Senior Software Engineer (C, Networking)

Zscaler•San Jose, CA

1d•Hybrid

About The Position

Zscaler is a pioneer and global leader in zero trust security. The world’s largest businesses, critical infrastructure organizations, and government agencies rely on Zscaler to secure users, branches, applications, data & devices, and to accelerate digital transformation initiatives. Distributed across more than 160 data centers globally, the Zscaler Zero Trust Exchange platform combined with advanced AI combats billions of cyber threats and policy violations every day and unlocks productivity gains for modern enterprises by reducing costs and complexity. Here, impact in your role matters more than title and trust is built on results. 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 champion an “AI Forward, People First” philosophy to help us accelerate and innovate, empowering our people to embrace their potential. If you’re driven by purpose, thrive on solving complex challenges and want to make a positive difference on a global scale, we invite you to bring your talents to Zscaler to help shape the future of cybersecurity. We are looking for a seasoned Senior Software Development Engineer to join our team. This is a hybrid role based in San Jose, CA (3 days a week), reporting to the Director, Software Engineering within the Digital Experience department. Our Engineering team built the world’s largest cloud security platform from the ground up, and we keep building. You will bring your vision and passion to our team as you design and code components of a large-scale distributed system, enabling organizations worldwide to harness speed and agility with a cloud-first strategy.

Requirements

3+ years of software development experience in programming with C, Python, or high-level languages
Experience in software development on Unix/Linux systems
Experience working with REST APIs and API gateways
Knowledge of L4 to L7 network topologies and TCP/IP networking stacks
Familiarity with observability and monitoring products

Nice To Haves

Strong fundamentals in operating system concepts, event-based programming, multi-threading, memory optimization, and fault tolerance
Familiarity with endpoint security and firewalls
Experience developing agent-based AI applications and LLM models

Responsibilities

Participating in all phases of the product development cycle, from definition and design to implementation and testing
Developing functional specifications, assessing task requirements and schedules, and contributing to development, debugging, and support
Designing and coding components of a large-scale distributed system with a focus on high performance and scalability, and troubleshooting issues efficiently
Collaborating with feature teams, Operations, and Support to maintain a healthy cloud environment and ensure customer satisfaction
Demonstrating accountability and ownership for areas assigned to you