Signaling Security Specialist

As Hungary’s most attractive employer in 2025 (according to Randstad’s representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. We have hundreds of large customers, corporations in Germany and in other European countries.   Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation. Project Description For an international team, we are looking for a signaling security & fraud specialist with high expertivse in telecommunication protocolls and networks, espacially SS7/SMS, Diameter, SIP and 5G HTTP2, GTP and Roaming technologies and services. The tasks involves: conception of security and fraud anomalie monitoring detection, analylises and mitigation of attacks conception and implementing countermeasures coordination with stakeholders Tasks configuration of new detection filters analysing of alerts discuss findings with stakeholders and implement countermeauseres Coordinate the evaluation and mitigation process with the responsible stakeholders Development of security policy focusing on signaling threats Evaluation of new telco signaling and signaling based fraud scenarios Qualifications Very good written and spoken English (C1), good German(min. B2) skills are desirable Expertisce in telecommuination signaling protocols (SS7, Diameter, GTP, 5GHTTP2, SIP) Knowledge in operational mobile and roaming services Experience in anomaly detection and fraud management solutions Security expertise in telecommunication networks Strong analytical and problem-solving skills High attention to detail to identify potential vulnerabilities and risks Ability to work in an environment with high confidentiality and sensitivity Willingness to pass selected privacy, security and risk management training and be committed to compliance with content Additional Information Advantages Experience in telecommunication network security Expirience with signaling firewalls, telco protocoll security monitoring systems Experience in network/carrier fraud management In-depth knowledge of fraud types, methods and techniques What our team offers to you:  Supportive colleagues locally and internationally  Knowledge expansion through trainings, professional certifications