The English-language job board for Spain

Mobile Core Network Engineer

On-site in Madrid·Added today (last checked 20 Oct)

Digi Spain

140 open roles

Apply

Overview

Work mode: On-site, Madrid
Contract: Permanent contract
English: Required
Education: University degree
Benefits: Private health insurance, life insurance, flexible pay plan, meal vouchers

Visa options

The ad doesn’t mention sponsorship
Not a refusal, but not a yes. Worth asking in your first message.

Find jobs with visa support

Skills

This job advert was originally written in Spanish.

Requirements

What we're looking for

Knowledge

Knowledge of mobile networks (2G, 3G, 4G, 5G)
Knowledge of Core Network: MSC, IMS
Knowledge of protocols: SIP, Diameter, SS7, GTP
Ability to analyze traces (SIP, Diameter, SS7)
Knowledge of troubleshooting tools and network analysis
Knowledge of network operating procedures
Understanding of the interrelationship between different network elements and services

Requirements

Experience in mobile network operations or Core Network engineering
Experience in advanced troubleshooting on mobile networks
Experience in operating/configuring Core Network elements
Experience in mobile operator environments (MNO/MVNO)
Degree in Telecommunications Engineering or similar

Nice to have

High analytical and problem-solving skills.
Ability to work under pressure
Technical autonomy in incident resolution
Organization and prioritization of tasks
Proactivity in identifying and resolving problems
Effective communication with technical teams
Teamwork.
Continuous learning capability

Languages

Advanced English.

Pay & benefits

What you'll get

Permanent contract.
Home internet and health insurance (both after six months).
Life insurance from the start of the contract.
Good working environment and camaraderie.
Joining a fast-growing company with great promotion opportunities.
At DIGI we also offer a flexible compensation plan so you can choose the services that best suit your lifestyle: restaurant tickets, childcare, transportation, and health insurance for family members.

The role

What you'll do

We are looking to hire a Mobile Operations Engineer with the following responsibilities:

Executing scheduled and unscheduled tasks on the mobile network (CORE NETWORK)
Analyzing and troubleshooting incidents in the Core Network (CS/IMS) and associated services
Supporting the resolution of critical incidents
Performing in-depth technical analysis of incidents and failures, including review of traces and signaling
Executing technical tests and validations
Escalating to Engineering or vendors when necessary, with a detailed prior diagnosis
Monitoring incidents until their resolution, ensuring the technical quality of the solution
Acting as the technical point of contact with NOC/COR, Engineering, and vendors
Supporting the analysis of KPIs and detection of service degradations
Developing and improving technical operating procedures
Documenting incidents, analyses, and applied solutions
Participating in operational improvements and network optimization
Providing technical support to other areas when required

About Digi Spain

Digi Spain is the Spanish subsidiary of Digi Communications, a major European telecommunications group headquartered in Bucharest, Romania. The company operates as a mobile virtual network operator (MVNO) and also provides fixed broadband services, including FTTH (fiber-to-the-home) installations, across Spain. With a strong focus on competitive pricing and expanding its network infrastructure, Digi Spain has grown rapidly, offering services to both residential and business customers.

In Spain, Digi has established a significant presence with offices and operations in multiple cities, including Madrid and Barcelona, and is actively expanding its fiber network across the country. The company is known for its dynamic work environment and offers numerous field-based roles such as FTTH installers, commercial agents, and technical positions, making it an attractive option for international professionals seeking hands-on roles in the telecom sector. Digi Spain values operational efficiency and customer satisfaction, providing opportunities for career growth in a fast-paced industry.

Industry: Telecom
Founded: 2008
Employees: 1,000–5,000
Headquarters: Bucharest, Romania
In Spain: Madrid, Barcelona
Website: digimobil.es

Good to know if you are moving

Digi Spain is part of a large European telecom group, offering potential for career growth within the broader Digi Communications network.
The company is actively expanding its fiber network across Spain, creating numerous field-based roles such as FTTH installers and technicians.
Many roles are customer-facing and may require Spanish language skills, but technical positions may be accessible to international candidates with relevant experience.
Digi Spain has a strong focus on competitive pricing and operational efficiency, which can provide a dynamic and fast-paced work environment.
The company has a presence in multiple Spanish cities, offering opportunities in various regions beyond Madrid and Barcelona.

In their own words

About the company & team

We are a telecommunications operator present in the Spanish market since 2008, offering fixed and mobile telephone and internet services, as well as television. We have our own high-performance fiber optic network that allows us to be leaders in internet access speed; and focused on the residential segment, we have our own stores and a wide distribution network for the commercialization of our services throughout Spain.

We belong to the DIGI Communications Group with over 30 years of experience in the telecommunications sector. Originating from Romania, where we have our main business, we are also present, in addition to Spain, in Portugal, Italy, and Belgium.

Additional information

If you are interested, apply and we will provide you with all the details.

Our commitment at DIGI is to promote work environments in which people are treated with respect and dignity, ensuring equal opportunities in their selection, training and promotion, and offering a workplace free from any kind of discrimination.

We inform you that your data will be processed by the companies of the DIGI Spain Group (DIGI Spain Telecom, S.L.; DIGI Spain Sales Force, S.L.; DIGI Spain Call Center S.L.), depending on the selection process in which you participate, for the purpose of evaluating your application. You may exercise your rights and obtain additional information through our Privacy Policy: https://www.digimobil.es/legal/politica-privacidad-seleccion

All open roles at Digi Spain