Sr. Staff Software Development Engineer

The role, as Zscaler, Inc. describes it

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform.

We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler.

Role

We are looking for a Senior Staff Software Development Engineer to join our team. This is a Santa Clara, CA role, reporting to the Director, Software Development Engineering in the Zero Trust Exchange department. We are hiring a Senior Staff Software Development Engineer to drive the evolution of our Client Connector Agent (CCA), a critical Windows client that provides secure connectivity, tunneling, and session management across enterprise and VDI environments. In this role, you will own core service-layer components including RPC, user session handling, and data pipelines to ensure CCA remains performant, scalable, resilient, and maintainable.

What you’ll do (Role Expectations)

• Design and implement features across the CCA service, user-mode UI, and supporting subsystems including the RPC server, session handler, data handler, and tunnel telemetry

• Diagnose and fix complex production issues such as service crashes, race conditions, lifetime bugs, and cross-process synchronization problems

• Improve reliability of long-running Windows service code including cleanup/shutdown paths and inter-process communication

• Work on VDI-specific flows including ZCC VDI SMB tunnel traffic accounting and session lifecycle management

• Review peers' code, raise the quality bar, and mentor other engineers on Windows systems programming

Who You Are (Success Profile)

• You thrive in ambiguity and see dynamic, complex environments as an opportunity to build meaningful solutions.

• You act like an owner, driving initiatives forward with passion, integrity, and a strong bias for action.

• You are a high-trust collaborator who embraces a challenge culture with clear, respectful, and constructive feedback.

• You are customer-obsessed, grounding engineering decisions in deep empathy to solve real-world problems.

• You champion simplicity by distilling complex technical concepts into clear, actionable plans.

What We’re Looking for (Minimum Qualifications)

• Foundational understanding of AI/ML technologies and experience leveraging, securing, or positioning AI-driven solutions to optimize outcomes within your functional domain

• 8+ years of production software engineering experience with strong C++ (C++14/17) expertise

• Solid grasp of Windows internals including services, user sessions, security tokens, IPC, and process/thread lifetime

• Experience debugging multithreaded C++ including races, deadlocks, iterator invalidation, and use-after-free

• Proficiency with diagnostic tools like WinDbg, ETW, Process Monitor, and crash dump analysis

• Track record of shipping and maintaining an enterprise desktop or endpoint product

What Will Make You Stand Out (Preferred Qualifications)

• Proven ability to leverage AI technologies and workflows to drive measurable operational efficiency

• Deep background in networking, VPN, ZTNA, or secure tunneling architectures

• Experienc

Read the full advert and apply on Zscaler, Inc.’s site →