Software Integration Lead – 5G CORE

Espace; Saratoga (CA); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Health and wellness care options

Continuous learning and development

Paid time off

Job summary

Espace, located in Saratoga, CA, seeks a Software Integration Lead to own the integration of back-end subscriber systems with the 5G Core network. Responsibilities include defining integration architecture and leading a small engineering team for successful delivery.

The ideal candidate will have 12+ years of experience in software engineering focused on BSS/OSS integration and a strong understanding of 5G Core. The position offers a full-time role with various benefits, including competitive salaries and continuous learning opportunities.

Qualifications

• 12+ years of software engineering experience with focus on BSS/OSS integration.
• Strong understanding of 5G Core subscriber management and interface connections.
• Hands-on experience with SIM or eSIM provisioning infrastructure.

Responsibilities

• Own the integration architecture for back-end systems with the 5G Core.
• Lead integration of billing and charging stack with core charging interfaces.
• Build and maintain integration test harnesses for interfaces.

Skills

BSS/OSS integration with mobile core networks

API design and integration engineering

SIM/eSIM provisioning

Device management integration

Education

Bachelor's or Master's degree in Computer Science or related field

Tools

CRM integration

Billing platforms

Job description

E‑Space is building a low Earth orbit (LEO) space system to enable hyper‑scaled Internet of Things (IoT) solutions and services. We seek a Software Integration Lead to own integration of back‑end subscriber and business support systems with the 5G Core network.

Responsibilities

• Own the integration architecture and delivery for back‑end systems that interface directly with the 5G Core: SIM/eSIM provisioning, CRM, billing and online/offline charging, and device management.
• Define and implement the integration between SIM and eSIM provisioning infrastructure and core subscriber management – including subscriber profile delivery, remote SIM provisioning workflows, and profile lifecycle management across satellite and ground.
• Design and own the interface between CRM and the core network: subscriber record synchronisation, service entitlement and quota management, and real‑time event delivery for customer‑facing workflows.
• Lead integration of the billing and charging stack with the core charging interfaces – CDR generation and delivery, online charging authorization flows, and reconciliation between core charging events and BSS billing records.
• Integrate device management capabilities with core network functions, including device policy enforcement, configuration delivery, and status signalling across the satellite link.
• Define interface contracts (API specifications, data models, event schemas) at each BSS/OSS‑to‑core boundary; maintain them as the engineering source of truth shared across core software and back‑end platform teams.
• Build and maintain integration test harnesses for each BSS/OSS‑to‑core interface; drive automation and define acceptance criteria for every interface at each release milestone.
• Own defect triage and root‑cause analysis for integration failures at BSS/OSS‑to‑core boundaries; coordinate resolution across core software and back‑end platform engineering teams.
• Lead and mentor a small integration engineering team (2–4 engineers); set delivery cadence and engineering quality standards.

Qualifications

• Bachelor's or Master's degree in Computer Science, Software Engineering, Electrical/Computer Engineering, or a related field.
• 12+ years of software engineering experience, with significant focus on BSS/OSS integration with mobile core networks.
• Strong understanding of 5G Core subscriber management and the interfaces that connect BSS/OSS systems to the core – authentication, session management, policy, and charging.
• Hands‑on experience integrating SIM or eSIM provisioning infrastructure (SM‑DP+, SM‑SR, or equivalent) with mobile core subscriber management systems.
• Experience integrating CRM and billing platforms with telecom core networks: service provisioning APIs, online/offline charging interfaces, CDR delivery, and event‑driven subscriber data updates.
• Experience with device management integration in a mobile or IoT context: policy enforcement, remote configuration, and status reporting over cellular.
• Strong API design and integration engineering skills: REST and event‑driven interface specification, data model design, and integration test automation.
• Experience leading small software integration teams with clear API contract discipline and release tracking.

Preferred

• Experience with eSIM and remote SIM provisioning in a satellite or IoT connectivity context.
• Background in MVNO BSS/OSS integration: multi‑PLMN subscriber management, roaming data exchange, or MVNO billing stack integration.
• Familiarity with cloud‑native core deployment and how containerised network functions affect BSS/OSS integration patterns.
• Experience in a startup or fast‑paced R&D environment where integration scope expands rapidly.
• Prior work with government or defence connectivity platforms with BSS/OSS integration requirements.

Benefits

• An opportunity to really make a difference
• Sustainability at our core
• Fair and honest workplace
• Innovative thinking is encouraged
• Competitive salaries
• Continuous learning and development
• Health and wellness care options
• Financial solutions for the future
• Optional legal services (US only)
• Paid holidays
• Paid time off

This is a full‑time exempt position based out of our Saratoga, CA office.

We are not currently able to provide employment sponsorship for candidates who do not hold work authorization for the location of this role.