Core Network Customer Technical Project Manager - IMS/VoLTE

Capgemini Engineering; Lisboa; Hybrid; EUR 75,000 - 95,000; Full time

Benefits offered by this job

Health and life insurance

Hybrid work

Career growth programs

Training and certifications

International projects

Job summary

Capgemini Engineering is seeking an experienced telecom deployment specialist to lead ISBC/SBC deployments across multi-operator and roaming environments. You will coordinate with engineering teams, vendors, and customer stakeholders to ensure successful deployments and migrations.

You will review LLDs and MOPs, validate test plans, and supervise LAB and production activities with a focus on quality, governance and timely delivery. Hybrid work model and international projects are offered.

Qualifications

• Hands-on experience with IMS Core, VoLTE architecture, SIP signaling and telecom interconnect environments.
• Proven deployment/integration of ISBC/SBC in multi-vendor/multi-operator setups.
• Strong understanding of core network, roaming services and interconnect gateways.

Responsibilities

• Lead end-to-end deployment and integration of ISBC across multi-operator and roaming environments.
• Manage projects involving IMS, VoLTE Core, Diameter/RADIUS platforms and interconnect gateways.
• Create migration and implementation plans aligned with customer and business requirements.
• Coordinate with engineering teams, vendors, operations and customer stakeholders.

Skills

IMS Core

VoLTE

SIP signaling

Telecom interconnect

Diameter/RADIUS

Roaming

Signaling protocols

ISBC/SBC deployments

Core network

Documentation

Stakeholder management

Cross-functional leadership

Job description

Capgemini Engineering

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

• Lead end-to-end deployment and integration of Interconnect Session Border Controllers (ISBC) across multi-operator and roaming environments
• Manage projects involving IMS, VoLTE Core, Diameter/RADIUS platforms, and interconnect gateways
• Create detailed migration and implementation plans aligned with customer and business requirements
• Coordinate in-depth technical discussions with engineering teams, vendors, operations, and customer stakeholders
• Review and validate Low-Level Designs (LLD), Method of Procedures (MOPs), rollback plans, test cases, and operational documentation
• Ensure all deployment and migration scenarios are fully tested in LAB and Production environments
• Execute migration activities with structured reporting to stakeholders and senior management, including daily and critical hourly updates when required
• Drive project planning activities, milestone tracking, risk management, and deployment governance
• Coordinate with Design, Operations, and Delivery teams to ensure smooth rollout and operational readiness
• Support compliance, audit, and quality assurance processes for telecom deployments and operational activities

Your Profile

• Strong hands-on experience with IMS Core, VoLTE architecture, SIP signaling, and telecom interconnect environments
• Solid expertise in Diameter and RADIUS platforms, roaming integrations, and telecom signaling protocols
• Proven experience deploying and integrating ISBC/SBC solutions in multi-vendor and multi-operator environments
• Strong understanding of telecom core network architecture, roaming services, and interconnect gateways
• Experience managing LAB validations, production deployments, migration execution, and rollback activities
• Skilled in preparing and reviewing technical documentation including LLDs, MOPs, test plans, and operational procedures
• Strong stakeholder management and communication skills, with experience reporting to senior management and customer leadership
• Ability to lead cross-functional technical discussions and coordinate complex deployment activities under tight timelines
• Excellent project coordination, planning, and risk management capabilities
• Comfortable working in international environments and collaborating with remote engineering and operations 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

Capgemini is the business transformation partner for enterprises in the age of AI. We help organizations imagine and build an intelligent, sustainable future, combining AI, technology and human ingenuity to transform how they operate, innovate and grow. With unique end-to-end capabilities spanning strategy, technology, engineering and intelligent operations, we bring together deep industry expertise and market-leading capabilities in AI, cloud and data to turn ambition into measurable business outcomes at scale. Supported by a robust ecosystem of partners and nearly 60 years of expertise, Capgemini is a responsible and diverse global organization of over 410,000 team members in more than 50 countries.