Senior Staff Software Engineer (C / Networking / Dataplane)

About the role

We are looking for a Senior Staff Software Engineer (C / Networking / Dataplane) to join our Engineering Team. This is a Hybrid (San Jose, CA 3 days a week in office) role, reporting to the Senior Director, Software Development Engineering.

Responsibilities

• Design and implement Datapath features related to Load Balancer, Firewall rules and L7 Protocol implementations
• Apply deep knowledge of C programming, data structures, and algorithms to build high-performance systems
• Independently drive moderately complex projects from conception to deployment with full ownership
• Leverage expert knowledge of networking protocols and services including DNS, HTTP, TCP/IP, and SSL/TLS
• Utilize Unix or Linux operating systems knowledge to optimize networking and security applications

Requirements

• Demonstrated curiosity and active exploration of AI tools, with a proven history of integrating new technologies to enhance daily workflows and augment problem-solving
• 8+ years of experience building large-scale commercial networking and security applications with proficiency in programming languages C or C++
• Strong foundational knowledge in data structures and algorithms
• Working experience in Linux, Unix, or similar operating systems
• BS or MS degree in CS/CE or equivalent experience

Qualifications

• Exposure to AI-assisted software development tools and workflows, with the ability to apply them to improve engineering productivity and delivery quality
• Advanced knowledge of networking protocols and services, specifically DNS, HTTP, TCP/IP, and SSL/TLS

Skills

You act like an owner. Your passion for the mission fuels your bias for action. You operate with integrity because you genuinely care about the outcome. You adapt to what’s needed, navigating seamlessly between high-level strategy and hands-on execution.

You are a high-trust collaborator. You are ambitious for the team, not just yourself. You embrace our challenge culture by giving and receiving ongoing feedback—knowing that candor delivered with clarity and respect is the truest way to earn trust.

You are customer-obsessed. You build deep empathy for the customer—both internal and external—and anchor your decisions in solving their real-world problems. You champion their needs from start to finish, knowing their success is our success.

You operate with urgency. You understand that in a high-growth environment, speed and quality are not mutually exclusive. You have a relentless focus on execution and a bias for action, delivering high-impact results quickly to win for the customer and the team.

You think at scale. You connect your day-to-day work to the larger company mission and think globally. You build solutions, processes, and teams that are not just effective today but are built to last and support a high-growth, global organization.

Benefits

Zscaler’s benefits program is one of the most important ways we support our employees. We offer various health plans, time off plans for vacation and sick time, parental leave options, retirement options, education reimbursement, and in-office perks, among others.