Principal Software Development Engineer (Layer 7 Security & Proxy)
Zscaler · Santa Clara, California, USA
About this role
## Zscaler — Principal Software Development Engineer (Layer 7 Security & Proxy) ### About the role Zscaler accelerates digital transformation with the Zscaler Zero Trust Exchange platform—an in-line, cloud security solution that protects users, devices, and applications across any location. We’re seeking a **Principal Software Development Engineer (Layer 7 Security & Proxy)** to provide technical leadership for the **ZIA proxy architecture**, with a strong focus on **advanced Layer 7 protocols** and **SSL inspection**. You’ll help improve production code quality through sound architectural decisions, innovative implementations, and raising the engineering bar. You’ll also modernize the ZIA codebase by addressing technical debt, fixing issues, and rewriting components as needed. **Location / Work model:** Hybrid — **minimum 3 days/week in Santa Clara, CA** ### What you’ll do - Support end-to-end **QUIC/HTTP/3** and **HTTP/2** proxy and **TLS/SSL** architecture in ZIA - Define and evolve the **ZIA proxy architecture** - Partner with Product Management and engineering on solution design, trade-offs, and end-to-end delivery of core ZIA functionality - Establish **reference architectures** and **design patterns** for ZIA components and integrations - Provide technical leadership, mentoring, and architectural governance across virtual and product teams ### Who you are (success profile) - Thrive in ambiguity—build the path as you go and turn dynamic environments into meaningful outcomes - Customer-obsessed—build empathy for internal and external users and anchor decisions in real-world problem solving - Driven by innovation—curious about complex technical challenges and focused on better, more secure, scalable solutions - Think at scale—connect daily work to the broader mission for a high-growth, global organization - Lead with integrity—hold high standards for accountability and build trust through consistent, transparent action ### Minimum qualifications - Foundational understanding of **AI/ML** technologies and experience leveraging, securing, or positioning AI-driven solutions to optimize outcomes - **12+ years** total experience with proven experience designing and implementing **networking security software** and **public cloud infrastructure** - Deep understanding of **Proxies**, **HTTP/2**, **QUIC**, **TCP/IP**, **TLS/DTLS**, and **SSL proxies** - Proficient in **C** - Demonstrated success designing, optimizing, and troubleshooting **high-throughput, low-latency** network security products - Bachelor’s degree in Computer Science, Information Technology, or related field ### Preferred qualifications - Proven ability to leverage AI technologies and workflows to drive measurable operational efficiency - Mastery of **TCP/IP, DNS, HTTP(s), VPN** technologies (**IPSec, SSL VPN**), **NAT**, and **load balancing** - Knowledge of **BSD/Linux**, virtualization technologies, and **DPDK** (or similar kernel bypass techniques) ### Base pay range (US) **$212,000 — $265,000 USD** (base salary; excludes commission/bonus/equity if applicable + benefits) ### Benefits (high level) - Various health plans - Time off plans (vacation and sick time) - Parental leave options - Retirement options - Education reimbursement - In-office perks and more ### Equal opportunity Zscaler is an equal opportunity employer and is committed to providing reasonable accommodations during the recruiting process.
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