SIM/eSIM Engineer II — OTA, 5G & eUICC Expert

Cubic³; Madrid; Presencial; EUR 55.000 - 75.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Onsite during probation period

WFH up to 8 days/month after probation

Equal opportunities employer

Descripción de la vacante

Cubic³ is seeking an energetic SIM Engineer II to join our SIM Engineering team. You will design, develop, and support SIM/eSIM products and provisioning solutions for a global customer base across automotive, IoT and mobility sectors.

Join a challenging, flexible environment with opportunities to work on 5G, GSMA specs, and secure element technologies. You will collaborate with cross-functional teams and contribute to end-to-end SIM provisioning projects.

Formación

• Third level qualification in a technology discipline such as Engineering, Computer Science, or similar.
• 3–6 years’ experience in a tech organization, preferably telecoms, with up to 3 years in SIM/eSIM/OTA R&D.
• Experience with Remote SIM Provisioning technologies (GSMA SGP.02, SGP.22/SGP.32).
• Knowledge of SIM/eSIM architecture and protocols (APDU, ISO 7816).
• Familiarity with 3GPP/ETSI standards relevant to SIMs (e.g., TS 31.102, TS 102.221).
• Experience with smart card test & trace tools (Comprion).
• Understanding of secure coding practices and cryptographic protocols.
• Proficiency with version control systems (Git) and development tools.
• Knowledge of SIM operating systems for secure elements (MULTOS).
• Experience working with MNOs or handset OEMs and familiarity with mobile network elements (HSS, OTA platforms).
• Experience/knowledge of Postman API, Java, C#, SQL, scripting.
• Experience with monitoring and alerting tools (DataDog, Zabbix).
• Proactive and open-minded with analytical and problem‑solving skills.

Responsabilidades

• Support the design, validation, and maintenance of electrical profiles for SIM and eSIM products.
• Design and implement Java Card applets for SIM/eSIM services, working to 3GPP, ETSI, and GSMA standards.
• Write and maintain technical documentation (e.g. applet specification, electrical profile specifications, APIs, test plans).
• Collaborate with cross-functional teams (mobile core network, security, IoT device vendors, smart card (eUICC) vendors).
• Develop, test, and support SIM-based applications and tools supporting SIM applications and their integration within the SIM/eSIM ecosystem.
• Contribute to peer review of electrical test data and reports, supporting the technical growth of team members.

Conocimientos

Java

APDU protocols

Git

C#

SQL

Cryptography

Communication

Educación

Bachelor's in Electronic Engineering

Herramientas

Postman API

Comprion

Git

Java Card IDE

Descripción del empleo

Cubic³ is seeking an energetic SIM Engineer II to join our SIM Engineering team. You will design, develop, and support SIM/eSIM products and provisioning solutions for a global customer base across automotive, IoT and mobility sectors.

Join a challenging, flexible environment with opportunities to work on 5G, GSMA specs, and secure element technologies. You will collaborate with cross-functional teams and contribute to end-to-end SIM provisioning projects.