Senior Core Network Engineer

This is a fully remote position, open to applicants in Spain.

📋 Description

• Take charge of the technical design for Configuration Management features within a complex, multi-vendor Core Network setting, ensuring both scalability and resilience.

• Lead a delivery team by establishing direction and reviewing designs while the team manages daily platform coding tasks.

• Make and justify technical decisions in front of the customer's Core Engineering team.

• Convert operator change practices, including change windows, CMDB updates, and rollback expectations, into automated and auditable gates.

• Manage vendor and data-model interactions across Ericsson, Huawei, and other relevant vendors, including YANG modules and NETCONF exports.

• Act as the technical escalation point for the account, overseeing vendor interactions, lab access, and integration with the customer's change management systems.

⛳️ Requirements

• 5+ years of relevant work experience.

• Strong experience in operating a Configuration Management tooling stack for mobile Core, such as Cisco NSO, HPE Service Director, Ericsson ENM, or equivalent platforms.

• Experience with golden configurations, drift detection, and templating.

• Proven record in managing configuration changes in live Core environments, covering change windows, governance, rollback strategies, post-change KPI validation, and 24x7 operational discipline.

• Proficient understanding of NETCONF and YANG, including practical use of get-config and edit-config against live nodes and the ability to interpret schema deviations.

• Practical experience with at least one 5G SA Core from Ericsson, Nokia, or Huawei.

• Conceptual understanding of 5G SBA and 4G EPC architecture.

• Proven experience leading a delivery squad through customer-facing service delivery, integration, or first-of-a-kind deployments.

• Fluent in English.

• Working proficiency in Spanish is a valuable asset.

• Additional skills that are not mandatory from day one include: GitOps operations; YANG toolchain experience such as libyang, pyang, or yangdiff; reading-level Python; Kubernetes knowledge; multi-element orchestration; familiarity with 3GPP interfaces; experience with Tier-1 European operators; exposure to VoLTE/IMS; or contributions to IETF/3GPP/ETSI standards.

🏝️ Benefits

• Competitive salary, health insurance, and a Flexible Compensation Plan as part of the enterprise benefits.

• Annual training budget to keep you technologically current and promote professional growth.

• Flexible working hours allowing for adaptability in entry and exit times.

• Shortened workday on Fridays and throughout July and August.

• Opportunities to work on projects in both national and international contexts, facilitating global growth.

• A flexible working model with options ranging from remote to hybrid or office-based settings.

• A positive work environment with skilled professionals within the company.