Roaming IREG Engineer

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GLOBAL is a technology-driven global mobile communications provider dedicated to empowering enterprises worldwide to unlock the full growth potential of mobile connectivity. With a best-in‑class telecom technology platform, a comprehensive suite of globally viable regulatory licenses, and privileged access to the telecom wholesale market, 1

GLOBAL is uniquely positioned to deliver seamless compliance and connectivity solutions. Serving the world’s leading banks, corporations, and digital‑first businesses—including neo‑banks, travel companies, and payment service providers—1

GLOBAL connects over 43 million devices globally.

With 2024 full-year revenue exceeding US $100 million and in line to exceed US $200 million in FY25, 1

GLOBAL is a profitable business generating significant cash flows to fund its ongoing investments in infrastructure, transformation, and growth. 2024 saw major client wins and marked 1

GLOBAL’s evolution from a multi‑market telecommunication provider to a global technology‑driven mobile connectivity powerhouse.

Established in 2022 by experienced tech founders and entrepreneurs Hakan Koç and Pyrros Koussios, 1

GLOBAL is a European technology leader driving digital transformation in the global telecommunications market. It operates as a fully regulated Mobile Virtual Network Operator (“MVNO”) in ten countries and as a regulated telecommunications operator in an additional 31 countries. Headquartered in the Netherlands, with world‑class R&D hubs in Lisbon, Berlin, and São Paulo, 1

GLOBAL employs over 450 experts across 15 countries.

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Global is seeking a talented and detail‑oriented Roaming

IREG Engineer to manage the entire roaming process and procedures. As an IREG Engineer you will be responsible for the technical setup, testing, and maintenance of international roaming and interconnect services. We’re looking for a proactive individual with a strong technical foundation, adept at troubleshooting support cases and enhancing operational processes for seamless footprint updates.

• 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 1
  
  Global products, working closely with the wholesale and other networks team.

• 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.

• Degree in Telecom Engineering or Computer Science or equivalent experience.
• Knowledge of 3
  
  GPP, 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 network errors/problems…