Senior Core Network Engineer - Configuration Management

About the role

A Senior Core Network Engineer with strong Configuration Management expertise is sought for a technical leadership role in one of Europe's most ambitious Core Network programmes, working directly with a leading telecommunications operator. It is a hands-on leadership position in a small, high-impact team where you set the technical direction, defend your decisions before demanding stakeholders and lead a squad.

Key responsibilities

• Own the technical design of Configuration Management capabilities in a complex, multi-vendor Core Network environment, ensuring scalability and resilience.
• Lead a delivery squad: set direction and review designs while the team handles day-to-day platform coding.
• Make and defend technical decisions in front of the customer's Core Engineering team.
• Turn operator change practices (change windows, CMDB updates, rollback expectations) into automated, auditable gates.
• Own vendor and data-model engagement across Ericsson, Huawei and other in-scope vendors, including YANG modules and NETCONF exports.
• Act as the technical escalation point for the account, from vendor engagement to lab access and integration with the customer's change-management systems.

Required profile

• Solid experience running a Configuration Management tooling stack for mobile Core (Cisco NSO, HPE Service Director, Ericsson ENM or an equivalent home-grown platform).
• Proven track record managing configuration change on live Core, including change windows, governance, rollback strategy and post-change KPI validation.
• Fluent English; working Spanish is a strong plus, as customer sessions run in both languages.
• Experience leading a delivery squad through a customer-facing service delivery, integration or first-of-kind deployment.

Required skills

• NETCONF and YANG, with hands-on get-config and edit-config experience.
• At least one 5G SA Core (Ericsson, Nokia or Huawei), plus conceptual knowledge of 5G SBA and 4G EPC.
• Nice to have: GitOps and the YANG toolchain, Python and Kubernetes literacy, multi-element orchestration experience, 3GPP interface familiarity, prior tenure at a Tier-1 European operator, VoLTE/IMS exposure or standards work.

What we offer

• Competitive salary, health insurance and a Flexible Compensation Plan.
• Annual training budget.
• Flexible working model, from remote to hybrid or office-based, with reduced working days on Fridays and in July and August.
• Projects in national and international environments.