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Sr. Staff Software Development Engineer - C, Load Balancers, Firewalls

Zscaler

$154,000 - $220,000
Nov 19, 2025
San Jose, CA, USA
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Zscaler accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The ZIA Cloud team is working on firewalls and cross-product features between ZIA and ZPA to present greater value than its parts.

Requirements

  • 8+ years of experience in designing and implementing networking security software and public clouds infrastructure
  • Experience in Load balancers, IPS/IDS, Routers, Firewall products
  • Expert-level programming skills in C/UNIX/RTOS
  • Strong in fundamentals - TCP/IP, HTTP, QUIC, QUIC
  • Experience with High performance Computing, Event based programming, Fault Tolerance etc.
  • Experience in SaaS based Firewall/SWG solutions
  • Experience solving Performance and Scaling bottlenecks

Responsibilities

  • Participate in design, development, and optimization of firewall and in Cloud Infrastructure
  • Execute the technical roadmap for firewalls, ensuring alignment with business goals
  • Communicate technical solutions to all levels within-group and cross-discipline. status reporting and presenting solutions is an integral part of the job
  • Own the feature you are responsible for all the way to deployment and operations.
  • Ensure performance, security, scale, reliability, operational and cost optimization criteria are met

Other

  • This is a hybrid role going into the San Jose, CA office 3 days a week.
  • Reporting to the Senior Director, Zscaler is committed to providing equal employment opportunities to all individuals.
  • We foster an inclusive environment that values all backgrounds and perspectives, emphasizing collaboration and belonging.
  • Join us in our mission to make doing business seamless and secure.
  • Zscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled, have long term conditions, mental health conditions or sincerely held religious beliefs, or who are neurodivergent or require pregnancy-related support.