Signalling Security Specialist

🕒 August 26

🇫🇷 France – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

👮‍♂️ Cybersecurity / Security Engineer

👻 Ghost score 18%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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P1 Security

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2011

📡 Telecommunications

🔒 Cybersecurity

🔐 Security

💰 Seed Round on 2011-01

Telecommunications • Cybersecurity • Security

P1 Security is a leading company in mobile network security, providing solutions to defend against network cybersecurity threats and attacks. Founded in 2009, the company specializes in securing telecom protocols and offers products and services like intrusion detection systems, vulnerability scanning, and threat management. P1 Security assists operators, governments, and enterprises in securing their mobile infrastructure, particularly focusing on technologies from 2G to 5G.

📋 Description

• Support and operate P1 Security solutions in production contexts, notably PTM and VKB • Conduct signalling security audits using proprietary PTA tooling • Scope audits, including objectives, perimeter, constraints, timelines, and deliverables • Prepare safe execution plans and operational safeguards • Execute signalling security audits in a controlled manner • Analyze results, validate findings, and assess exploitability and root cause • Draft technical reports in English and present findings to customers • Act as a technical point of contact for customers through scoping, updates, and delivery • Deliver presentations, training, and debrief sessions • Provide IT support for the PTM IDS through customer ticket workflows • Troubleshoot and maintain PTM deployments, including Linux and virtualization layers • Operate and improve tooling and scripts for investigations, maintenance, and deployments • Collaborate with Engineering and R&D to improve tooling, detection quality, and operational processes • Maintain internal documentation and handover notes

🎯 Requirements

• Ability to draft professional, structured technical reports and slide decks in English • Strong verbal communication skills for presenting and interacting directly with customers • Solid understanding of telecom core architecture, roaming concepts, and signalling security in real operator environments • Ability to read and reason about SS7/SIGTRAN, Diameter, LTE/IMS, and GTP-C call flows • Ability to connect traces/observations to concrete security findings • Familiarity with GSMA Fraud & Security standards, notably FS.11, FS.19, and FS.20 • Ability to translate standards requirements into test cases, evidence collection, and actionable remediation • Mastery of roaming signalling attacks and call flows • Comfortable using a terminal and basic Linux commands • Proficiency in Python for one-off analysis or testing scripts • Ability to write and maintain Bash/shell scripts for operational needs • Experience with Linux and ESXi/VM operations is a plus • Customer-centered, autonomous, rigorous, and proactive mindset • Ability to work with Central European Time overlap preferred

🏖️ Benefits

• Remote-first team • Preference for candidates who can overlap working hours with Central European Time