Zoom is an award-winning workplace. We have been recognized by Comparably as #1 CEO, Company Happiness, Benefits, Compensation, Diversity, and more! Not to mention we’ve been awarded by Glassdoor as the 2nd Best US workplace & Best Large Company US CEO in 2018, Wealthfront, and Business Insider. Our culture focuses on delivering happiness, our commitment to transparency, and the tangible benefits we provide our employees and our customers.

The Sr. 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.

Zoom Phone SDK task design & development (40%)

• 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.

Zoom Phone SDK Stability & Improvements (20%)

• Use Windows Performance Analyzer (WPA) or relevant tool, to prevent memory leaks in SDK code

• Use Checkmarx (https://www.checkmarx.com) 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

SDK API auto testing and auto testing tool enhancement (10%)

• Perform SDK API auto testing based on an internal tool

• Maintain auto testing tools and improve those tools to support more automatic testing scenarios

Troubleshoot customer issues and fix SDK bugs (15%)

• Review customer tickets and work with support team, to 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 on new features requirements (10%)

• 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 release and analyze client problem reports (5%)

• 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

  
  

Requirements:

• Minimum 3 years of work experience

• BS degree in CS, EE or its related field

• Solid knowledge of C/C++ and object-oriented programing

• Good understanding of network communication & Multitask programming & Debugging skills

• Familiar with network protocols, like TCP/UDP/TLS/RTP/SRTP/RTCP, etc.

• Experience with VoIP technologies and audio quality control

• Experience with SIP stacks is preferred (PJSIP , reSIProcate, FreeSWITCH, etc.)

• Familiar with at least one IDE tool (e.g. Visual Studio) within one or more platforms(WIN/MAC/IOS/ANDROID)

• Support other teams, follow up, and quickly resolve issues

• Good teamwork and willingness to help others

• Excellent communication skills

• Flexibility and ability to work after hours

Preferred Qualifications

• Preferences MS degree in a related field

• Degree in MIS

#LI-REMOT

Ensuring a diverse and inclusive workplace where we learn from each other is core to Zoom’s values. We welcome people of different backgrounds, experiences, abilities and perspectives including qualified applicants with arrest and conviction records as well as any qualified applicants requiring reasonable accommodations in accordance with the law.

We believe that the unique contributions of all Zoomies is the driver of our success. To make sure that our products and culture continue to incorporate everyone's perspectives and experience we never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status.

All your information will be kept confidential according to EEO guidelines.

Given Zoom’s status as a federal contractor, we are subject to President Biden’s Executive Order requiring COVID-19 vaccinations for all US employees. As such, Zoom requires all US employees, including remote employees, to be fully vaccinated. Zoom will consider requests for reasonable accommodations for religious or medical reasons as required under applicable law.

Explore Zoom:

• Hear from our leadership team

• Browse Awards and Employee Reviews on Comparably

• Visit our Blog

• Zoom with us!

• Find us on social at the links below and on Instagram