System Integration Engineer

3 weeks ago

Gurugram, India U2opia Mobile Full time

About the Role

We are looking for a System Integration Engineer with strong experience in telecom core networks and system integration to lead the design and development of a new Entitlement Server supporting SIM-based silent authentication. This is a strategic R&D role where you will work closely with our backend and product teams to build a carrier-grade platform that interfaces with mobile operator infrastructure.

This role is ideal for someone who understands telecom protocols, knows how to integrate with HSS/AAA systems, and can design backend systems even if not hands-on coding daily.

Role & responsibilities

  • Own the system architecture and integration design for the entitlement server.
  • Work closely with mobile network operators to understand their HSS/HLR, AAA, and core integration requirements.
  • Design and review APIs that enable SIM/eSIM-based silent authentication flows.
  • Guide developers and ensure compliance with GSMA TS.43 and 3GPP standards.
  • Lead technical discussions and interface with security, backend, and cloud teams.
  • Support internal and external testing, audits, and pilot deployments.

Preferred candidate profile

  • Should have experience in telecom systems or core network software.
  • Strong understanding of mobile authentication (EAP-AKA/ SIM-based auth).
  • Experience working with HSS, AAA, or IMS systems in real-world telecom environments.
  • Familiarity with GSMA standards (especially TS.43) is a strong plus.
  • Good system design and documentation skills.
  • Solid knowledge of backend systems, preferably with experience in Java-based environments.
  • Clear communicator who can work across technical and business teams.

Bonus Points For

  • Experience with 5G Core or GSMA Open Gateway APIs.
  • Prior work on entitlement platforms, provisioning systems, or SIM authentication flows.
  • Understanding of container-based deployments (e.g., Docker, Kubernetes).

Why Join Us

You'll lead a first-of-its-kind project that modernizes telecom authentication using the SIM. You'll be shaping the future of secure, seamless user experiences for mobile services without passwords or OTPs.

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