineer

Zoom; San Jose, Northern (CA, KY); Hybrid; USD 221,000 - 229,000; Full time

Benefits offered by this job

Hybrid/Remote work options

Job summary

Zoom Communications, Inc. is seeking an SDK Engineer to drive cross-platform development for the Zoom Phone SDK, collaborating with client and server teams to deliver reliable and scalable features.

The role focuses on designing architecture for SIP-level interactions, implementing new features with unit tests, and ensuring quality through integration tests, memory analysis, and performance profiling. This position supports a structured hybrid work model with remote options and is located in the

Qualifications

• Requires a Bachelor's degree in Computer Science, Information Security, a related field, or a foreign degree equivalent.
• Requires 4 years of experience in the job offered or a related occupation.
• Requires 4 years of experience with C/C++ and object-oriented programming.
• Requires 4 years experience using Wireshark to analyze VOIP traffic.
• Requires 4 years experience using IDE tools including Microsoft Visual Studio.
• Requires 4 years experience using Valgrind for memory checks.
• Requires 4 years experience using Flame Graph for CPU profiling.
• Requires 4 years experience with TCP/UDP/TLS/RTP/SRTP/RCTP protocols for real-time traffic.
• Requires 4 years experience in VoIP technologies including RFCs 2833, 3550, 5760.

Responsibilities

• Design the overall architecture for Zoom Phone tasks and communicate interfaces with server and client teams.
• Implement new features and unit test cases; drive cross-team tasks and ensure features follow release plan.
• Conduct integration testing with server and client teams.
• Use WPA or relevant tools to prevent memory leaks in SDK code.
• Use Checkmarx to scan and fix SDK issues.
• Use UMDH to analyze heap memory allocations.
• Perform sanity testing to prevent crashes and regressions.
• Maintain auto testing tools and enhance testing scenarios.
• Review customer tickets and work with support to analyze call details.
• Examine client problem reports, perform root cause analysis, and reproduce bugs.
• Perform integration testing on development and release branches to ensure fixes do not break other areas.
• Collaborate with product management to define requirements and collect use cases for new features.
• Coordinate with other engineering teams and support fire drills before releases.

Skills

C/C++

Wireshark

Visual Studio

Valgrind

Flame Graph

Network protocols

VoIP protocols

SIP stacks

IDEs

Education

Bachelor's degree in Computer Science or related field

Tools

PJSIP

reSIProcate

FreeSWITCH

Job description

Immigration sponsorship is not available for this position

What you can expect

SDK Engineer will be responsible for cross-platform development, designing new features & and supporting the client & server teams to ensure Zoom Phone SDK is reliable and stable. They will provide continuous enhancements, and work with both internal & external customers on any issues they may have.

Responsibilities

• Design the overall architecture for Zoom Phone tasks and communicate interfaces with server and client teams. This includes detailed control flow at SIP level, specific command requests and responses between client, server, and UI layers.
• Implement new features and unit test cases according to new feature implementation. Drive tasks across teams and make sure roll out features follow the release plan.
• Conduct integration testing with server and client teams.
• Use Windows Performance Analyzer (WPA) or relevant tool, to prevent memory leaks in SDK code.
• Use Checkmarx to scan and fix SDK code issues.
• Use User-Mode Dump Heap (UMDH) to capture and analyze heap memory allocations for a process.
• Perform sanity testing to prevent crash and regression issues. Perform SDK API auto testing based on an internal tool.
• Maintain auto testing tools and improve those tools to support more automatic testing scenarios.
• Review customer tickets and work with support team, analyze control flow, SIP flow and determine root cause.
• Examine client problem report on demand, analyze call details, and perform root cause analysis.
• Review bugs with the reporter to understand bugs and reproduced steps, then perform root; cause analysis and determine a solution.
• Perform integration testing at the development branch and release branch to ensure the fix has no negative impact.
• Work closely with the product management team to define requirements, create user stories and collect use cases on new features.
• Collaborate with other engineering teams to confirm final design scope and assign task owners. Support client team with fire drill testing before rolling out new releases and check the production crash reports after new release roll-out.
• Work on enhancements for our automatic client report analysis tool.
• Track critical and important issues found in client problem reports.

What we’re looking for

Requires a Bachelor's degree in Computer Science, Information Security, a related field, or a foreign degree equivalent. Requires 4 years of experience in the job offered or a related occupation. Requires 4 years of experience with the following skillsets:

• Requires 4 years experience in utilizing C/C++ and object-oriented programming in task design, fixing bugs, and implementing development work;
• Requires 4 years experience in utilizing Wireshark to analyze VOIP traffic calls in network programming;
• Requires 4 years experience in utilizing IDE tools including Microsoft Studio for debugging code;
• Requires 4 years experience in utilizing Valgrind to perform memory checks;
• Requires 4 years experience in utilizing Flame Graph to check CPU cost information and code enhancements;
• Requires 4 years experience in utilizing network protocols including TCP, UDP, TLS, RTP, SRTP, and RCTP in real-time traffic transmission and audio quality enhancements;
• Requires 4 years experience in utilizing VoIP technologies including RFC2833, RFC3550 and RFC 5760 in real time communication to control system traffic, control audio quality, and develop solutions to ensure quality user experience;
• Requires 4 years experience in utilizing open-source projects including SIP stacks (PJSIP, reSIProcate, FreeSWITCH) to support fundamental layer covering low-level SIP protocol parsing;
• Requires 4 years experience in utilizing integrated development environments (IDEs) including Visual Studio in software development.
• Telecommuting work arrangement permitted. Position may work in various unanticipated locations throughout the U.S. Position does not require U.S. or domestic travel.

Zoom Communications, Inc.

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Salary Range or On Target Earnings

Minimum:

$221,374.00

Maximum:

$228,700.00

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.

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. Find room to grow with opportunities to stretch your skills and advance your career in a collaborative, growth-focused environment.

Our Commitment

At Zoom, we believe great work happens when people feel supported and empowered. We're committed to fair hiring practices that ensure every candidate is evaluated based on skills, experience, and potential. If you require an accommodation during the hiring process, let us know—we’re here to support you at every step.

We welcome people of different backgrounds, experiences, abilities and perspectives including qualified applicants with arrest and conviction records and any qualified applicants requiring reasonable accommodations in accordance with the law.

If you need assistance navigating the interview process due to a medical disability, please submit an Accommodations Request Form and someone from our team will reach out soon. This form is solely for applicants who require an accommodation due to a qualifying medical disability. Non-accommodation-related requests, such as application follow-ups or technical issues, will not be addressed.

Think of this opportunity as a marathon, not a sprint! We're building a strong team at Zoom, and we're looking for talented individuals to join us for the long haul. No need to rush your application – take your time to ensure it's a good fit for your career goals. We continuously review applications, so submit yours whenever you're ready to take the next step.

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