Senior Roaming Operations Engineer

Tieto

. Provide second-line support for Instant Roaming, Open-Connectivity Roaming, SMS Translator, Steering of Roaming, Managed PGW, and related services .

Posted 9/30/2026full-timeRemote • Lviv • GermanySeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in telecommunications with a strong focus on network architecture, signaling protocols, and roaming services. Proficient in managing incidents, supporting international customers, and collaborating with cross-functional teams to ensure service quality and operational efficiency.

Highest-signal resume keywords

Network ArchitectureSS7/SIGTRANLTEGSM Call FlowsRoaming Scenarios

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

TelecommunicationsSignaling ProtocolsRoaming ServicesIncident ManagementNetwork Monitoring

Soft Skills

Team CollaborationPressure ManagementIndependent Work

Tools & Technologies

Cellusys Steering of RoamingLinuxDockerSplunkPython

Industry Keywords

ITU StandardsETSI Standards5G NetworksVoLTEMobile Packet Core

Tech Stack

Tools & technologies

DockerLinuxPythonSplunk

About the role

Key responsibilities & impact

Provide second-line support for Instant Roaming, Open-Connectivity Roaming, SMS Translator, Steering of Roaming, Managed PGW, and related services
Monitor network and service availability and quality
Perform proactive and reactive maintenance activities
Manage incidents and execute planned maintenance work
Participate in new service implementations and network rollout projects with engineering teams
Collaborate with Product Management, Presales, and second-line customer support teams to gather logs and traces, validate routing and data transfer, and maintain service quality
Work with vendors, monitor performance, and ensure proper service delivery
Support customers worldwide with roaming-related issues and cooperate with mobile operators and Travel SIM companies
Apply knowledge of network architecture, signaling protocols, and interfaces
Assist with training new and existing team members
Support workload planning for business continuity during holiday periods
Participate in an on-call rotation of one week per month

Requirements

What you’ll need

Bachelor’s or Master’s degree in Electronics, Telecommunications, IT, ICT, or a related field
Minimum of 3–5 years of experience in telecommunications, primarily in signaling or roaming
Strong understanding of network architecture, SS7/SIGTRAN, LTE, GSM call flows, Mobile Packet Core call flows, and roaming scenarios
Familiarity with telecommunications technologies and ITU/ETSI standards
Upper-intermediate (B2) English proficiency or higher
Willingness and ability to travel internationally as required
Experience with the Cellusys Steering of Roaming platform is an advantage
Experience with 5G networks and/or VoLTE/IMS is an advantage
Good operational knowledge of Linux is an advantage
Knowledge of Docker is an advantage
Knowledge of Splunk and Python is an advantage
Ability to work effectively in an international and multicultural environment
Ability to work independently and as part of a team
Ability to work effectively under pressure and manage multiple projects
Background checks required for all final candidates

Benefits

Comp & perks

Professional growth
Meaningful projects
Open culture
Outstanding work-life balance
Flexible hybrid work model
Learning and development culture focused on continuous curiosity, unlearning, and relearning
International travel opportunities as required