Tech lead - Core Network

Job Description 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. What you'll do · 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. Requirements · 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. · Fluent English; working Spanish is a strong plus, as customer sessions run in both languages. Nice to have None of this is mandatory on day one; a strong Core lead will pick it up quickly working alongside our platform team. · 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. Benefits · Competitive salary, health insurance and Flexible Compensation Plan as an enterprise benefit · Annual training budget to help you stay technologically up to date and grow professionally · Time flexibility : our life is not just a working day; we give you flexibility both in entry and exit. In addition, we enjoy a reduced working day on Fridays and Summer (July and August) · Our projects are cutting-edge in technology and are in both national and international environments, making your growth global · We provide a flexible working model , adapted to the needs of each role and team, with options from remote to hybrid or office-based arrangements. · Our employee satisfaction survey tells us that we have a great work environment and great professionals in the company. Do you want to check it? Join us!