Voice & Services Architect – Global Mobile Core

1global; Porto; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

1GLOBAL is expanding its voice and services team in Porto, focusing on design, testing and deployment of next-generation mobile core networks. You will define requirements, implement end-to-end solutions, and produce technical documentation to support lifecycle management.

The role demands hands-on experience with GSM/UMTS/LTE/IMS, SIP/RTP, and signaling protocols, plus a strong grasp of 3GPP/GSMA standards and NFV concepts. English fluency is required; OSS/BSS collaboration is common.

Qualifications

• Proven experience in live mobile telecom solutions design and deployment (GSM/UMTS/LTE/IMS).
• Strong knowledge of 3GPP/GSMA/ITU standards and network architectures.
• Experience with NGN-based networks incl. HLR/HSS/SBC/MSS/MGW and SIP/RTP.
• Experience defining voice interconnects and QoS.
• Understanding IMS architecture; familiarity with VoIP/VoLTE/VoWiFi.
• Experience with SMS routing/configuration.
• Knowledge of Diameter/SCTP and signaling gateways incl. SS7/SIGTRAN/MAP/CAMEL.
• Proficiency with protocol analyzers (Wireshark) for troubleshooting.
• Familiarity with ETSI NFV and MVNO architectures.
• Proficient in English; degree in Telecom/CS required.

Responsibilities

• Collaborate with Networks teams to define and deliver new solutions.
• Lead end-to-end project delivery including network design and migration strategy.
• Design new consumer and corporate telecom solutions.
• Create and maintain technical documentation (HLD/LLD/WO).
• Implement solutions in live environments and verify end-to-end testing.
• Define quality and performance indicators; drive improvements.
• Analyze capacity and performance; implement optimization plans.
• Configure services and resources across systems as required.
• Address cross-team processes and partner change requests.
• Maintain an up-to-date view of technology portfolio and evolutions.

Skills

GSM/UMTS/LTE/IMS

3GPP/GSMA/ITU standards

NGN networks

SIP/RTP

IMS architecture

VoIP/VoLTE/VoWiFi

Diameter/SCTP

Signaling Gateways (SS7/SIGTRAN/MAP/CX

Wireshark/Astelia

ETSI NFV

MVNO/MVNE/MVNA

English proficiency

Telecommunications or CS degree

Education

Bachelor's degree in Telecom Engineering or Computer Science

Job description

1GLOBAL is expanding its voice and services team in Porto, focusing on design, testing and deployment of next-generation mobile core networks. You will define requirements, implement end-to-end solutions, and produce technical documentation to support lifecycle management.

The role demands hands-on experience with GSM/UMTS/LTE/IMS, SIP/RTP, and signaling protocols, plus a strong grasp of 3GPP/GSMA standards and NFV concepts. English fluency is required; OSS/BSS collaboration is common.