Senior Core Network Engineer

· Solid experience running a Configuration Management tooling stack for mobile Core — Cisco NSO, HPE Service Director, Ericsson ENM or an equivalent home-grown platform: golden configurations, drift detection, templating.

· A real track record managing configuration change on live Core: change windows, governance, rollback strategy, post-change KPI validation, and the discipline that 24x7 environments demand.

· Working fluency with NETCONF and YANG — you've personally run get-config and edit-config against live nodes and know how to read a schema deviation.

· Hands-on experience with at least one 5G SA Core (Ericsson, Nokia or Huawei), plus solid conceptual grounding across 5G SBA and 4G EPC architecture.

· A track record leading a delivery squad through a customer-facing service delivery, integration or first-of-kind deployment.

· GitOps operations and the YANG toolchain (libyang, pyang, yangdiff or similar).

· Reading-level Python and Kubernetes literacy — enough to review pull requests and pair with engineers on tricky paths.

· Multi-element orchestration experience (Cisco NSO or HPE Service Director).

· 3GPP interface familiarity, prior tenure at a Tier-1 European operator, VoLTE/IMS exposure, or contribution to IETF/3GPP/ETSI standards work.

· Fluent English; working Spanish is a strong plus, as customer sessions run in both languages.

None of this is mandatory on day one; a strong Core lead will pick it up quickly working alongside our platform team.

We're looking for a Senior Core Network Engineer with strong Configuration Management expertise to take on a technical leadership role in one of the most ambitious Core Network programmes in Europe, working directly with one of the continent's leading telecommunications operators.

This is a hands-on leadership position within a small, high-impact team. You'll set the technical direction, defend your decisions in front of demanding stakeholders, and lead a squad that counts on you to have their back. If you enjoy environments where your judgement carries weight and your decisions actually ship, this role is built for you.

· Own the technical design of Configuration Management capabilities within a complex, multi-vendor Core Network environment, ensuring scalability and resilience.

· Lead a delivery squad: you set direction and review design, while your team handles day-to-day platform coding.

· Make and defend technical decisions in front of the customer's Core Engineering team.

· Drive the translation of 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.

· Be the technical escalation point for the account, from vendor engagement to lab access and integration with the customer's change-management systems.