Referso Jobs

FIELD TECHNICIAN III - PUB SEC

Lumen Technologies · Posted Nov 10, 2026

Open

San Diego, California, United States
Senior
5+ years

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FIELD TECHNICIAN III - PUB SEC

Lumen Technologies · Posted Nov 10, 2026

Open

San Diego, California, United States
Senior
5+ years

Apply with Referso

Engineer - FTTH Core Network Planning.Network NG

MTN · Posted Nov 9, 2026

Open

Ikoyi, Lagos, Nigeria
3–7 years

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Design, dimension, and optimize MTNN’s FTTH Core (Data & Voice) network architecture and capacity, support planning and deployment of new solutions, conduct feasibility studies, and maintain network modeling tools.

Responsibilities

Design and dimension the FTTH Core (Data & Voice) network
Support planning and design of FTTH Core architecture
Implement optimal network topology for FTTH Core platforms
Plan evolution of Data/voice solutions
Provision network capacity for FTTH Core elements

Requirements

First Degree in Electrical, Electronics, Computer, Systems Engineering or any relevant science courses

Skills

Wi-Fi FWA FTTH PON CDN BRAS/BNG AAA DNS IMS

Líder de Ing. Core de Voz y Datos móviles

Telefónica · Posted Nov 7, 2026

Open

Caracas, Venezuela
1+ years

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Lead engineering, implementation and deployment of core voice and mobile data solutions, including network changes, services and transformational processes.

Responsibilities

Engineer and implement new core elements and services
Review HLD/LLD
Coordinate with vendors for deployment
Participate in new technology projects
Interact with planning for RFI reviews

Requirements

Bachelor's degree in Telecommunications Engineering, Electronic Engineering, Systems or related fields
Nice to have: Virtualized infrastructures (VNF, CNF)

Skills

Core Voice Mobile and Fixed Network elements (MSS, MSC, MGW, TGW, IMS)Core IMS elements Signalling elements (STP, DRA, SSR)Value‑added platforms Mobile data network (MME, GGSN, DPI, PCRF)Data Translation handling

Roaming Operations Engineer L2

Capgemini · Posted Oct 8, 2026

Open

Lisbon, Lisbon District, Portugal
Hybrid

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Analyze and resolve complex incidents escalated by the L1 team, perform advanced troubleshooting of international roaming platforms and services, conduct root cause analysis, coordinate incident resolution with international operators, suppliers, and equipment vendors, provide technical leadership during high-impact situations and critical incidents, support and validate change implementations, planned works, and maintenance activities, produce technical documentation, operational procedures, and post-incident reports, support the training and technical development of L1 teams, identify automation and operational optimization opportunities, and participate in technology evolution and operational transformation projects.

Responsibilities

Analyze and resolve complex incidents escalated by the L1 team
Perform advanced troubleshooting of international roaming platforms and services
Conduct Root Cause Analysis (RCA) and define corrective and preventive actions
Coordinate incident resolution with international operators, suppliers, and equipment vendors
Provide technical leadership during high-impact situations and critical incidents

Requirements

Nice to have: VoWiFi Roaming
Nice to have: 5G Roaming
Nice to have: IPX networks
Nice to have: Roaming interworking
Nice to have: STP

Skills

International Roaming concepts Telecommunications operations Mobile Core networks

Engineer-Packet Core

Ericsson · Posted Nov 6, 2026

Open

Noida, Uttar Pradesh, India
2+ years

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Engineer-Packet Core

Responsibilities

Ensure configuration/upgrades/updates on various PS Core nodes monitoring and review of TT, CR and AT on daily basis
Ensure MSTOP Processes are followed in the Workplace
Ensure Password policies, security policies and audits are properly & periodically followed
Contribute in the creation and improvements to procedures and routines within the department / group
Ensure configuration/Trouble Tickets/Troubleshooting/Security Compliances on various Core nodes on Ericsson Network Architecture

Skills

Protocol expertise (SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, SIP, SDP, GTP, Diameter signaling)Call flows and Call scenarios Multiple Test Cases Hands on experience on AXE 810, APZ 214 01/03, APG 43L, M-MGw GMPv3 & GMPv4, SIS-BC, BSP-BC Hands on experience on Huawei MSOFTX3000, UMG8900, SE2900

Technical Solutions Expert

Orange · Posted Nov 5, 2026

Open

Cairo, Cairo, Egypt
Hybrid
Full-time · Mid
3–7 years

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Ensure outstanding customer experience by owning incidents/changes assigned according to shift rules, ensuring service restoration and troubleshooting of voice services.

