VOIP ENGINEER – MID LEVEL (HYBRID)

iTRTech Group; Lisboa; Híbrido; EUR 15 000 - 19 000; Tempo integral

Resumo da oferta

iTRTech Group in Lisbon is seeking a mid-level VoIP Engineer to support and evolve business-critical voice services within a telecommunications environment. This hybrid role requires two days per week in Lisbon; you will monitor performance, investigate incidents, and work with SBCs, SIP routing, load balancing, and interconnections.

The ideal candidate has 3+ years of VoIP experience, strong troubleshooting, Linux and IP networking skills, and English at B2 level. Portuguese is a plus.

Qualificações

• At least three years of experience operating or supporting VoIP services and platforms.
• English proficiency at B2 level; Portuguese is a plus.

Responsabilidades

• Operate and support VoIP platforms and voice services;
• Monitor service performance, availability, and stability;
• Troubleshoot incidents involving SIP signalling, SBCs, voice routing, and service interconnections;
• Support Oracle SBC, Huawei SBC, BroadSoft/Cisco voice platforms;
• Analyse alarms, logs, and traces to identify the root cause of service issues;
• Collaborate with technical teams during incident investigation and resolution;
• Participate in maintenance, upgrades, and new-service implementation activities;
• Support IP networking, load-balancing, and DNS services related to voice infrastructure;
• Maintain technical and operational documentation;
• Contribute to service optimisation and continuous‑improvement initiatives.

Conhecimentos

VoIP

SIP Signalling

SBC

Oracle SBC

Huawei SBC

Linux

IP Networking

Log Analysis

Incident Investigation

Ferramentas

Oracle SBC

Huawei SBC

BroadSoft/Cisco voice platforms

A10 Load Balancers

DNS

Linux

Descrição da oferta de emprego

VOIP ENGINEER – MID LEVEL (HYBRID LISBON)

Portuguese company hires for hybrid position

Location: Lisbon, Portugal

Only candidates already based in Portugal will be considered

Work Model: Hybrid — two days per week in Lisbon

Language Requirements: English B2 — mandatory; Spanish B1 — desirable

Seniority: Mid-level (3+ years)

Sector: Telecommuncations

Rate Between €1300 - 1700 RV

About The Opportunity

We are looking for an experienced VoIP Operations Engineer to support and evolve business-critical voice services within a telecommunications environment.

You will monitor platform performance, investigate complex incidents, and help maintain the availability and stability of VoIP services. The position provides hands‑on exposure to enterprise voice platforms, Session Border Controllers, SIP signalling, routing, load balancing, and service interconnections.

This opportunity is ideal for someone who enjoys technical troubleshooting, service operations, and collaborating with multidisciplinary teams to ensure service continuity.

Key Responsibilities

• Operate and support VoIP platforms and voice services;
• Monitor service performance, availability, and stability;
• Troubleshoot incidents involving SIP signalling, SBCs, voice routing, and service interconnections;
• Support Oracle SBC, Huawei SBC, BroadSoft/Cisco, Huawei NGN, and Ericsson MPS platforms;
• Analyse alarms, logs, and traces to identify the root cause of service issues;
• Collaborate with technical teams during incident investigation and resolution;
• Participate in maintenance, upgrades, and new-service implementation activities;
• Support IP networking, load‑balancing, and DNS services related to voice infrastructure;
• Maintain technical and operational documentation;
• Contribute to service optimisation and continuous‑improvement initiatives.

Essential Requirements

• At least three years of experience operating or supporting VoIP services and platforms;
• Good knowledge of SIP signalling, voice routing, and VoIP interconnections;
• Practical experience with Session Border Controllers;
• Experience with Oracle SBC or Huawei SBC environments;
• Familiarity with carrier-grade or enterprise voice platforms;
• Understanding of IP networking and Linux environments;
• Experience analysing logs, alarms, and network or SIP traces;
• Strong troubleshooting and analytical skills;
• Previous experience in a telecommunications service‑provider environment;
• English proficiency at B2 level;
• Availability to work two days per week in Lisbon.

Relevant Platform Experience

• Oracle SBC;
• Huawei SBC;
• BroadSoft or Cisco voice platforms;
• Huawei NGN;
• Ericsson MPS;
• Cisco or Huawei networking;
• Linux;
• A10 Load Balancers;
• DNS services supporting voice infrastructure.

Nice-to-Have Qualifications

• Spanish proficiency at B1 level;
• Experience with both Oracle and Huawei SBC platforms;
• Knowledge of BroadSoft/Cisco voice environments;
• Experience with Huawei NGN or Ericsson MPS;
• Familiarity with A10 Load Balancers;
• Participation in voice‑platform migrations, upgrades, or implementations;
• Experience supporting high‑availability telecommunications services.

Ideal Candidate Profile

The ideal candidate is a hands‑on VoIP professional who combines solid technical knowledge with a structured approach to service operations.

You are likely to succeed in this role if you:

• Understand how SIP signalling, SBCs, routing, and interconnections work together;
• Investigate incidents methodically using alarms, logs, and traces;
• Remain calm and organised during service‑impacting incidents;
• Take ownership of technical issues through resolution;
• Collaborate effectively with Network, Operations, Engineering, and Service teams;
• Prioritise service availability, stability, and operational quality;
• Maintain accurate technical documentation;
• Look for recurring issues and opportunities to improve service reliability;
• Communicate confidently in English within an international environment.

Questions for Candidates

• How many years of experience do you have supporting VoIP services?
• Which VoIP or voice platforms have you worked with?
• What practical experience do you have with SIP signalling and voice routing?
• Have you supported Oracle SBC, Huawei SBC, or another Session Border Controller?
• What experience do you have with BroadSoft or Cisco voice platforms?
• Have you worked with Huawei NGN or Ericsson MPS?
• How do you normally investigate SIP or voice‑service incidents?
• Which tools have you used to analyse logs, alarms, or SIP traces?
• What is your experience with Cisco, Huawei, Linux, and IP networking?
• Have you supported A10 Load Balancers or DNS services within a voice environment?
• Have you participated in platform maintenance, upgrades, migrations, or new‑service implementations?
• Do you have experience working for a telecommunications operator or service provider?
• What is your English proficiency level?
• What is your Spanish proficiency level?
• Are you currently based in or able to commute to Lisbon twice per week?
• Is the stated compensation range aligned with your expectations?
• What is your earliest possible start date?

Recommended CV Keywords

VoIP Operations Engineer, VoIP Engineer, Voice Engineer, Voice Operations, Telecommunications, Telecom, VoIP, Voice Services, SIP, SIP Signalling, SIP Trunking, Voice Routing, VoIP Interconnection, Session Border Controller, SBC, Oracle SBC, Oracle Communications Session Border Controller, Huawei SBC, BroadSoft, Cisco BroadWorks, Cisco Voice, Huawei NGN, Next Generation Network, Ericsson MPS, IP Networking, TCP/IP, Cisco, Huawei, Linux, A10 Load Balancer, Load Balancing, DNS, Telecom Operations, Network Operations, Service Operations, Incident Management, Troubleshooting, Root Cause Analysis, Log Analysis, Alarm Monitoring, SIP Traces, Service Monitoring, High Availability, Service Continuity, Platform Maintenance, Platform Upgrades, Voice Migration, Technical Documentation

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