Help Us Build The Future of TravelAt Airalo, we're making it easier for people to stay connected wherever they travel. As the world's first eSIM store, we help millions of travelers access affordable mobile data in 200+ countries and regions around the world. We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.

Your Next DestinationLocation: Remote.

Contract: Full-time, permanent. Learn more about our benefits here in this link - English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async. Designing the IP infrastructure of our multi-site data centersDesigning the GRX/IPX interconnectivity and general PoP structure to access mobile partner networksDefining the WAN network strategyLeading and realization of the data centre LAN and WAN networks, specifically the configuration of DRAs, GTPs, GGSN/PGW, SBC, FW, RoutersIntegrating direct roaming agreements and sponsored roaming agreementsTracing of signalling and user plane transport for debug issuesActing 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 enhancementSupports the operations team in regards to:



Deployments and rolloutsPerformance improvementsPerform trainingsSupporting the partner's operations teamWhat You'll BringTechnical Degree in Engineering or Telecommunications preferred or equivalent experience demonstrated3 - 5 years minimum relevant experience in the telecom core field3+ years experience with network elements such as: Packet Gateway GGSN/PGW/DPI, direct and sponsored roaming (HLR/HSS), diameter routing and GTP, GRX3+ years experience with these protocols; Sigtran: MAP (Mobile Application Protocol), Sigtran: CAP (Camel 1-3), Diameter (Ro, Gx, Gy, Gn, Gi), REST API, BGPExcellent verbal and written communication skillsBonus PointsIREG Testing experience is preferredInternational working experience is ideal£59,600 - £85,600 a yearAt Airalo, we believe in roaming-free recruitment.

This role is remote and open to candidates across our supported locations in Europe. The range below reflects the full salary range for this role across the countries where it's available: UK: £59,600 – £85,600Ireland: €54,000 – €77,600Western/Northern Europe: €44,550 – €86,160Southern Europe: €37,600 – €85,200Central & Eastern Europe: €40,360 – €71,240South-Eastern Europe / Balkans: €39,200 – €73,000Your Home Destination: Local market rates and cost of living vary. 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: sincerely thank all applicants in advance for submitting their interest in this opportunity.

📌 IT Infrastructure Engineer (Projects) (Madrid)
🏢 Airalo
📍 Madrid