Bastion Talent is retained by a specialist cybersecurity firm working in critical infrastructure to fill this role. Our client works with large organisations — operators, governments and enterprises — to find and fix serious security weaknesses. The client’s identity is shared with shortlisted candidates under NDA.
Engagement & location
This position is fully remote within Europe (CET overlap preferred). Unless otherwise stated, it can be structured either as a freelance / contract engagement or as full-time employment — whichever suits you.
About the client
Our client is a specialist cybersecurity firm and a recognised leader in offensive security for critical infrastructure. They help large organisations — operators, governments and major enterprises — find and fix serious weaknesses in the systems that keep essential services running, pairing hands-on security assessment with their own detection and analysis tooling. The team is small, highly technical and fully distributed across Europe.
The role
You will work closely with clients to deploy, maintain and improve advanced telecom security tooling — a telecom intrusion detection system (IDS), an attack-surface-management and vulnerability-scanning platform, and a telecom vulnerability knowledge base. The role combines hands-on technical work with customer engagement, so strong communication is essential.
Key responsibilities
- Act as a primary technical contact for clients: deployment, integration, training and onboarding.
- Maintain, troubleshoot, upgrade and enhance a telecom intrusion detection system.
- Use the vulnerability knowledge base to analyse, document and address threats.
- Operate and improve attack-surface-management and vulnerability-scanning tools.
- Monitor alerts, run in-depth analysis and give clients actionable recommendations.
- Work with engineering and R&D to improve tooling; produce clear incident and analysis reports.
What we’re looking for
- Strong grounding in IT and telecom security principles.
- Experience with telecom protocols and signalling: SS7, SIGTRAN, Diameter, LTE, IMS, GTP-C.
- Hands-on experience with IDS, vulnerability scanners and attack-surface-management tools.
- Traffic analysis and packet inspection.
- Bonus: Python, Lua or C for tooling; exposure to distributed-systems design.
- Fluent English (mandatory); a second language is a plus.
Hiring process
- Intro call (10–20 min)
- Hiring-manager call (30 min)
- Role-specific exercise
- Final call with leadership (30 min)