Sim Expert (M/F)

At Transatel, we imagine innovative cellular connectivity solutions and deploy them around the world for prestigious clients like Airbus, Stellantis, Worldline and Jaguar Land Rover. As a leading Mobile Virtual Network Operators enabler and global IoT connectivity pioneers, our SIM & eSIM connect millions of consumers and industrial devices and vehicles.

Our diverse organization gathers 250+ telecom and IT experts from 40 nationalities working together in our new Paris La Défense headquarter (France). We offer inspiring professional and personal growth opportunities for talents with all backgrounds and experience. If you are looking for an exciting career move and new challenges in a fast-growing business environment, welcome at Transatel! Join our team now, and become part of the extended NTT group, one of the largest and most innovative technology company in the world. With its global footprint and 330,000 employees worldwide, NTT has been pushing innovation forward for more than 150 years.

Your mission

Within the Research & Innovation team:

• Take full charge of the development of the SIM products
• Create and maintain product specifications, validate new SIM products, and ensure interoperability for new product introduction, timely launch and go-to-market activities
• Develop and maintain the relationships with the selected SIM manufacturers on a day-to-day basis
• Lead the definition and execution of new technology roadmap and trials (e.g. 5G SA and iSIM), including identifying and sourcing necessary test equipment and conducting relevant testing activities
• Handle all the internal and external queries about SIM products
• Communicate regularly across different functions with senior management and executives to ensure expected outcomes and objectives are met
• Work closely with the operational team, acting as SN3/SN4 for any SIM related topic.

Your profile

Bac+5/ BS or MS degree in Computer Science or Electrical Engineering (or equivalent)

Experience with M2M/IoT modules Experience with consumer cellular devices Experience with software development using Java, C and/or Python Experience working remotely in a multicultural environment Experience working in a tech start-up like environment

Key Requirements

• Experience in Wireless Telecom, including activations and provisioning with demonstrated understanding of device and SIM interactions and SIM card’s role in Network access and usage
• Experience in SIM technology & product roll-out and device management, including product configuration, feature and offering integration, new product introduction, and full lifecycle management
• Knowledge of testing and certification of UICC/SIM/eSIM/eUICC
• Understanding of SIMs and device specifications in industry forums (e.g. 3GPP, ETSI, GSMA)
• Experience providing an in-depth business and technical expertise on new SIM architectures, key management, and cryptographic function
• Experience in SIM secure element and SIM card applet development
• In depth knowledge of authentication algorithms (e.g. Milenage), processes, and mechanisms
• In depth knowledge of essential algorithms (e.g. 3DES, AES, RSA, ECC etc)
• Proven experience of Key Ceremony
• Proven experience of BAP/BAT process
• Ability to debug APDU logs
• Understanding of 2G/3G/4G/5G network architecture, network service provisioning, Over the Air (SCP02, 80 and 81), Remote SIM Provisioning (RSP), and 3GPP protocols
• In depth knowledge of industry standards: 3GPP 31.111, 31.102, ISO 7816, ETSI 102 221, 102 223, 102 671, GSMA SGP 02, 22 etc.
• Fluency in English with excellent verbal and written communications skills
• Passion for working on new technologies in a fast-paced and frequently changing environment
• Ability to work effectively with cross-functional teams