Imagine working for a company where your growth is monitored every day, even from a distance. Where you are not just another number, but part of a constantly expanding team.We are more than 2430 Primers spread across the world, and we want onemore: YOU.We are looking for a Senior Voice Core Engineering & Delivery Engineer with:- Strong experience in Voice Core domains (CS, IMS, and 5G) - Solid expertise in network nodes: MSS/MGW, STP, DRA, HSS, HLR, SBC, CSCF, TAS, UDR, AUSF, UDM, IBCF - Deep understanding of telecom protocols: SIP, Diameter, SS7, MAP - Proven experience in integration, testing, and deployment of Voice Core solutions - Experience working in complex, multi-vendor and multi-market environments - Strong background in technical design (HLD/LLD) and solution documentation - Autonomous profile with strong technical leadership and mentoring skillsLocation: Lisbon | HybridLevel of Experience: Senior (+5 years)Salary Package & Benefits: €1,750 to €3,500 (base salary) + Food Allowance + Flex BenefitsIf you are ready for the next step in your career, send your CV to and join PrimeIT!