Core Network Engineer

Remote; San Francisco (CA); Remote; USD 120,000 - 180,000; Full time

Job summary

Airalo, the world's first eSIM store, seeks a telecom core network engineer to design the IP infrastructure of multi-site data centers and enable global connectivity for travelers. This fully remote role defines WAN/LAN strategies, leads configurations of DRAs, GTPs, GGSN/PGW, and coordinates direct roaming agreements with partners, interfacing with Airalo's Platform and Network Operations teams.

Ideal candidates have 3–5 years in core telecom, experience with Sigtran, Diameter, REST APIs, BGP,

Qualifications

• Bachelor's or higher in Engineering, Telecommunications, or equivalent experience.
• 3+ years in telecom core networks.
• Experience with GGSN/PGW, HLR/HSS and roaming.
• Strong communication in English (written and verbal).

Responsibilities

• Design IP infrastructure across multi-site data centers.
• Define WAN/LAN network strategy and configurations.
• Lead DRAs, GTPs, GGSN/PGW, SBCs, firewalls, and routers.
• Coordinate direct and sponsored roaming agreements.
• Interface between Core Network, Platform, and Network Operations teams.
• Support deployments, performance improvements, and trainings.

Skills

Core network design

GGSN/PGW/DPI

Roaming (HLR/HSS)

Diameter routing & GTP

BGP & REST API

Education

Technical Degree in Engineering or Telecommunications

Job description

Defining the future of work & living globally

At 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.

Today, we're a team of 400+ people across 60+ countries, building a product used by travelers every day. We've grown quickly, but we've worked hard to keep what matters: trust, ownership, and the freedom for people to do great work without unnecessary layers or bureaucracy.

We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.

Languages: English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async.

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 you 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.