Responsibilities

Own incidents/changes assigned according to shift rules
Own incident through its life ensuring service restoration & customer's business continuity
Ensure efficient analysis, troubleshooting and restoration of voice services including multivendor platforms & Orange core voice network
Resolve incidents within the set(SLA/SLO) & our KPIs
Liaise with higher technical support levels, teams & vendors to drive incident resolution

Requirements

Bachelor’s degree in Telecommunications or Computer Engineering
Nice to have: Microsoft TEAMS certification
Nice to have: Audio Codes certification
Nice to have: CCNP Voice
Nice to have: French

Skills

Switched Voice SIP tracing/ Analysis H.323 SIP SS7 ISDN

Technical Solutions Expert

Orange · Posted Nov 5, 2026

Open

Cairo, Cairo, Egypt
Hybrid
Mid
3–7 years

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Ensure outstanding customer experience and manage incidents for voice services across a global network.

Responsibilities

Own incidents/changes according to shift rules
Ensure incident life cycle and service restoration
Analyze, troubleshoot and restore voice services
Resolve incidents within SLA/SLO
Liaise with higher technical support levels and vendors

Requirements

Bachelor’s degree in Telecommunications or Computer Engineering

Skills

Switched Voice SIP tracing Microsoft Teams Audio Codes CCNP Voice H.323 SIP SS7 ISDN SBC

Technical Solutions Expert

Orange Business · Posted Nov 6, 2026

Open

HELIOPOLIS, Egypt
Hybrid
Full-time · Mid
3–7 years

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Ensure outstanding customer experience by managing incidents and changes related to voice services, ensuring service restoration and continuity.

Responsibilities

Own incidents/changes assigned according to shift rules
Own incident through its life ensuring service restoration & customer's business continuity
Ensure efficient analysis, troubleshooting and restoration of voice services including multivendor platforms & Orange core voice network
Resolve incidents within the set(SLA/SLO) & our KPIs
Liaise with higher technical support levels, teams & vendors to drive incident resolution

Requirements

Bachelor’s degree in Telecommunications or Computer Engineering
Nice to have: CCNP Voice
Nice to have: French

Skills

Switched Voice experience SIP tracing/ Analysis Microsoft TEAMS certification Audio Codes certification H.323 SIP

UDM Integration Engineer

Ericsson · Posted Nov 5, 2026

Open

Noida, Uttar Pradesh, India
6–10 years

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Responsibilities

Plan and execute UDM nodes upgrade (HSS,CCDM,CCRC,CCSM)
Perform pre-checks, health checks, and post-upgrade validations
Execute software installation, patching, and traffic migration activities
Ensure service continuity during maintenance windows and traffic cutovers
Troubleshoot integration and post-upgrade issues across network elements

Requirements

Nice to have: Experience delivering projects for global operators
Nice to have: Hands-on exposure to Ericsson UDC Systems
Nice to have: Knowledge of Front-end application & call flows
Nice to have: Experience with Implementation, Integration, Acceptance Tests, Upgrades, O&M & Troubleshooting on telecommunication products
Nice to have: Knowledge of UDM or SDM products

Skills

Python Shell 4G core network 5G core network UDM solutioning UDM design

VAS Engineer

Premier Service & Recruitment · Posted Nov 7, 2026

Open

Cairo, Cairo, Egypt
On-site
Full-time · Senior
5+ years

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We are looking for a skilled VAS Engineer with strong Huawei vendor experience to join our Back Office operations team. In this role, you will be responsible for the maintenance, troubleshooting, operational support, and optimization of Value-Added Services platforms to ensure high availability and performance.

Responsibilities

Oversee day-to-day Back Office operational support, routine maintenance, and incident management for VAS platforms.
Perform deep-dive troubleshooting, root cause analysis (RCA), and system health checks on Huawei VAS solutions (e.g., SMSC, MMSC, USSD, IN, Voicemail).
Handle software upgrades, patch deployments, configuration changes, and integration tasks.
Coordinate with vendor technical support and cross-functional network operations centers (NOC) to resolve complex network issues within agreed SLAs.
Monitor system performance, capacity, and security compliance.

Requirements

Nice to have: analytical skills
Nice to have: problem-solving skills
Nice to have: communication skills

Skills

Huawei architecture and platforms telecom protocols MAP SS7

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