Senior Software Engineer (C)

Cato Networks; United States; On-site; USD 150,000 - 190,000; Full time

Job summary

Cato Networks is seeking a Senior Software Engineer to design and develop in-house operating systems and platforms powering our backbone cloud data centers and edge devices. You will work across hardware ranges from embedded to high-end servers, championing performance, security, and scalability.

Join a team shaping enterprise security with a cloud-native platform. Bring deep Linux kernel knowledge, C expertise, and a passion for open-source solutions to accelerate innovation at scale.

Qualifications

• 6+ years hands-on experience as a senior software developer in large-scale networks or security.
• Deep knowledge of Networking Protocols and Environment.
• Strong proficiency with C in a multithreaded environment.
• Experience integrating open-source software and packages.
• Experience with implementing new hardware solutions and specs.
• Deep Linux kernel knowledge and hardware-software interface.
• Passionate about performance and system internals from Makefiles to bios.
• Expert in designing and building highly scalable services in SMP environments.
• Strong collaboration and communication skills.
• Ability to learn new material and pioneer technology at Cato.

Responsibilities

• Design and implement operating system utilities and components for a performant, secure, and transparent cloud ecosystem.
• Proactively track low-level networking, kernel, and open-source trends and adapt solutions.
• Investigate and test performance to maximize hardware capabilities.

Skills

Networking

Kernel internals

C programming

Linux systems

Open-source integration

Performance tuning

SMP scalability

Team collaboration

Job description

Cato Networks is the converged network and security cloud for the AI era.

As AI reshapes cybersecurity, enterprises face a dual challenge: unlocking AI's potential while defending against AI-driven attacks. Cato addresses both through a unified, cloud-native platform, providing the visibility and context to prioritize risks and stop threats in real time across users, applications, data, and AI agents.

Join us as we scale: take on ambitious technological challenges and shape the next generation of enterprise security at a company trusted by thousands of organizations worldwide.

We're looking for a bright and passionate Senior Software Engineer to join our R&D Core team. In this critical role, you will design and develop solutions for in-house operating systems and platforms building our backbone cloud data centers and our edge on-prem devices. Cato solutions are run on a variety of hardware, ranging from small, embedded devices, to high-end servers, and cloud environments.

Responsibilities

• Design and implement operating system utilities and components to ensure a performant, stable, secure, maintainable, and transparent ecosystem in our cloud
• Proactively be on top of new emerging technological trends in low-level networking, hardware, kernel, and open-source themes. Implement and specialize in open-source solutions to specific Cato needs.
• Investigate and test performance capabilities aiming at "squeezing the lemon" out of our hardware

Requirements

• At least 6 years of experience as a hands-on senior software developer of a large-scale network or security solution.
• In-depth knowledge of Networking, Network Protocols and Environment
• Strong proficiency with C in a multithreaded environment
• Experience in integration with open-source software and packages
• Experience with implementing new hardware solutions and the ability to consume programmers guides and specs
• Deep working knowledge with Linux systems, utilities, customizability options, and deep understanding of kernel internals, hardware-software interface, and system resource management
• Passionate about demystifying performance, and the system internals from smallest Makefile flags and bios configurations and up to holistic integrated solutions with many moving parts
• Expert in designing and building highly scalable services, particularly in SMP environments
• A team player with excellent collaboration and communication skills
• Ability to learn new material and be the pioneer of new technology introduced and adopted by Cato