Your Role
We are looking for an experienced and hands-on SIM/eUICC Expert / Solution Engineer to support the implementation, testing, and go-to-market of new eSIM products for both Consumer and IoT use cases, in alignment with GSMA SGP.22 and SGP.32 standards.
This is a freelance role (daily/hourly contract) with a minimum duration of 6 months and the possibility to work remotely, but with regular travel when required.
Your Impact
- Design and test the new fully compliant SGP.32 IoT eUICC product (multi-form factor, multi-grade).
- Design and test new Consumer and IoT eSIM profiles products, relying on emnify eIM and SMDP+ platforms (SGP.22 and SGP.32).
- Coordinate with SIM vendors to define technical specifications, provisioning requirements, and delivery schedules.
- Support development and testing of a Multi-IMSI STK Java Card Applet for eSIM and eUICC and ensure full interoperability across different vendor platforms.
- Drive the acceptance testing and production rollout of the eSIM and SIM products.
- Design, maintain and execute test suites (live and scripted command-based) for SIM/eSIM functionality, device compatibility and OTA behaviors.
- Troubleshoot complex SIM/device/network issues and provide technical root cause analysis and fixes.
- Participate in project tracking, documentation and milestone delivery from development through go-to-market.
- Produce technical and commercial collaterals to support internal stakeholders and external customers (e.g. Product briefs, API docs, support materials, pricing sheets, internal announcements).
Your Skills
- Proven experience in SIM/eSIM product engineering, testing, or technical consulting.
- Strong expertise with SGP.02, SGP.22, SGP.32, SIM file structure design, OTA operations (HTTP, SMS), and GSMA testing standards.
- Hands-on experience with SIM vendors and mobile operators worldwide.
- Familiarity with mobile core elements (HLR/HSS/AUC) and connectivity management platforms.
- Experience designing OTA campaigns and working with SMDP/SMDP+/SMSR/eIM platforms and APIs.
- Ability to debug and analyze SIM/device/network issues using industry tools.
- Fluent in English; excellent communication and documentation skills.
- Self-motivated and capable of managing technical deliverables and priorities independently.
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What We Do
emnify is the leading cloud building block for cellular communications in the IoT stack, connecting millions of IoT devices globally – from electric vehicles to energy meters, alarm systems to GPS trackers, thermometers to health wearables. The emnify API and SIM technology connect and secure any kind of IoT deployment to its application back-end. emnify’s cloud-native integrations and no-code workflows ensure seamless lifecycle scalability for deployments of all sizes – from local start-up to global enterprise. The emnify IoT SuperNetwork is the largest globally distributed mobile cloud core network of its kind, supporting local network access (2G – 5G, LTE-M, NB-IoT) in over 180 countries from more than 25 cloud regions – and counting. emnify’s solution is built on partnerships with the leading hyperscaler cloud service providers, system integrators and hundreds of radio network operators worldwide. Founded in 2014, emnify was the first to transform cellular IoT connectivity into an easy-to-consume cloud resource – trusted today by thousands of the world’s most innovative companies. To learn more about emnify, please visit www.emnify.com
