Packet Core Test Engineer

The Packet Core Test Engineer is responsible for assuring the quality, stability, and readiness of the containerized Packet Core for deployment into live service. The role involves testing, validating, and integrating new software releases and design changes, identifying and mitigating risks, and working closely with stakeholders and vendors to enable a smooth, reliable delivery into operations. It plays a key role in safeguarding service integrity, optimizing test practices, and ensuring that the packet core evolves to meet future network and customer requirements.

• Packet Core & Protocol Expertise - Deep knowledge of 2G-5G core networks, signalling protocols, and cloud-native/containerized environments.
• Hands-on Testing & Problem-Solving - Practical experience in test execution, issue investigation, and validation using tools like Wireshark with strong analytical skills.
• Effective Communication & Stakeholder Management - Ability to clearly report test outcomes, collaborate with cross-functional teams, and manage vendor delivery
• Core / Platforms: Packet Core (2G/3G/4G/5G), Cloud-native, Containerization, Docker, Kubernetes, ETSI MANO, CNI
• Protocols: GTPv1/v2, NGAP, PFCP, Diameter, HTTP/2, REST, OpenAPI, TCP, UDP, SCTP, GRE, IPv4/IPv6
• Supporting Networking: DNS, DHCP, BGP, SNMP, NTP
• Security: IPsec, TLS, Encryption, Authentication
• Packet Core Nodes: MME, SGW, PGW, AMF, SMF, UPF, EPDG, SGSN
• Testing & Tools: Wireshark, Infovista Ativa, Packet capture tools, Diagnostics tools
• Monitoring / Observability: Prometheus, Grafana, Logging, Tracing

If you’re excited about this role but don’t meet every requirement, we still encourage you to apply, your unique experience could be just what we need.

Make it real - what does it mean for you?

• Exposure to top global companies working withCapgemini (145 of the Fortune 500 companies)
• Open access to digital learning platforms
• Active employee networks promoting diversity, equity and inclusion like OutFront, CapAbility or Women@Capgemini

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government’s Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

• Declare they have a disability, and
• Meet the minimum essential criteria for the role.
• Please opt in during the application process.

Capgemini. Make it real.

Need to know

• All roles will require a level of security clearance; BPSS OR Security Clearance OR Developed Vetting.
• Location: This role requires 3 days’ presence at the Slough office.
• You can bring your whole self to work. At Capgemini building an inclusive futureis part of everyday life and will be part of your working reality. We have built arepresentative and welcoming environment, for everyone.

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.