Hybrid Roaming IREG Engineer

at 1GLOBAL

• Job title: Roaming IREG Engineer
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Location requirements: Hybrid, Rio de Janeiro, Brazil

About the role

• Roaming IREG Engineer managing international roaming processes and procedures for a global mobile communications provider. Responsible for technical setup, testing, and maintenance of roaming services.

Responsibilities

• __****Key Responsibilities**__
• Plan, execute, and document IREG tests (IR.24, IR.35, IR.50, etc.) for voice, SMS, and data services, in line with GSMA standards.
• Set up and verify interconnect links for voice and messaging services with partner operators.
• Monitor roaming service KPIs, troubleshoot issues, and ensure compliance with roaming agreements.
• Configure and test SS7, Diameter, SIP, and related signaling protocols for international connectivity.
• Liaise with foreign operators, roaming hubs, and internal teams during implementation and troubleshooting.
• Maintain up-to-date test results, network configurations, and operational procedures.
• Oversee the footprint management of all 1Global products, working closely with the wholesale and other networks team.

Requirements

• **Must Have**
• Perform end-to-end roaming testing (voice, SMS, data, CAMEL, VoLTE, 5G roaming).
• Execute IREG test cases according to GSMA guidelines and bilateral agreements.
• Analyze and troubleshoot roaming issues with signaling traces and logs.
• Work closely with international roaming partners to resolve interconnect problems.
• Manage and update roaming documentation (IR.21)
• Support new roaming launches (testing and activation of new operators, technologies, and services).
• Coordinate with internal teams (Core Network, Billing, etc) during testing and troubleshooting.
• Validate TAP files and charging/billing aspects of roaming services.
• Monitor KPIs and performance of roaming services after launch.
• Follow-up and define Quality and Performance indicators for the entire roaming service.
• Close relationship with external partners like carriers, service providers.
• Have successful partnerships with other departments and teams.
• ****Qualifications**
• Degree in Telecom Engineering or Computer Science or equivalent experience
• Knowledge of 3GPP, ETSI, standards and specifications for SIM/eSIM
• Knowledge and experience with protocols such as MAP, S6a
• Familiar with an RSP architecture and experience operating it
• Knowledge in scripting and have basic programming skills.
• 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

Benefits

• **What we offer?**
• **CLT contract** — enjoy job stability and reliable benefits that value your work
• **Quarterly performance bonuses **to reward your hard work and achievements
• **Meal allowance paid into Caju card** — R$100 per working day
• **Health insurance with SulAmérica **— 50% covered by the company
• **Daycare allowance **provided to mothers with children under 3 years old — R$500 per month per child
• Kickstart your journey with an exciting welcome **onboarding trip to one of our European offices** (Lisbon or Berlin)!**