ATL Windows Client Engineer (Win32 / MFC / DirectUI)

What you can expect
As a Software Engineer on the Zoom Client Application team, you’ll help shape the future of Zoom Phone on Windows. You’ll design and scale high-performance, feature-rich client applications using your expertise in C++, GUI development, multi-threading, and ATL. This is an exciting opportunity to contribute to a leading communication platform and collaborate with cross-functional teams to deliver seamless user experiences.

About the Team

Our Zoom Client Application is at the forefront of Zoom's communication platform, focusing on delivering high-performance, feature-rich soft-phone applications for the Windows operating system. We collaborate cross-functionally with Engineering, Product Management, Design, DevOps, and Customer Support to deliver seamless user experiences. The team is committed to innovation, performance, and quality, constantly iterating and enhancing our product offerings. We value expertise in Windows development, problem-solving, and delivering reliable, scalable solutions for our users.

Responsibilities

• Designing and implementing scalable, efficient, and elegant software components and features for Zoom's Windows soft-phone applications, including both UI and common modules.

• Writing and maintaining high-quality Windows client code, ensuring stability, performance, and alignment with security and scalability standards.

• Prototyping and iterating quickly on new product features, contributing to architecture planning, module integration, and system-level design discussions.

• Collaborating cross-functionally with Engineering, Product Management, Design, DevOps, Technical Support, and Customer Success to drive end-to-end development and successful releases.

• Integrating client applications with backend services, APIs, cloud infrastructure, push notifications, and Zoom's phone server and SDK.

• Participating in the full software development lifecycle, from initial requirements gathering through design, development, testing, deployment, and maintenance.

• Analyzing and leveraging data from internal systems and service providers to identify performance gaps, ensure real-time accuracy, and improve service quality.

• Documenting and upholding development standards and technical content, including performance evaluation formats and system testing strategies.

What we're looking for
 

Minimum qualifications:

• Possess a Bachelor's in Computer Science or a related field.

• Possess 5+ years of professional C++ development and 3+ years of GUI development experience on Windows.

• Demonstrate solid understanding of ATL (Active Template Library) and multi-threading principles.

Preferred qualifications:

• Program and optimize Windows UI/UX with multithreading for high-performance applications.

• Debug and optimize performance on Windows platforms, ensuring stability and efficiency.

• Gain experience in real-time collaboration, multimedia communication, instant messaging, and SIP application development, including third-party C/C++ libraries.

• Display excellent debugging skills, analyzing stack traces to identify root causes or problem locations.

• Have expertise in data structures, algorithms, and software design optimized for performance at scale, along with excellent communication skills for collaboration.

Salary Range or On Target Earnings:

Minimum:

$98,900.00

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

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:

11/12/25

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, be