Principal SWE, Windows Device Drivers

Zscaler•San Jose, CA

About The Position

About Zscaler Zscaler accelerates digital transformation so our customers can be more agile, efficient, resilient, and secure. Our cloud native Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Here, impact in your role matters more than title and trust is built on results. We believe in transparency and value constructive, honest debate —we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession, collaboration, ownership and accountability. We value high-impact, high-accountability with a sense of urgency where you’re enabled to do your best work and embrace your potential. If you’re driven by purpose, thrive on solving complex challenges and want to make a positive difference on a global scale, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity. Our Engineering team built the world’s largest cloud security platform from the ground up, and we keep building. With more than 100 patents and big plans for enhancing services and increasing our global footprint, the team has made us and our multitenant architecture today's cloud security leader, with more than 60 million users in 185 countries. Bring your vision and passion to our team of cloud architects, software engineers, security experts, and more who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy. We're looking for an experienced Principal Software Engineer to join our Endpoint Engineering team. This high-impact role will shape the future of mobile security services, affecting millions of users globally. Reporting to the Sr. Manager, Software Development Engineering, you will be responsible for:

Requirements

10+ years of software engineering experience with expertise in lower-level languages like C and C++, alongside in-depth knowledge of Windows internals, kernel-mode programming, and network protocols
Proficient in low-level Windows driver development, particularly network drivers, with strong debugging skills for network-related problems
Comprehensive understanding of L2/L3 networking protocols and services, including DNS, DHCP, HTTP, TCP/IP, and SSL/TLS
Skilled at writing high-quality, well-documented code with low complexity and excellent programming practices
Bachelor’s degree in computer science or a related field

Nice To Haves

Additional experience in macOS, Android, iOS or Linux
Mobile device Management (MDM) and Enterprise Mobility Management (EMM)

Responsibilities

Developing Windows Device Drivers primarily Network Filter drivers and Windows Filtering Platform drivers to intercept network traffic
Improving the code quality and to build solid, testable, and well-documented features
Making significant contributions to the design and implementation of major development projects, and working closely with our product managers and other teams to implement customer-impacting features
Collaborating with internal Zscaler teams as the domain expert for Client platform and help resolve customer deployment issues