Junior International Roaming & Noc Engineer (Hybrid)

Itrtech Group; Porto; Hybrid; EUR 17,000 - 20,000; Full time

Job summary

Itrtech Group in Portugal is hiring a Junior International Roaming & NOC Engineer for a hybrid role located in Fundão, Porto or Lisbon. The position requires 60% remote work and 40% on-site, with a 24x7 shift-based schedule and a focus on international roaming services support.

You will monitor services, detect alarms, perform first-level troubleshooting, and coordinate escalations with L2/L3 teams, vendors and operators, while learning LTE, VoLTE, 5G, IMS and signaling protocols in a global

Qualifications

• Degree or technical education in Telecommunications, Networking, CS or related field.
• At least 1 year of experience in telecom, networking, NOC operations or similar.
• Basic IP networking knowledge.
• Multilingual: Portuguese, English and Spanish.
• Willingness to work a 24x7 shift.
• Portugal-based with hybrid work model.

Responsibilities

• Monitor international roaming services and platforms on a 24x7 basis.
• Detect alarms, incidents, service degradation and availability issues.
• Analyse and categorise incidents according to their severity and impact.
• Perform initial troubleshooting using established procedures and runbooks.
• Open, update, monitor and close incident tickets.
• Escalate complex incidents to L2/L3 teams, vendors, suppliers or partner operators.
• Maintain clear communication with internal and external stakeholders throughout the incident lifecycle.
• Ensure compliance with SLAs and operational procedures.
• Participate in maintenance activities, planned interventions and technical changes.
• Produce operational records, shift handover notes and service reports.
• Monitor operational KPIs and service-quality indicators.
• Contribute to continuous improvement of operational processes.
• Identify opportunities to automate recurring monitoring and support activities.
• Support service availability and quality for international roaming customers.

Skills

Portuguese language

English language

Spanish language

IP networking basics

Analytical thinking

Team communication

Education

Degree or technical education in Telecommunications/Networking/CS

Job description

JUNIOR INTERNATIONAL ROAMING & NOC ENGINEER (HYBRID FUNDÃO, PORTO OR LISBON)

Portuguese company hires for hybrid position

Location: Fundão, Porto or Lisbon, Portugal

Only candidates already based in Portugal will be considered

Work Model: Hybrid — approximately 60% remote and 40% on-site

Schedule: 24x7 shift-based operation

Language Requirements: Fluent Portuguese, English and Spanish — mandatory

Seniority: Júnior (1+ years)

Sector: Telecommunication

Rate Between €1500 - 1800 RV

About the Opportunity

We are looking for a Junior International Roaming & NOC Engineer to support the continuous operation of international roaming services and platforms.

You will be responsible for service monitoring, initial incident detection, alarm handling and first-level troubleshooting. You will also coordinate escalations with specialised support teams, technology vendors, suppliers and international mobile operators.

This is an excellent opportunity for a junior telecommunications professional who wants to deepen their knowledge of LTE, VoLTE, 5G, IMS, mobile core networks and signalling protocols within an international 24x7 operations environment.

Main Responsibilities

• Monitor international roaming services and platforms on a 24x7 basis.
• Detect alarms, incidents, service degradation and availability issues.
• Analyse and categorise incidents according to their severity and impact.
• Perform initial troubleshooting using established operational procedures and runbooks.
• Open, update, monitor and close incident tickets.
• Escalate complex incidents to L2/L3 teams, vendors, suppliers or partner operators.
• Maintain clear communication with internal and external stakeholders throughout the incident lifecycle.
• Ensure compliance with established SLAs and operational procedures.
• Participate in maintenance activities, planned interventions and technical changes.
• Produce operational records, shift handover notes and service reports.
• Monitor operational KPIs and service-quality indicators.
• Contribute to the continuous improvement of operational processes.
• Identify opportunities to automate recurring monitoring and support activities.
• Support service availability and quality for international roaming customers.

Mandatory Requirements

• Degree or technical education in Telecommunications, Networking, Computer Science or a related field.
• At least one year of experience in telecommunications, networking, technical support, NOC operations or a similar area.
• Basic knowledge of IP networking.
• Basic understanding of mobile networks and international roaming services.
• Strong analytical and problem-solving skills.
• Fluent Portuguese.
• Fluent English.
• Fluent Spanish.
• Ability to communicate effectively in a multilingual technical environment.
• Availability to work in a 24x7 shift-based operation.
• Availability for the hybrid model in Fundão, Porto or Lisbon.

