Voice and Services Engineer - São Paulo/Rio de Janeiro Based
1GLOBALBrazil
Posted February 23, 2026
Full Time
About the Company
1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers.
Job Description
1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers. The company is seeking a Voice and Services Engineer to join its team in Rio de Janeiro, Brazil. The successful candidate will be responsible for proposing, analyzing, and defining the requirements for new and existing services and systems related to voice systems, and will design, test, and provide new solutions or product changes to the existing portfolio.
Requirements
- Proven experience on implementation of live solutions on mobile telecom (GSM, UMTS, LTE, IMS), networks design, capacity management, engineering and architecture
- Knowledge of 3GPP, GSMA, ITU standards and specifications
- Experience in the design, test and operation of NGN based networks, including MSS/MGW, HLR/HSS, SBC
- Experience in defining, establishing and maintaining voice interconnects, SIP/RTP based
- Understanding about IMS architecture. Knowledge about VoIP, VoLTE, VoWiFi, and QoS
- Experience with SMS service configuration and routing
- IMS Architecture with understanding of IMS nodes including P/S/I-CSCF, Application Servers
- IMS Protocol Interfaces – GM Interface, ISC interface, Sh Interface, Cx, SOAP/XML, etc.
- Experience in mobile services charging (offline, online). Knowledge and experience of OCS and, Ro, Ro+, Ga and Bp interfaces
- Knowledge and experience with Diameter/SCTP networks and protocol
- Knowledge and experience with Signaling Gateways and protocols including SS7, SIGTRAN, MAP and CAMEL
- Experience with protocol analyzer tools like Wireshark, Astelia, and ability to use them to troubleshoot networks errors/problems for the mentioned protocols
- Experience with ETSI NFV architecture and solutions
- Familiar with MVNO/MVNE/MVNA architecture(s) and landscape
- English proficiency mandatory, other languages are a plus
- Degree in Telecom Engineering or Computer Science or equivalent experience
Benefits
- CLT contract
- Quarterly performance bonuses
- Meal allowance paid into Caju card
- Health insurance with SulAmérica
- Extended parental leave
- Daycare allowance provided to mothers with children under 3 years old