Mobile Core Network & Network Integration Engineer

Publication date : Apr 16, 2026, 12:00AM

Orange Business is here!
About us

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.

About the role

The Mobile Core Network & Network Integration Engineer will be responsible for supporting the client from initial technical discussions, coordinating technical activities with various teams (Core Network, IP, Telco Cloud, Firewall, IT, etc.), defining architecture designs, participating in Proof of Concept (PoC) implementation, deploying in production, and providing the required KPIs to ensure network performance and stability.

Key Responsibilities:

• Engage in initial technical discussions with the client to understand their needs and define the integration strategy.
• Coordinate technical activities across internal and external teams (Core Network, IP, Telco Cloud, Firewall, IT).
• Develop and validate architecture documents: High-Level Design (HLD) and Low-Level Design (LLD).
• Coordinate the initial testing phases to ensure proper validation.
• Oversee troubleshooting activities during service launch to address and resolve issues.
• Ensure the provision of necessary Network Management System (NMS) tools for monitoring and management.
• Coordinate activities to implement required improvements across various components of the end-to-end (E2E) chain.
• Contribute to the setup and monitoring of technical PoCs.
• Oversee deployment in the production environment.
• Collect, analyze, and present KPIs to monitor network performance.
• Troubleshoot technical issues and optimize network operations.

Required Skills:

• Extensive experience in mobile network engineering, especially in the core network (LTE, 5G).
• Deep understanding of network architecture, protocols, and interfaces (S1, S6, Gx, Gy, etc.).
• Proven experience in writing HLD and LLD documents.
• Ability to coordinate multiple technical teams.
• Good understanding of cloud environments (Telco Cloud) and virtualization.
• Experience in coordinating testing and troubleshooting activities.
• Knowledge of NMS tools and network performance monitoring.
• Strong knowledge of IP networks, routing, and IP-based architectures.
• Understanding of network security principles, firewalls, and security best practices.
• Familiarity with Quality of Service (QoS) mechanisms and traffic management.
• Strong project management and technical communication skills.
• Knowledge of KPIs related to mobile networks.

Candidate Profile:

• Engineering degree or equivalent in telecommunications, computer science, or related fields.
• Significant experience in a similar role.
• Autonomous, rigorous, with strong interpersonal skills.

About you

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, 5GCNaaS), 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.

TheMobile Core NetworkTeam oversees the architecture, engineering, deployment, and operation of the mobile core network.

You bring a can-do attitude, tackle challenges head-on and challenge the status quo with new and innovative ideas.

What we offer

• 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.

Only your skills matterRegardless 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.

At Orange, only your skills matter.

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