Voice Core Engineer (Circruit Switch Core / IMS / 5G) – Contract Opportunity

We're partnering with a leading Telecoms Engineering Services company to find an experienced Voice Core Engineer to support complex, large-scale network initiatives.

Location: Lisbon (2 days per week in-office)

Contract: 9 months

About the Role

You'll play a key role in the design, integration, and delivery of advanced Voice Core solutions across CS, IMS, and 5G domains, aligned with 3GPP standards and global architecture principles.

Key Responsibilities

• Lead technical design and specification of Voice Core hardware & software solutions
• Deliver integration, deployment, and expansion across platforms such as MSS/MGW, STP, DRA, HSS/HLR, SBC, CSCF, TAS, UDR, AUSF, UDM, IBCF
• Coordinate integration and acceptance testing for new software releases
• Contribute to low-level design documentation and implementation ...