Lead 5G Core Systems Architect for Satellite Networks

E-Space; Arlington (TX); On-site; USD 180,000 - 220,000; Full time

Benefits offered by this job

Paid holidays

Paid time off

Health and wellness care options

Job summary

E-Space in Arlington, TX is seeking a 5G Core System Engineering Lead to own end-to-end architecture and interface definitions for satellite 5G Core networks. You will decompose requirements, define interfaces, and drive trade‑offs across software, platform, and back‑end teams to support global roaming and secure, scalable IoT services.

The role demands deep 3GPP SA Core expertise, strong documentation skills, and the ability to translate satellite constraints into concrete architectural

Qualifications

• 12+ years in system or network engineering, with deep focus on 5G SA Core or LTE EPC architecture.
• Strong command of 3GPP 5G Core architecture: NAS protocols, SBI service interfaces, N‑reference points, and session, policy, and charging management across AMF, SMF, UPF, UDM, PCF, AUSF, and CHF.
• Demonstrated experience authoring interface specifications, system requirement documents, and trade study reports in a multi‑team engineering environment.
• Understanding of how network‑layer constraints propagate into core protocol behaviour and how to address them through parameter tuning or architectural adaptation.
• Experience with charging and policy architecture.

Responsibilities

• Own end-to-end 5G Core system architecture across the full service chain - AMF, SMF, UPF, UDM, PCF, AUSF, CHF, NEF - and produce ADRs and interface specs.
• Define and own interface specifications at core domain boundaries and between network functions and back-end platforms.
• Drive system-level trade‑offs, latency tuning, and policy/charging architecture decisions.
• Analyse satellite‑imposed constraints and their impact on core design choices.
• Lead call‑flow design for key 5G Core procedures in satellite contexts.
• Define requirements and interface contracts for back‑end platform integration (CDR, CHF, SIM provisioning, UDM data model).
• Evaluate build‑vs‑buy options for core network functions and components; produce trade studies with quantified criteria.
• Define system‑level acceptance criteria and performance benchmarks; coordinate with test labs.
• Maintain alignment with 3GPP Rel‑17/18 core specs, identifying deviations with satellite constraints.

Skills

5G Core architecture

Interface specifications

System design

Trade-off analysis

Satellite/NTN knowledge

Cross-functional leadership

Education

Bachelor's or Master's in EE/CS

Tools

ADRs

Job description

E-Space in Arlington, TX is seeking a 5G Core System Engineering Lead to own end-to-end architecture and interface definitions for satellite 5G Core networks. You will decompose requirements, define interfaces, and drive trade‑offs across software, platform, and back‑end teams to support global roaming and secure, scalable IoT services.

The role demands deep 3GPP SA Core expertise, strong documentation skills, and the ability to translate satellite constraints into concrete architectural