Voice and Data Core Network Security Architect (5G)

Location: Lisbon, Portugal. Flexible hybrid work model with 8–10 in-office days per month.

Company

hirify.global is an international telecommunications company developing connectivity services and network technologies for millions of customers across global and local markets.

What you will do

• Provide security architecture support for packet core migration to Single Packet Core and 5G Core architectures across multiple markets.
• Support secure deployment of 5G Standalone and roaming, including mTLS, PKI, and protection of internal and interconnect interfaces.
• Guide IMS and voice core transformation programmes, including supplier changes, new product introductions, and NG-eCall rollout.
• Lead security solution design projects and communicate risk mitigation requirements to business and technical stakeholders.
• Assess suppliers, platforms, and vendor roadmaps from a security perspective.
• Contribute to global telecom security standards, roadmaps, hardening guidance, compliance tooling, and industry standards work with 3GPP and GSMA.

Requirements

• Bachelor’s or Master’s degree and a technical qualification in fixed and/or mobile technologies.
• Strong background in mobile core network security, ideally covering packet core, 5G Core, and IMS/voice core environments.
• Good understanding of 5G Standalone, roaming security, mTLS, PKI, virtualization in telecom environments, and protection of internal and interconnect interfaces.
• Understanding of telecom regulatory security expectations, including UK TSA, NCSC, Ofcom, UKTL, BSI, GSMA, 3GPP SCAS, and ETSI guidance.
• Experience defining security standards, hardening guidance, compliance approaches, and security testing methods.
• Fluent English and excellent communication skills for explaining complex security risks to senior internal and external stakeholders.

Nice to have

• Professional qualification in Prince2, SAFe, APMG, MSP, or ITIL, or significant equivalent experience.
• Experience with Microsoft Excel, PowerPoint, ADO, and Project.
• Experience with NEF deployment, NaaP integration, and hyperscaler proof-of-concepts.

Culture & Benefits

• Work with a global and diverse telecommunications community across local markets and central platforms.
• Mobile phone, free communication plan, data card, and discounts on products and services.
• Well-being programme with nutrition and psychological consultations, webinars, workshops, and discounts.
• Access to Communities of Practice and a digital learning platform with content from Harvard Business Publishing, Skillsoft, and Speexx.
• Local and international internal mobility and rotation opportunities.
• Recognition programmes for innovation, creativity, high potential, and exemplary behaviour.