Security Researcher
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Before you apply
LocationPrague, Czech Republic
Work modehybrid
Typefull-time
SeniorityMid
Experience3+ yrs
DepartmentEngineering - Research
Company size501–1,000 people
PostedMar 18, 2026 · 7mo ago
Verified live2d ago
May no longer be actively hiring
Posted by the company on Mar 18, 202640% of this company's open roles have been listed for 90+ days
At a glanceSummarised by Seekless from the posting.
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)
Experience with LLM-based coding workflows OR expertise in at least one scripting language such as Python (Pandas, NumPy)
Experience (Hands-on) with Wireshark and PCAP analysis or similar tools
Excellent English and communication skills
Team player, responsible, and well-organized
Experience with signature development for IPS or Firewall
Experience with SQL or data analysis tools
Skills
Wireshark
Fiddler
BurpSuite
DevTool
Python
Pandas
NumPy
SQL
LLM
IPS
Firewall
TCP/IP
DNS
TLS
HTTP
About the company
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.
About the role
We are looking for proactive, analytical talented people to join our Cato Network Security Content team.
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
*We operate in a hybrid model, requiring three days in the office.
*Location: NR7, Náměstí republiky, Prague, Czech Republic