Bastion Talent is retained by a specialist telecom and mobile-network security firm to fill this role. Our client works with mobile operators, governments and large enterprises to secure critical network infrastructure. 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 an independent, research-led telecom and mobile-network security specialist. For over a decade they have helped mobile operators, regulators, governments and cellular-powered enterprises secure critical network infrastructure across the full protocol stack — from legacy 2G/3G SS7 and SIGTRAN through 4G Diameter and GTP to IMS/VoLTE and 5G core, RAN and NFV. Their work spans offensive security (audits, penetration testing, red teaming) and defensive products (intrusion detection, attack-surface management and vulnerability intelligence), and their researchers contribute to international standards and industry groups. The team is lean, senior and fully distributed.
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)