Referso Jobs

Telecom Data Analyst

RADCOM Ltd · Posted Nov 9, 2026

Open

Brazil
5+ years

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Telecom Data Analyst

RADCOM Ltd · Posted Nov 9, 2026

Open

Brazil
5+ years

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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

Customer Network Support Engineer

Ericsson · Posted Nov 9, 2026

Open

North Ryde, New South Wales, Australia
On-site
Full-time · Mid

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Seeking a dedicated Support Engineer to join a small IMS support team focused on 5G Core and Cloud Core for NACI customers. The role involves owning complex L2/L3 incidents, improving network stability, and working with cross-functional teams to reduce outages and deliver high-performing 5G Cloud Core solutions.

Responsibilities

Lead investigations and drive the resolution of complex L2/L3 incidents across IMS, 5G Core and Cloud Core environments.
Restore customer networks and services during critical incidents, taking ownership of fault isolation, advanced troubleshooting and service recovery.
Analyse system behaviour, identify root causes and work with problem management to prevent repeat faults and improve live network stability.
Collaborate with product, project and delivery teams to support safe introduction of new CCxx releases and operational changes.
Communicate clearly with customers and internal stakeholders during high-pressure incidents, providing timely updates and practical technical guidance.

Skills

IMS architecture VoLTE VoWiFi SIP SDP Diameter

Líder de Ing. Core de Voz y Datos móviles

Telefónica · Posted Nov 7, 2026

Open

Caracas, Venezuela
1+ years

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Realizar la ingeniería, implementación y despliegue para el desarrollo de soluciones integradas de elementos del Core, Plataformas y OSS.

Responsibilities

Realizar la ingeniería e implementación de nuevas elementos y servicios para el Core, plataformas y OSS.
Revisiones HLD/LLD.
Coordinar actividades con proveedores para el despliegue de nuevas soluciones y participar proactivamente en proyectos de nuevas tecnologías y servicios.
Interactuar con el área de planificación para la revisión de RFI para la compra de nuevos equipos y servicios.
Interactuar con el área de operación y mantenimiento para coordinar ventanas de mantenimiento y troubleshooting en el caso de ser necesario.

Requirements

Título Superior en Ingeniería en Telecomunicaciones, Ingeniería Electrónica, Sistemas o afines
Nice to have: Deseables conocimientos en Infraestructuras virtualizadas (VNF, CNF)
Nice to have: Conocimiento general en terminología y arquitectura de Redes de Comunicaciones móviles celulares (GSM, UMTS, HSPA, LTE, VOLTE, 5G)
Nice to have: Conocimiento intermedio o avanzado del idioma inglés (hablado y escrito)

Skills

Conocimientos en elementos de la red de Core de Voz Móvil y fija

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

Solution Architect

Ericsson · Posted Nov 6, 2026

Open

Noida, Uttar Pradesh, India
Senior
10+ years

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Own the architecture, technical planning, and delivery of IMS LCM scopes for telecom operators. Lead end-to-end lifecycle activities including upgrades, migrations, expansions, and maintenance while providing technical leadership across teams.

Responsibilities

Own technical design and execution for IMS nodes, including CSCF, TAS, SBC, MRF, DNS/ENUM, and HSS
Ensure solutions align with HLD/LLD, customer requirements, CPI, and 3GPP standards
Prepare and review NIRs, MOPs, upgrade, rollback, and contingency plans
Lead live-network LCM activities, upgrades, testing, acceptance, and handover
Validate VoLTE, VoWiFi, SIP/Diameter signaling, call flows, configurations, and KPIs

Requirements

All academic credentials must be from recognized and accredited institutions
Nice to have: Wireshark
Nice to have: multi-vendor telecom environments
Nice to have: IMS/VoLTE or vendor product certifications
Nice to have: AWS/Azure

Skills

IMS LCM upgrades migrations IMS architecture CSCF

Senior PIDS Support Engineer

Ericsson · Posted Nov 6, 2026

Open

Seoul, Seoul, South Korea
Senior
5+ years

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Provide advanced technical support for Packet Core network products and solutions, diagnosing and resolving complex issues across multiple regions.

Responsibilities

Diagnose, analyze, and resolve technical problems to minimize operational impacts on customer networks.
Provide advanced technical support for FLV, FFI and deployment, addressing complex technical challenges in customer deployments.
Troubleshoot mobile/core network components (EPC/4G: MME, SGW, PGW, PCRF; 5G: AMF, SMF, UPF, PCF, NSSF, AUSF, UDM, NRF) and related functions.
Take active part in emergencies, contributing to timely fault isolation and restoration of customer solutions and networks.
Collaborate with product development teams to provide feedback that drives product enhancements and quality improvements.

Skills

Packet Core network products GTP NGAP/S1AP PFCP Diameter SIP SCTP

Consultant III

F5 · Posted Nov 5, 2026

Open

Guadalajara
5+ years

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F5 Consultant is an innovative engineer working in partnership with clients, advising them on F5 ADC solutions, providing strategic guidance and subject matter expertise for implementation and configuration of core F5 BIG-IP products.

Responsibilities

Provides technical guidance to customers onsite and/or remotely regarding implementation, configuration and maintenance of F5 BIG-IP core products independently or with a team
Performs as project lead and/or key contributor for problem identification, systems architecture definition, solution design, implementation, testing, client training, deployment, troubleshooting and documentation
Performs basic project management activities including interaction with company and client managers, cost/schedule monitoring, project status update reports, and expectation management for the delivery of work products and associated risks
Manages customer interaction and engagement over the course of the assigned projects
Maintains working proficiency in F5 products and technologies through self-directed and formal training

Requirements

BS/BA degree or equivalent work experience

Skills

firewalling application availability security

Senior Solution Integrator

Ericsson · Posted Nov 5, 2026

Open

Noida, Uttar Pradesh, India
Senior

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Responsible for managing the end-to-end life cycle of IMS network nodes, including upgrades, migrations, expansions, and decommissioning activities within telecom networks.

Responsibilities

Plan and execute software upgrades, patches, and hardware replacements for IMS nodes
Perform node expansions, migrations, and decommissioning in live networks
Prepare NIRs, MOPs, and rollback plans; execute activities with minimal service impact
Ensure alignment with HLD/LLD, CPI, and customer requirements
Conduct pre/post-upgrade, regression, SIT, IOT, and UAT testing

Requirements

Nice to have: understanding of Ericsson IMS product portfolio
Nice to have: LCM procedures

Skills

SIP SDP DIAMETER VoLTE VoWiFi Linux/Unix OpenStack K8s

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

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