Packet Core Engineer

Transatel | NTT

Expert in packet core network engineering for mobile data at Transatel. Responsible for designing and documenting solutions while collaborating with project teams and operational engineers.

Posted 6/13/2026full-timeCourbevoie • 🇫🇷 FranceMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

CloudDNSKubernetes

About the role

Key responsibilities & impact

Within the Telecoms department, you will be the reference expert for Transatel’s mobile data core network.
In close collaboration with the architects and as part of a team of expert engineers, you will be responsible for designing and documenting engineering solutions for data routing on our network.
You will also work with project managers, operations teams and other engineers in the Telecoms department.
You must have a strong command of Data core network architectures (MME/AMF, SGW/SMF, PGW/UPF, PCC, PCRF, OCS, RADIUS, DNS, etc.) for mobile networks, as well as IPv4/IPv6 technologies, and understand their implementation within our virtual operator core network.
You will design and validate technical solutions that meet project requirements while ensuring the platform’s operability.
You will document each topic and ensure knowledge transfer to the operations and support teams.

Requirements

What you’ll need

Degree in telecommunications or computer engineering
3 to 8 years of experience in telecommunications, notably with GGSN/PGW equipment
Practical knowledge of IP routing and related protocols (BGP, OSPF, etc.)
Strong understanding of GPRS/3G/4G/5G architectures and concepts
Knowledge of protocols: GTP, Diameter, HTTP/2 and interfaces Gx, Gy, Gi, AAA (RADIUS), IMS, etc.
Ability to meet tight deadlines and adapt to changing priorities
Availability for on-site travel if required
Experience with IPv6, CGNAT and/or firewall technologies
Experience with cloud deployments (Kubernetes, OCP, etc.)
Ability to plan for industrialization of customer configurations (automation)
Fluency in English is required for this position.

Benefits

Comp & perks

Compensation package: base salary + individual bonus + semi-annual profit-sharing and company participation (can be invested in PEE or PER)
Salary review committees every 6 months
Up to 2 days of telework per week
25 days of annual leave + additional granted days off
Works council (CSE), on-site company restaurant, attractive health insurance, 50% reimbursement of Navigo public transport pass or sustainable mobility allowance

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Hard Skills & Tools

Data core network architecturesMMEAMFSGWSMFPGWUPFPCCPCRFOCS

Soft Skills

ability to meet tight deadlinesadaptability to changing prioritiesknowledge transfer

Certifications

degree in telecommunicationsdegree in computer engineering