Network Systems Performance Engineer 

Welcome to the future of cloud networking and security!

Cato Networks is the first company to converge enterprise networking and security into one centralized and global service that is delivered by cloud. It is led by networking and security pioneer Shlomo Kramer (Check Point, Imperva) and early investor (Palo Alto Networks, Exabeem, Trusteer and more). Cato’s unique technology inspired a brand-new product category, later named “SASE” by Gartner and a market expected to reach $28.5 billion by 2028.

This is your opportunity to get on the rocket ship and join a company that is building a cutting-edge enterprise network and secure cloud platform, and is on a fast track to becoming the worldwide market leader – don’t miss it!

We’re looking for a highly skilled Network Systems Performance Engineer to join our R&D Quality and Performance group. In this role, you will design and execute performance, scalability, and reliability tests for our client networking and security components across multiple platforms.
You will work closely with Development, QA, Product, and Architecture teams to evaluate system performance under diverse network conditions and ensure our client software meets high standards of stability, quality, and efficiency.

Responsibilities

• Define, design, and execute performance, scalability, load, throughput, and stress tests for client network functionality across multiple operating systems

• Build and maintain performance testing environments, including physical and virtual lab setups, network simulators, and traffic generation systems

• Evaluate the behavior and performance of client networking and security workflows in various operational and environmental scenarios

• Simulate and analyze diverse network conditions, including jitter, packet loss, bandwidth variations, latency profiles, and connectivity constraints

• Analyze CPU, memory, and other resource utilization across different OS platforms to ensure efficient and stable client performance

• Collaborate with R&D teams to identify bottlenecks, investigate performance issues, and drive improvements in architecture and implementation

• Prepare documentation, test methodologies, and clear performance reports for technical teams and stakeholders

• Contribute to ongoing enhancement of performance testing tools, methodologies, and lab infrastructure

• Develop Scripts in Python, Bash, or PowerShell. Alternatively Java - advantage

Requirements:

• 4+ years of hands-on experience in performance engineering, networking QA, system testing, or similar roles

• Strong understanding of networking concepts, including TCP/IP, DNS, routing, traffic flows, and modern networking stacks

• Experience testing or working with endpoint security components or related networked client systems

• Deep knowledge of Layers 3–7 behaviors and performance characteristics

• Proficiency in scripting languages (Python, Bash, PowerShell) and Java development skills – advantage

• Understanding of major operating systems (Windows, macOS, Linux, Android, iOS) and their networking models

• Hands-on experience with network analysis or traffic-generation tools (Wireshark, iPerf, NetEm/WAN emulation tools, etc.)

• Hands-on experience with virtual environments such as VMware ESX, AWS, Azure, or equivalent

• Ability to design, maintain, and operate physical test labs, including multi-device, multi-network configurations and complex system setups

• Excellent analytical, troubleshooting, communication, and documentation abilities

• Ability to work in a fast-paced, multi-tasking environment

• Academic degree in Computer Science, Computer Engineering, or equivalent experience