Summary: As a CORE Data Senior Engineer, you will support the migration of legacy EPC infrastructure to a cloud-based architecture, working with Packet Core network components and virtualized environments. Highlights: 1. Join a multicultural and inclusive team environment 2. Enjoy a supportive atmosphere promoting work-life balance 3. Your career growth is central to our mission Évora, Fundão, Lisboa \- Colombo, Lisboa \- Expo, VNG \- Cais de Gaia, VNG \- Lake Towers CORE Data Senior Engineer At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s most innovative companies unleash their potential. From autonomous cars to life\-saving robots, our digital and software technology experts think outside the box as they provide unique R\&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same. Your Role As a **CORE Data Senior Engineer**, you will support the migration of legacy EPC infrastructure to a cloud\-based architecture, working with Packet Core network components and virtualized environments. You will be responsible for the deployment, integration, testing, and troubleshooting of network nodes while ensuring service quality and adherence to standards. Key responsibilities include: * Hands\-on deployment, integration, and configuration of **Packet Core network components** (e.g., SGSN, GGSN, MME, PGW). * Analyze and document **call flows across various nodes and interfaces** in the packet core network. * Troubleshoot packet core issues to ensure **seamless service delivery** and customer satisfaction. * Execute **comprehensive acceptance test plans** for new network elements and services. * Check and validate **TSD** and **HLD** documents, highlighting any gaps or risks in the solution to Presales and stakeholders. * Prepare **CIQs, LLDs, data fill/backfill sheets**, and validate project MOPs. * Support **migration and go\-live strategies** in coordination with TPM and customers. * Maintain and update **design changes** during the project lifecycle. * Conduct **bug scrubbing** before node go\-live. * Create **functional and non\-functional ATP Test Object Lists (TOL)** in consultation with the customer. * Provide **troubleshooting support and trace analysis** for the SE team. * Capture lessons learned and participate in **knowledge transfer (KT) sessions**. * Work with **virtualized environments**, including Kubernetes, OpenStack, Linux, KVM, VMware, and VNF configuration/management (scale in/out, healing). Your Profile* Bachelor’s degree in **Telecommunications** or equivalent. * Minimum 3 years of relevant work experience in **IP domain** and/or **Packet Core networks**. * Strong hands\-on experience with **Packet Core nodes** (SGSN, GGSN, MME, PGW) and mobile network standards (2G–5G, LTE, VoLTE). * Familiarity with **Nokia Packet Core Products** (CMM / CMG / NRD) and certifications preferred. * Solid knowledge of **IP/MPLS protocols** including OSPF, ISIS, BGP, LDP, RSVP, and related mobile interfaces. * Experience with **cloud and virtualization technologies**: Kubernetes, OpenStack, Linux, KVM, VMware, VNFs. * Strong analytical and problem\-solving skills; able to troubleshoot complex core network issues. * Good communication skills and ability to work proactively in **multicultural, cross\-functional teams**. What you´ll love about working here* Join a multicultural and inclusive team environment. * Enjoy a supportive atmosphere promoting work\-life balance. * Hybrid work. * Your career growth is central to our mission. Our array of career growth programs and diverse professionals are crafted to support you in exploring a world of opportunities. * Access valuable training and certifications in cutting\-edge technologies. * Engage in exciting national and international projects. * Health and life insurance. * Referral program with bonuses for talent recommendations. * Great office locations. **About Capgemini** Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world. Ref. code 399401\-en\_GB Posted on 22 Jan 2026 Experience level Experienced Professionals Contract type Temporary Location Évora, Fundão, Lisboa \- Colombo, Lisboa \- Expo, VNG \- Cais de Gaia, VNG \- Lake Towers Business unit Engineering and RandD Services Brand Capgemini Engineering Professional communities Products \& Systems Engineering