Principal SWE, Windows & macOS Client Development

About Zscaler Zscaler accelerates digital transformation to ensure our customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise , we are constantly pushing the envelope, leveraging the world’s largest security data lake to power our cloud-native Zero Trust Exchange platform. This innovation protects our 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 say, impact over activity. We seek innovators who actively use AI to amplify their impact and who thrive in an environment where we leverage intelligent systems to stay ahead of evolving threats. 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 be part of the team that’s helping to secure the AI age, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity. We are looking for a Principal Software Development Engineer to join our Zero Trust Exchange department in a hybrid capacity at our San Jose, CA office, reporting to the Sr. Manager, Software Development Engineering. In this role, you will implement high-impact ZCC tunnel features that enhance connectivity and security for our global user base. Additionally, you will lead the modularization of existing code into libraries to improve system maintainability and architectural stability. What you’ll do (Role Expectations) Work on networking components in ZCC across all platforms Write highly scalable and testable code with the assistance of AI Debug customer issues utilizing state-of-the-art tools and AI Who You Are (Success Profile) You are a problem-solver. You seek out challenges because you are energized by finding solutions, knowing that solving the hard problems delivers the biggest impact. You are a learner. You have a true growth mindset and never stop developing yourself, actively seeking feedback to become a better partner and a stronger teammate. You love what you do and you do it with purpose. You are a positive force. You approach hard problems with constructive energy and a 'can-do' spirit that is contagious, inspiring your team to stay focused on the solution. 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 lead with integrity. You do the right thing, even when it’s hard. You hold yourself and others to a high standard of accountability and build trust by matching your words with consistent, transparent action. What We’re Looking for (Minimum Qualifications) Strong C, C++, or Rust development experience Experience with both Windows & macOS Client Development Robust networking knowledge and engineering experience Demonstrated experience utilizing AI models for debugging and code generation What Will Make You Stand Out (Preferred Qualifications) Experience working within the Client VPN space Advanced expertise in networking architectures and C++ or Rust development Strong experience working with AI agents #LI-JM1 #LI-Hybrid Zscaler’s salary ranges are benchmarked and are determined by role and level. The range displayed on each job posting reflects the minimum and maximum target for new hire salaries for the position across all US locations and could be higher or lower based on a multitude of factors