Role: Architect Voice, Mobile Roaming & IoT

Work Experience: 15+ Years

Location: Hyderabad, Begumpet India

Department: Information Systems – IoT, Voice & Roaming Architecture.

About the Role:

We are seeking a highly experienced and visionary Architect to join the Voice, Mobile Roaming, and IoT Architecture group within iBASIS. In this strategic role, you will lead the endtoend architecture, design, and evolution of our global Voice, Roaming, and IoT platforms.

You will define technical roadmaps, drive crossdomain solution architecture, and ensure the scalability, reliability, and security of all signaling, roaming, and IoT services. This role is central to iBASIS’s mission to remain a global leader in IPX, mobile roaming, and nextgeneration IoT connectivity.

You'll Bring:

1. Bachelor’s or master’s degree in electrical engineering, Telecommunications, or Computer Science with 15+ years of experience in the telecommunications domain.
2. Deep expertise in Voice (TDM & VoIP), Mobile Roaming, and IoT architectures, including endtoend service design.
3. Extensive handson and architectural experience with 3G, 4G, and 5G signaling: MAP, Diameter, SIP/IMS, HTTP/2, GTPC/U, SBA interfaces, and interworking models.
4. Strong understanding of roaming technologies, including SS7, Diameter Roaming, LTE/VoLTE Roaming, 5G interface, IPX models, and fraud/security frameworks.
5. Proven experience designing and integrating mobile core systems such as HLR/HSS, STP/DRA, SMSC, MME/AMF, SGW/UPF, PGW/SMF, IMS Core, SBCs, and GTP proxies.
6. Expertise in IoT connectivity architectures, eSIM/eUICC, CMP platforms, SIM provisioning flows, and GSMA M2M/IoT standards.
7. Ability to lead crossfunctional engineering teams,



influence stakeholders, and drive architectural governance.
8. Robust analytical mindset with the ability to be highest level of knowledge for troubleshooting complex signaling and roaming issues across multivendor environments.

Good to Have:

1. Experience working with telecom operators, carriers, or global IPX providers.
2. Active participation or collaboration with GSMA, 3GPP, IETF, or similar standards bodies.
3. Strong documentation and architectural modeling skills (UML, sequence flows, highlevel and lowlevel design).
4. Experience with eSIM/Remote SIM Provisioning, SIM Toolkit, and GSMA SGP.02/22/32 specifications.
5. Familiarity with REST APIs, microservices, and cloudnative architectural patterns.

Likely to Have

1. Strong background in IP networking, routing protocols (BGP, OSPF), MPLS, VPNs, and interconnect architectures.
2. Handson experience with scripting or automation (Python preferred) for testing, validation, and network automation.
3. Working knowledge of network and signaling test tools such as Spectra, Wireshark, Comprion, Keysight, Spirent, or similar.
4. Experience designing or operating largescale distributed systems with high availability and low latency requirements.

WHY US:

The iBASIS Global Access for Things portfolio uses GSMAstandardized eSIMs to provide global access with a single SIM and policydriven control. Leveraging deep relationships with mobile network operators worldwide, iBASIS is a disruptive force in the IoT and roaming industry.

In this rapidly expanding domain, you will have the opportunity to shape the future of global connectivity and help position iBASIS as the market leader in IoT, Voice, and Roaming solutions.

📌 Architect Voice, Mobile Roaming & IoT (Hyderabad)
🏢 IBASIS
📍 Hyderabad