Valued Knowledge

Roaming and Mobile Core

• International roaming.
• LTE roaming.
• VoLTE roaming.
• 5G roaming.
• IP Multimedia Subsystem.
• IP Exchange networks.
• Mobile core architecture.

Signalling Protocols

• SS7.
• SIGTRAN.
• Diameter.
• SIP.
• Mobile network signalling and call flows.

Subscriber and Authentication Platforms

• Home Location Register.
• Home Subscriber Server.
• Unified Data Management.
• Unified Data Repository.
• Domain Name System.
• Authentication, Authorization and Accounting.

Interconnection Platforms

• Signal Transfer Point.
• Diameter Routing Agent.
• Session Border Controller.
• Roaming Hub.
• International operator interconnections.

Operations and Support

• Experience in NOC, SOC or SNOC environments.
• Alarm monitoring and event management.
• Incident management and escalation processes.
• First-level troubleshooting.
• Monitoring and observability tools.
• ITSM and ticket management platforms.
• Operational KPI and SLA monitoring.
• Maintenance activities and planned works.
• Technical documentation and operational reporting.

Soft Skills

• Strong sense of responsibility and ownership.
• Analytical and problem-solving mindset.
• Clear verbal and written communication.
• Ability to remain calm and effective under pressure.
• Attention to detail and operational discipline.
• Collaborative and team-oriented approach.
• Proactive attitude.
• Strong willingness to learn.
• Ability to follow established procedures.
• Good organisation and prioritisation skills.
• Reliability when working in shifts and critical environments.

The Ideal Profile

The ideal candidate is at the beginning of their telecommunications career and already has initial experience in a NOC, technical support, networking or mobile operations environment.

You understand the fundamentals of IP and mobile networks and are interested in developing deeper expertise in international roaming, LTE, VoLTE, 5G, IMS and signalling protocols.

You are comfortable monitoring critical services, investigating alarms, opening and tracking incidents and escalating technical problems according to defined procedures. You remain organised under pressure and communicate confidently in Portuguese, English and Spanish.

You are also available to work rotating shifts in a 24x7 environment and attend the office in Fundão, Porto or Lisbon according to the hybrid working model.

Questions for Candidates

1. Are you currently based in Portugal?
2. Which location can you attend: Fundão, Porto or Lisbon?
3. Are you available for a hybrid model with approximately 40% on-site work?
4. Are you available to work rotating shifts in a 24x7 operation?
5. What are your proficiency levels in Portuguese, English and Spanish?
6. How many years of experience do you have in telecommunications, networking, NOC operations or technical support?
7. Do you have professional or academic knowledge of IP networking?
8. What experience do you have with mobile networks and international roaming?
9. Do you have knowledge of LTE, VoLTE, 5G, IMS or IPX?
10. Have you worked with SS7, SIGTRAN, Diameter or SIP?
11. Are you familiar with HLR, HSS, UDM, UDR, DNS or AAA?
12. Do you have experience with STP, DRA, SBC or roaming hubs?
13. Have you worked in a NOC, SOC or SNOC environment?
14. Which monitoring, observability or ticketing tools have you used?
15. Do you have experience managing incidents and escalating them to L2/L3 teams or external vendors?
16. Have you monitored operational KPIs and SLAs?
17. What is your expected monthly rate?
18. What is your availability to start?

CV Keywords

Junior International Roaming Engineer, Roaming Operations Engineer, NOC Engineer, Network Operations Center, NOC, Roaming Operations, International Roaming, Mobile Roaming, Telecommunications, Mobile Networks, Mobile Core, IP Networking, TCP/IP, LTE, LTE Roaming, VoLTE, VoLTE Roaming, 5G, 5G Roaming, IMS, IP Multimedia Subsystem, IPX, IP Exchange, SS7, SIGTRAN, Diameter, SIP, Signalling Protocols, HLR, Home Location Register, HSS, Home Subscriber Server, UDM, Unified Data Management, UDR, Unified Data Repository, DNS, AAA, Authentication Authorization Accounting, STP, Signal Transfer Point, DRA, Diameter Routing Agent, SBC, Session Border Controller, Roaming Hub, NOC Operations, SOC, SNOC, Network Monitoring, Service Monitoring, Alarm Management, Event Management, Incident Management, Incident Detection, Incident Categorisation, First-Level Support, L1 Support, L1.5 Support, Troubleshooting, Incident Escalation, L2 Support, L3 Support, ITSM, Ticket Management, ServiceNow, Monitoring Tools, Observability, SLA, KPI, Service Availability, Service Quality, Maintenance Activities, Planned Works, Operational Reporting, Process Automation, 24x7 Support, Shift Work, Portuguese, English, Spanish

#00353700