Core Network Engineer

Airalo

~$69,370 - $128,830Market Estimate

Spain

Full-Time

Mid (3-6 yrs)

IT & Security

Posted on September 22, 2026

Your main responsibilities will be:

Designing the IP infrastructure of our multi-site data centers

Designing the GRX/IPX interconnectivity and global PoP structure to access mobile partner networks

Defining the WAN network strategy

Leading and realization of the data centre LAN and WAN networks, specifically the configuration of DRAs, GTPs, GGSN/PGW, SBC, FW, Routers

Integrating direct roaming agreements and sponsored roaming agreements

Tracing of signalling and user plane transport for debug issues

Acting as a primary interface between the Core Network team and Airalo’s Platform team, Airalo’s Network Operations team and technology partners (vendors, roaming partners)

Core network optimisation and enhancement

Supports the operations team in regards to:

Deployments and rollouts

Performance improvements

Perform trainings

Supporting the partner’s operations team

What You'll Bring

Technical Degree in Engineering or Telecommunications preferred or equivalent experience demonstrated

3 - 5 years minimum relevant experience in the telecom core field

3+ years experience with network elements such as: Packet Gateway GGSN/PGW/DPI, direct and sponsored roaming (HLR/HSS), diameter routing and GTP, GRX

3+ years experience with these protocols; Sigtran: MAP (Mobile Application Protocol), Sigtran: CAP (Camel 1-3), Diameter (Ro, Gx, Gy, Gn, Gi), REST API, BGP

Excellent verbal and written communication skills

Bonus Points

IREG Testing experience is preferred

International working experience is ideal

Why People Join Us

We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product were customers first.

Our team spans 60+ countries, united by a shared belief that great work happens when people are trusted to own what they do. There's trust to own what you do, space to focus without constant layers of process, and a clear sense of what you're responsible for from day one.

As Airalo continues to grow, so do the opportunities to learn, take on new challenges, and make a real impact - from anywhere in the world.

Before You Hit Apply

By applying, you acknowledge and agree that, in case of successful application, Airalo may request to run background checks as a condition for entering into an agreement with you. Rest assured that these checks will only occur upon your prior consent and at the end of the selection process, and will be strictly limited to what is allowed under the laws that are applicable to you. All data that you share or that we collect in connection with such checks will be processed in accordance with our Privacy Policy, available here: www.airalo.com/more-info/privacy-policy?srsltid=AfmBOooBT0rXAj1FaNelZ3VfN0wvhwzvAoxdtHnOKSVETpiSjiXVuycy

We sincerely thank all applicants in advance for submitting their interest in this opportunity. Airalo is an equal-opportunity employer and values diversity, equity & inclusion. We do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We are committed to providing reasonable accommodations upon request for individuals with disabilities throughout our job interview process.

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