Zscaler · 2 weeks ago
Windows Network Filter Driver Engineer
San Jose, CA
Full-time
Hybrid
Lead/Staff
$182K/yr - $260K/yr
10+ years expZscaler is a leading cloud security company that accelerates digital transformation for its customers. They are seeking a Principal Software Engineer to join their Endpoint Engineering team, responsible for developing Windows Device Drivers and improving code quality while collaborating with internal teams to enhance mobile security services.
Cloud SecurityCyber SecurityEnterprise SoftwareSecurity
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
Qualification
Required
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
Preferred
Additional experience in macOS, Android, iOS or Linux
Mobile device Management (MDM) and Enterprise Mobility Management (EMM)
Benefits
Various health plans
Time off plans for vacation and sick time
Parental leave options
Retirement options
Education reimbursement
In-office perks, and more!
Company
Zscaler
Zscaler is a global cloud-based information security company that enables secure digital transformation for mobile and cloud.
5001-10000 employees
H1B Sponsorship
Zscaler has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (164)
2024 (220)
2023 (108)
2022 (144)
2021 (82)
2020 (51)
Funding
Current Stage
Public CompanyTotal Funding
$1.67BKey Investors
TPG GrowthLightspeed Venture Partners
2025-07-01Post Ipo Debt· $1.5B
2024-04-23Post Ipo Equity· $22.7M
2018-03-16IPO
Leadership Team
Jay Chaudhry
CEO, Chairman & Founder
Hemant Dabke
Area Vice President
Recent News
2026-01-09
Company data provided by crunchbase