Greylock 
Lightspeed 
SoftBank Vision Fund Security Researcher
Summary
Security Researcher on Cato Networks' Network Security Content team (Prague, hybrid, 3 days in office) who researches network protocols and application traffic (L4-L7) to create content signatures for SASE security products like NGFW, CASB, and DLP. Daily work centers on big-data traffic analysis, PCAP analysis with tools like Wireshark, and automation using Python/SQL or LLM-based coding workflow
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.
As a Security Researcher (Network & Apps research) you will research and investigate Network protocols and application traffic (L4-L7) using modern big data analysis frameworks, as well as network and web analysis tools (Wireshark, Fiddler, BurpSuite, DevTool).
You will be responsible for shaping and creating content signatures to Cato’s security and network products such as NGWF, CASB, DLP, iOT/OT Security and more.
Joining Cato is an excellent opportunity for network security enthusiasts who are passionate about the future of Networking and Security
Responsibilities:
- Research and analyze network and application behavior as part of Cato Network’s Security products (NGFW, CASB, DLP and more).
- Solving customers' problems and pains.
- Focus on delivery fast at scale.
- Suggest and conduct new research vectors
- Utilize Cato’s Data Warehouse with big-data technologies to support your work
- Automate your work to improve efficiency
Requirements:
- 3+ years of hands-on as an analyst/researcher experience in the cyber/security/network industry
- Knowledge of networking architecture, OSI model, and protocols (TCP/IP, DNS, TLS, HTTP) - a must
- Experience with LLM-based coding workflows OR expertise in at least one scripting language such as Python (Pandas, NumPy) - a must
- Experience with signature development for IPS or Firewall - big advantage
- Experience with SQL or data analysis tools – big advantage
- Experience (Hands-on) with Wireshark and PCAP analysis or similar tools
- Excellent English and communication skills
- Team player, responsible, and well-organized
Skills
As published by greenhouse · 4 questions
Basics
First Name, Last Name, Email, Phone, Resume/CV
Short answers (1)
- LinkedIn Profile optional
Pick from a list (3)
- How did you hear about Cato Networks? (Multiple Choice) optional
- Do you require visa support for the country that you applying to?
- I can attend the Prague office 3 times a week
