5G Core System Engineering Lead

Own end-to-end 5G Core system architecture across the full service chain — AMF, SMF, UPF, UDM, PCF, AUSF, CHF, NEF — and produce architecture decision records (ADRs), system decomposition documents, and interface specifications that serve as the engineering source of truth.

Define and own interface specifications at every core domain boundary: interfaces between network functions, Nx reference points, UPF-to-data-network anchoring, and integrations with back-end platforms including charging, billing, and SIM provisioning.

Drive system-level trade-off analyses across competing constraints, latency-aware timer and retransmission parameter tuning, and complexity vs. flexibility trade-offs in policy and charging architecture.

Analyse how satellite-imposed constraints propagate into core design decisions.

Lead call-flow design for key 5G Core procedures in the satellite context.

Define requirements and interface contracts for back-end platform integration: CDR generation and CHF interface, SIM provisioning and UDM data model, BSS/OSS integration points.

Evaluate build-vs-buy options for core network functions and platform components; produce structured trade studies with quantified criteria covering performance, standards conformance, operational complexity, and cost.

Define system-level acceptance criteria and performance benchmarks — session setup latency, registration success rate, charging accuracy, failover recovery time — and coordinate with the integration lab team to ensure test coverage matches architecture scope.

Maintain alignment with 3GPP Rel-17/18 core specifications (SA2, SA5, CT4); identify where standard assumptions diverge from satellite operational constraints and drive resolution.