Senior Mobile Core Engineer

About the role

The Mobile Core Network Engineer will design and implement innovative core network solutions, enhancing telecommunications infrastructure and supporting Orange Business’s vision of seamless connectivity and advanced reliability.

Key responsibilities

• Design and develop technical solutions for client projects, including High-Level and Low-Level Designs.
• Define implementation road‑maps for 4G and 5G core network solutions aligned with client needs.
• Deploy mobile core network solutions in lab, pre‑production and production environments, ensuring horizontal and vertical integration.
• Work within a CI/CD environment, define test scenarios, execute tests and analyse end‑to‑end traces for 5G, VoLTE and IoT applications.
• Provide ongoing support for deployed solutions and manage related operational responsibilities.

Required profile

• Graduate degree in Software Engineering, Telecommunications Engineering or a related field.
• 5 to 8 years of proven experience in telecommunications focused on mobile core networks.
• Ability to work in 24/7 shift rotations.
• Strong communication skills in English (spoken and written).

Required skills

• In‑depth knowledge of mobile networks, protocols, architectures and interworking capabilities.
• Mastery of LTE/5G architectures and 3GPP standards.
• Practical experience with core network elements such as AMF/MME, SMF/SPGW‑C, UPF/SPGW‑U.
• Experience with CI/CD integration and testing automation tools (e.g., GitLab).
• Familiarity with containerised deployments in Telco‑cloud environments (Red Hat OpenShift).
• Knowledge of OSS/BSS tools, IPv4/IPv6, IP routing, QoS, MPLS and VPN technologies.
• Understanding of security measures for mobile core networks.

What we offer

• Global opportunities to work with multinational teams and customers.
• Flexible hybrid working model (office and remote).
• Professional development through training, up‑skilling and internal mobility.
• Health, well‑being, diversity & inclusion programs and CSR initiatives.
• Employee referral and recognition awards.