Description
eSIM & Device Engineer - Core Networks
Team: Technologies
Location: United Kingdom, Spain
Commitment: Full-Time
Workplace Type: remote
About Airalo
Alo! Airalo is the world’s first eSIM store that helps people connect in over 200+ countries and regions across the globe. We are building the next digital service that revolutionizes the telecom industry. We are a travel-tech company and an equal-opportunity environment that values and executes diversity, inclusion, and equity. Our team is spread across 50+ countries and six continents. What glues us together is our commitment to changing the way you connect.
Check out more information about Airalo in our Public Handbook: https://airalo-public.notion.site/airalo-public-handbook
About you
We hope that you care deeply about the quality of your work, the intrinsic worth of tasks, and the success of your team. You are self-disciplined and do not require micromanagement in terms of your skillset and work ethic. You do your best to flourish as an individual every day while working hard to foster a collaborative team environment. You believe in the importance of being — and staying — authentic, honest, positive, and kind. You are a good interlocutor with clear and concise communication. You are able to manage multiple projects, have an analytical mind, pay keen attention to detail, and love to get your hands dirty. You are cognizant, tolerant, and welcoming of vulnerabilities and cultural differences.
About the Role
Position: Full-time / Employee
Location: Remote-first
Benefits: Health Insurance, work-from-anywhere stipend, annual wellness & learning credits, annual all-expenses-paid company retreat in a gorgeous destination & other benefits
The eSIM & Device Engineer will join our Core Networks Engineering team. They will be a dedicated specialist focused on Device setting management, driving our mission toward global connectivity!
Your main responsibilities will be:
- Design and validate eSIM Electrical Profiles (MVNO/Roaming) following GSMA SGP.22 standards.
- Rigorously test the Local Profile Assistant (LPA) behavior on the latest flagships (iPhone 16, Samsung S24, Pixel 9) to ensure flawless Remote SIM Provisioning.
- Plan and execute Over-the-Air (OTA) campaigns to update eUICC file systems and steering logic for devices already deployed globally.
- Use tools like COMPRION or UL SIMtester to analyze APDU logs and debug communication failures in Remote File Management (RFM).
- Verify Steering of Roaming (SoR) logic on global testbeds, ensuring our users always land on the fastest partner network.
- Minimize profile sizes to guarantee fast downloads over 3G, 4G, and 5G network conditions.
Must Haves:
- 3+ years in mobile device configuration, OTA testing, and managing carrier settings (VoLTE, VoWiFi, APNs).
- Deep knowledge of Apple Carrier Bundles and Android network settings (GSMA NSX).
- You are comfortable navigating EF structures (ICCID, IMSI, PLMN) and analyzing TLS-secured profile downloads.
- You likely have experience working at a Tier 1 Carrier, an MVNO, or a top-tier eSIM vendor (G+D, Thales, IDEMIA).
- Familiarity with Subscription Management orchestration and a "problem-solver" mindset for niche global hardware.
- Fluent English is essential for collaborating across our 50+ country remote team.
Nice to Have:
- Remote testing (e.g. Segron, Mobilium) experience
- Experience with OTA systems e.g. Thales
- Knowledge of mobile network call flows (signalling) for 4G and 5G
- Scripting languages (e.g. python)
If you are interested in this position, please apply via the link.
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: https://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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