Senior Staff Software Engineer – C and IPSec

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. Role We are looking for a Senior Staff Software Development Engineer to join our team. This is a Hybrid role based in Bangalore, reporting to the Senior Manager, ZIA Core Engineering. You will make ZIA software run in public cloud infrastructure by bringing strong public cloud knowledge, technical expertise in network security, hands-on development experience, and proven leadership capabilities. You will bring your vision and passion to our team of experts who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy through the world's largest cloud security platform. What you’ll do (Role Expectations) Participate in the design, development, and optimization of firewall/SWG platforms in Cloud Infrastructure Execute the technical roadmap for firewalls/SWG in Cloud Infrastructure, ensuring alignment with business goals Work closely with engineering teams to enhance platform support for virtualized environments Drive professional development and growth initiatives for team members Who You Are (Success Profile) You thrive in ambiguity and feel comfortable building the path as you walk it, seeing dynamic environments not as a hindrance but as raw material to build something meaningful. You act like an owner, letting your passion fuel a bias for action while navigating seamlessly between high-level strategy and hands-on execution. You are a tenacious problem-solver who seeks out challenges, knowing that finding solutions to the hardest problems delivers the biggest impact. You are a high-trust collaborator who is ambitious for the team, embracing our challenge culture by giving and receiving ongoing feedback with clarity, candor, and respect. You are a learner with a true growth mindset, actively seeking feedback to continuously develop yourself, become a stronger teammate, and work with purpose. 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 experience in designing and implementing networking security software and public cloud infrastructure Direct experience working on C programming and firewall or SWG technology Experience in designing how NGFW/SWG solutions integrate with or extend native public cloud services, including Firewall/IPS, FreeBSD, and OpenSSL Strong understanding of VPN, Tunneling, IPSec, and IKEv1/v2 protocols What Will Make You Stand Out (Preferred Qualifications) Mastery of network security…