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A First Point Group procura um Engenheiro de Voz Core com experiência em IMS/CS e redes centrais para manter e otimizar serviços de voz. O(a) candidato(a) ideal trabalhará com SBC, x-CSCF, TAS e outros nodos, contribuindo para a qualidade de chamadas VoLTE e VoWiFi.
A posição exige conhecimento de protocolos SIP, Diameter e RTP/RTCP, além de gestão de perfis de assinantes em HSS/HLR. Será útil familiaridade com Huawei, Ericsson, Nokia e outros fabricantes, e capacidade de atuar junto de equipas
Location:
Lisbon, Portugal Work Setup:
Hybrid – 2 days per week onsite Start Date:
ASAP Contract Duration:
Until March 2026 (with strong renewal history) Role Overview: We are seeking an experienced
with a strong background in IMS and CS core networks. The ideal candidate will have hands-on expertise in VoLTE architecture, signaling protocols, and core network nodes, and will play a key role in supporting and optimizing voice services.
Operate and maintain IMS/CS Voice Core network components including SBC, x-CSCF, TAS, BGCF, MGCF, MRF, MGW, MSC, IMMGW. Analyze and troubleshoot IMS voice flows and procedures (e.G., VoLTE-VoLTE calls, TADS, Homing, Break-in/out calls). Understand and manage subscriber profiles in HSS/HLR and their impact on network behavior. Work with VoLTE-related protocols: SIP, Diameter, DNS, H248, Camel, RTP/RTCP. Support VoLTE/VoWiFi architecture and concepts. Collaborate with cross-functional teams and contribute to customer-facing engagements.
Familiarity with HSS, HLR, CuDB. Experience with signaling transfer elements (DRA, STP). Knowledge of DNS/ENUM and Number Portability (NP). Exposure to vendor technologies: Huawei, Oracle, Ericsson, Mavenir, Nokia.
BSc or MSc in Electronics, Telecommunications, or Computer Engineering. Certifications from Ericsson, Huawei, Nokia, or Cisco are advantageous. Strong communication skills in
Portuguese and English. Proven ability to plan, prioritize, and work proactively in a team environment. Previous experience working with telecom operators in customer-facing roles. Seniority level
Mid-Senior level Employment type
Contract Job function
Staffing and Recruiting