Mobile Core Network Engineer

Publication date : Nov 04, 2025, 12:00AM

Join us at Orange Business!
We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.
Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.

The main mission of the Mobile Core Network Engineer is to ensure the design and implementation of innovative core network solutions that enhance the overall telecommunications infrastructure, driving the organization forward towards its vision of seamless connectivity and advanced network reliability.

• Design and develop technical solutions tailored to client projects, including High-Level Design (HLD) and Low-Level Design (LLD).
• Define the implementation roadmap for 4G and 5G core network solutions aligned with client needs.
• Contribute to the successful deployment of mobile core network solutions in lab, pre-production, and production environments, ensuring horizontal and vertical integration.
• Work within a Continuous Integration/Continuous Deployment (CI-CD) environment.
• Define test scenarios, execute tests, and analyze collected traces in end-to-end (E2E) environments, including 5G, VoLTE, and IoT applications.
• Provide ongoing support for deployed solutions in production and address any related responsibilities.

• In-depth knowledge of mobile networks, encompassing protocols, architectures, and interworking capabilities.
• Mastery of LTE/5G architectures and engineering concepts. Knowledge of 3GPP standards related to mobile core networks.
• Practical experience with key mobile core network elements, including AMF/MME, SMF/SPGW-C, UPF/SPGW-U, and others.
• Proven experience in deploying mobile core network solutions in operational environment.
• Experience in support activities for operational networks.
• Familiarity with functional, performance, and E2E testing tools.
• Proficient with CI-CD integration and testing automation tools, such as GitLab.
• Experience with containerized mobile core network deployments in Telco cloud environments, such as Redhat OpenShift.
• Knowledge of OSS and BSS tools
• Understanding of 4G/5G RAN radio networks.
• Practical knowledge of IPv4 and IPv6 architectures, including IP routing, QoS, MPLS, and VPN technologies.
• Awareness of security measures and technologies pertinent to mobile core networks.
• Ability to coordinate and manage technical activities.
• Ability to manage supplier relationships.
• Ability to prioritize tasks and meet tight deadlines.
• Demonstrated rigor, curiosity, and attention to detail in technical tasks.
• Effective communication skills to translate client needs into technical requirements.
• Active participation in collaborative solution design.
• Strong interpersonal skills and a collaborative spirit.
• A solid understanding of the importance of delivering high-quality products within established costs and timelines.
• A commitment to continuous learning and staying up-to-date with technological advancements.
• Proficient in English, both spoken and written.

Within OINIS/ Services, the “Mobile Services” department is responsible for the architecture, engineering, the construction, deployment and operation of all international mobile services (roaming, messaging, 5G CNaaS), which are one of the growth drivers for international wholesale. The department's ambition is to drive the software transformation of mobile services as part of the move to 5G.

The Mobile Core NetworkTeam is in charge of the architecture, engineering, deployment and operation of the mobile core network. The team is providing support to multiple projects delivered to OB (IoT-A, IoT-N, …) and OW/OWI (M(V)NO CNaaS, OLB, …). It contributes also to answer to different RFPs (IRIS2, …).

You bring rigor, passion for challenges, and determination. You seek the opportunity to expand your expertise, achieve your goals, and thrive.

• Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.
• Flexible Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).
• Professional Development: training programs and upskilling/re-skilling opportunities.
• Career Growth: Internal growth and mobility opportunities within Orange.
• Caring and Daring Culture: Health and well-being programs and benefits, diversity & inclusion initiatives, CSR and employee connect events.
• Reward Programs: Employee Referral Program, Change Maker Awards.

Regardless of your age, gender identity, race, ethnic origin, religion/belief, sexual orientation, marital status, neurotype, disability, veteran status or appearance, we encourage diversity within our teams because it is a strength for the collective and a vector of innovation. Orange Group is a disabled-friendly company and equal opportunity employer: don't hesitate to tell us about your specific needs.

Only your skills matter

Regardless of your age, gender, origin, religion, sexual orientation, neurodiversity, disability, or appearance, we actively encourage diversity within our teams, as it is both a collective strength and a driver of innovation. Orange is a disability-friendly company: please feel free to let us know about any specific needs you may have.