SIM Management, 5G Core Engineer

Ready to make connectivity from space universally accessible,secureand actionable? Thenyou’vecome to the right place!

E-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. We are building ahighly-advanced low Earth orbit (LEO) space system that will fundamentally change the design, economics,manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems.

We’reintentional,we’reunapologeticallycuriousandwe’re 100% committed toinnovatespace-based communications anddeliveractionable intelligence that will expand global economies, protect space and ourplanetand enhance our overall quality of life.

TheSIM Management5GCore Engineer will analyze, design, implement, and verify the configuration and integration of subscriber data managementnodes(UDR / UDM), networks, and systems across our5G infrastructure. Your scope of work includes introduction, upgrade, expansion, functionality, and capacity scenariosonmodern cloud-native UDM and UDR deployments. You will be a key contributor to the convergence of subscriber databases asplatformevolves — and your work will directly shape the reliability and scalability of the networks our partners depend on.

As part of the5G Core team, you will own the subscriber data management platform across our network generations. Your responsibilities include:

• Manage and operate UDR, and UDM nodes across 5G coredomain, ensuring high availability and data integrity for subscriber profiles.

• Design andmaintainsubscriber provisioning workflows, including IMSI/MSISDN management, service profiles, and roaming configurations.

• Implement and verify HTTP/2-based (N8,Nudm) interfaces connecting subscriber data nodes to AMFand other core elements.

• Use and build dashboards tomonitorsubscriber node KPIs, quickly surface abnormal conditions, andidentifypatterns before they become outages.

• Own incident management for the subscriber data domain: follow communications procedures for internal escalation and external vendor coordination, ensuring SLAs are met.

• Perform maintenance, security audits, patching, and emergencyresponsefor UDM/UDR platforms.

• Undertake fault handling and corrective actions at node, service, and infrastructure level, including protocol trace analysis (Wireshark/tcpdump) onHTTP/2 signaling.

• Lead and contribute to project activities: E2E introduction of new subscriber management nodes, capacity expansions, software upgrades, and feature activations.

• Support onboarding by configuring subscriber data repositories, IMSI ranges, and roaming agreements in UDM/UDR systems.

• Collaborate with teams to resolve cross-domain subscriber authentication and registration issues.

At least 10 years of experience in core network engineering with a focus on subscriber data management in5G Corenetworks.

Technical — Subscriber Data Management

• Deep operational knowledge ofHSS/HLRor UDR/UDMplatforms.

• Hands-on experience with configuration and troubleshooting.

• Practical experience with 5G UDM and UDR, including cloud-native deployments (containerized/Kubernetes-based NFs) and HTTP/2 SBI interfaces (N8,agement,).

• Solid understanding of subscriber profile structures: 5GS subscription.

• Experience with IMSI/MSISDN range management, number portability (NP/MNP) integration, and SIM/eSIMprovisioning workflows.

Technical — Network & Systems

• Working knowledge of5G SA (AMF/SMF/UDM/UDR/AUSF/UDSF) core architectures and their subscriber data flows.

• Familiarity with 3
  
  GPP standards governing subscriber data: TS 29.503/29.504 (UDM/UDR SBI), TS 23.502 (5G procedures).

• Comfortable with Linux/Unix-based systems — able to navigate shells, interpret logs, manage processes, and perform…