Espace
5G Core System Engineering Lead
Saratoga, CA · Full-time
Work authorization required$180k-$220kDetected 27 days ago
Node.jsElectrical Engineering5G/LTENetwork EngineeringCommunication
About the role
- Ready to make connectivity from space universally accessible, secure and actionable?
- E-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services.
- This is a full time, exempt position, based out of our Arlington, TX office.
Responsibilities
- 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.
- Evaluate build-vs-buy options for core network functions and platform components
- Maintain alignment with 3GPP Rel-17/18 core specifications (SA2, SA5, CT4)
- identify where standard assumptions diverge from satellite operational constraints and drive resolution.
- 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.
- Maintain alignment with 3GPP Rel-17/18 core specifications (SA2, SA5, CT4); identify where standard assumptions diverge from satellite operational constraints and drive resolution.
Requirements
- Bachelor's or Master's degree in Electrical Engineering, Computer Science, or a related field.
- 12+ years in system or network engineering, with deep focus on 5G SA Core or LTE EPC architecture.
- Experience with charging and policy architecture.
- Experience with 3GPP NTN core adaptations (Rel-17/18): satellite access node (SAN) architecture, timer and window parameter adaptation for high-latency links, or UPF placement in non-terrestrial topologies.
- Experience with NEF or network exposure APIs and B2B API gateway architecture.
Compensation
- Familiarity with 3GPP SA2/CT4 specifications or direct standards contribution experience.
- Experience with NEF or network exposure APIs and B2B API gateway architecture.
- Background in SIM provisioning platforms, subscription management, or UDM/HSS data modelling.
- Experience in a startup or fast-paced R&D environment where architectural decisions move at product speed.
Benefits
- Continuous learning and development
- Health and wellness care options
- Bonus points for the following:
Company info
- An opportunity to really make a difference
Visa & Work Authorization
- E-Space is not currently able to provide employment sponsorship for candidates who do not hold work authorization for the location of this role.
This listing is sourced directly from Espace's careers page and normalized into a canonical job model.