Mobile Networks Telecom Infrastructure Engineer (M/F)

A member of the NTT group - a global leader in telecoms and technological services - Transatel is the leading facilitator/aggregator of mobile virtual network operators (MVNO) in Europe. Pioneers of machine-to-machine communication, we also offer innovative 3G/4G/5G connectivity solutions dedicated to the Internet of Things (IoT) and enterprise applications. Our SIM cards equip more than 2M connected objects (PCs, tablets, routers, vehicles, planes, etc.) in 170 countries. Transatel currently brings together 250 IT and telecoms experts from 40 different nationalities based at the headquarters in Paris - La Défense.

Your mission Within the Telecom department, you will be a Referent and Expert on Transatel's Mobile Data core network. In close collaboration with the architect hub and within a team of Expert Engineers, you will be responsible for developing and documenting engineering solutions related to data routing on our network. This applies to both new services and the consolidation of existing infrastructures, in accordance with the company's strategy. You will also work with Project Managers, Operations teams, and other Engineers within the Telecom department. In this framework:

• You must first master Data Core architectures (MME/SGSN/SGW, GGSN/PGW, PCC, PCRF, OCS, etc.) of mobile networks and IPv4 / IPv6 technologies and understand their implementation within our virtual operator core network,
• You must design technical solutions that meet project needs while maintaining platform operability
• You must document each subject and ensure knowledge transfer to the operations and support teams
• You may be required to collaborate on platform support

Your profile A graduate of a Software or Telecom Engineering school or equivalent, you have at least 5 to 8 years of experience in telecommunications, particularly on GGSN / PGW. You are familiar with the following technologies:

• Practical knowledge of IP routing and associated protocols (BGP, OSPF and others)
• Mastery of GPRS/3G/LTE architectures and concepts
• Knowledge of protocols: GTP, Radius, Diameter and Gx, Gy, Gi, AAA, interfaces.
• Ability to meet short deadlines and variable priorities
• Ability to travel on-site if required
• Practical knowledge of the following mobile core network elements:
• PGW/GGSN
• SGW
• Radius Server
• DRA/DEA
• SGSN/MME
• Experience in IPv6, CGNAT and/or firewall technologies
• Experience with cloud deployments (Kubernetes, OCP, etc.)

Your natural curiosity will allow you to stay attentive to industry evolutions and you have a taste for innovation You are passionate about telecom service engineering, curious and proactive, and you enjoy developing innovative solutions. You are able to communicate with the various stakeholders of the company, both orally and in writing. You are organized and rigorous but also comfortable in a very dynamic environment. Fluency in English is indispensable for this position.