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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!
Job Responsibility:
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
Requirements:
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)
Comfortable navigating EF structures (ICCID, IMSI, PLMN) and analyzing TLS-secured profile downloads
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)
What we offer:
Health Insurance
work-from-anywhere stipend
annual wellness & learning credits
annual all-expenses-paid company retreat in a gorgeous destination & other benefits