Voice and Services Engineer (São Paulo / Rio de Janeiro)

About the role

1GLOBAL, a global mobile communications provider founded in 2022, is hiring a Voice and Services Engineer for its Networks & Engineering department, based in São Paulo or Rio de Janeiro with a hybrid workplace. As a member of the Network Engineering team, you will propose, analyse and define requirements for new and existing voice services, design, test and deliver solutions, and support the technology evolution roadmap.

Key responsibilities

• Collaborate with other Networks teams on projects for delivering new solutions, including project delivery, network design, integration and migration strategies, and end-to-end delivery.
• Design new consumer and corporate telecom solutions and create and maintain technical documentation (HLDs, LLDs, WO's).
• Implement solutions in live environments, follow end-to-end system testing requirements, and define quality and performance indicators.
• Define and implement service and resource configurations, and carry out capacity and performance analysis, reporting and improvement.
• Manage change requests to current partners and control the network elements roadmap, including software and hardware upgrades.
• Document the technology portfolio and propose improvements or alternatives.

Required profile

• Proven experience implementing live mobile telecom solutions (GSM, UMTS, LTE, IMS), network design, capacity management, engineering and architecture.
• Degree in Telecom Engineering, Computer Science or equivalent experience.
• English proficiency is mandatory; other languages are a plus.

Required skills

• NGN networks (MSS/MGW, HLR/HSS, SBC), voice interconnects (SIP/RTP), and IMS architecture (P/S/I-CSCF, application servers).
• Voice technologies: VoIP, VoLTE, VoWiFi, QoS, and SMS configuration and routing.
• Mobile services charging (offline, online), OCS, Ro, Ro+, Ga and Bp interfaces.
• Signaling gateways and protocols: SS7, SIGTRAN, MAP, CAMEL, Diameter/SCTP.
• Protocol analyzers such as Wireshark and Astelia; ETSI NFV; MVNO/MVNE/MVNA architectures.
• Nice to have: 3+ years in telecoms, previous experience with Nokia, Oracle and Ribbon IMS products.

What we offer

• CLT contract with quarterly performance bonuses.
• Meal allowance of R$100 per working day paid into a Caju card.
• Health insurance with SulAmérica, 50% covered by the company.
• Extended parental leave: 180 days maternity and 20 days paternity leave.
• Daycare allowance of R$500 per month per child for mothers with children under 3.