End-to-End Test and Integration Engineer – 4G/5G Mobile Core

Publication date : Oct 20, 2026, 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.

As part of our CNaaS (Core Network As A Service) program, we are looking for an End-to-End Test and Integration Engineer to support the integration, testing, and validation of 4G/5G Core network solutions. The role covers the end-to-end validation of network functions and services, as well as L2/L3 investigation and support.

The Core network platform includes cloud-native network functions deployed in a Kubernetes environment. You will work with engineering, operations, and component expert teams to ensure that the platform and its services meet functional, interoperability, performance, and stability requirements.

Main Responsibilities

• Set up and maintain the test environments required to validate 4G/5G Core platforms, including remote access to lab environments.
• Define and execute end-to-end integration and service validation tests for 4G/5G Core network functions.
• Validate key 4G/5G services and procedures, including registration, authentication, PDU session establishment, mobility, and roaming, as applicable.
• Perform integration testing following upgrades or configuration changes to 4G/5G Core components, in coordination with relevant technical teams.
• Investigate complex issues across the 5G Core, using functional and protocol testing, traces, logs, and performance indicators.
• Coordinate root-cause analysis and resolution with component, infrastructure, and operations teams.
• Support the automation of recurring test activities using scripting and DevOps tools.
• Contribute to the configuration and improvement of observability capabilities, including monitoring, logging, and alerting.
• Monitor the performance, availability, and stability of qualification, pre-production, and production environments.
• Maintain test plans, procedures, results, and technical documentation.
• This job position requires on-call and 24/7 support on rotational basis.

Required Skills

• Strong knowledge of 4G/5G SACore architecture, network functions, and end-to-end procedures.
• Experience with4G/5G SA Core integration, testing, or validation in a telecom environment.
• Good understanding of 3GPP specifications and interfaces.
• Experience troubleshooting control-plane and user-plane issues using traces and protocol analysis tools.
• Knowledge of Kubernetes, Docker, and cloud-native or virtualized environments.
• Experience with observability tools such as Prometheus, Grafana, and ELK or equivalent.
• Familiarity with DevOps practices, including CI/CD, deployment automation, and configuration management.
• Scripting skills for test automation, preferably in Python, Bash, or similar languages.
• Strong analytical and problem-solving skills.
• Knowledge of security principles and incident management.

Profile

• Engineering degree or equivalent in telecommunications, computer science, or a related field.
• Significant experience in testing and integrating mobile core network solutions, with a focus on 4G/5G Core.
• Practical experience working with containerized or virtualized telecom platforms.
• Ability to collaborate effectively with multidisciplinary technical teams.
• Strong communication skills and the ability to document technical processes and findings clearly.
• Professional proficiency in English.

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

• 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.

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.