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Madrid, Comunidad de Madrid, España
Hybrid
The Company
Cubic³ provides advanced software-defined vehicle solutions to over 200 countries around the world. Our powerfully smart connectivity enables leading automotive, agriculture, and transportation OEMs to deliver innovative new services and fully compliant in-vehicle experiences that customers desire, regardless of local market requirements.
We believe in leadership that supports empowerment and responsibility, while recognising and developing leadership qualities across Our Team. Together we bring out the best in each other. So, whether you’re interested in joining us as an individual contributor, manager, senior leader – or someone who aspires to growing into a leadership role – we look for people who are results focused, empathetic, visionary, empowering, and who ‘champion’ our cultures and values.
We are looking for a SIM Engineer Level I with hands-on experience in SIM and eSIM technologies. You will join a dynamic SIM Engineering team and play a key role in delivering Cubic³ solutions within the evolving SIM/eSIM Remote SIM Provisioning technology domain.
The SIM Engineer Level I will contribute to building advanced connectivity solutions, managing SIM/eSIM card logistics and fulfilment, and providing technical support to our global customers. You will work directly with the latest developments in eSIM and emerging connectivity standards.
Design, validate, and maintain electrical and logical profiles for SIM and eSIM products
Develop and implement Java Card applets for SIM/eSIM services, ensuring compliance with 3GPP, ETSI, and GSMA standards
Create and update technical documentation (e.g., applet specifications, test plans)
Collaborate with cross-functional teams spanning mobile core networks, security, and device vendors
Support the development, testing, and integration of SIM-based applications and tools
Utilize smart card test and trace tools to ensure quality and performance
Participate in technical reviews, troubleshooting, and team meetings
Involvement in end-to-end SIM/eSIM ordering and provisioning processes
Opportunities to work with advanced IoT and connectivity technologies
Professional growth and skills development in a collaborative environment
The ability to drive ideas and technical initiatives within a highly skilled team
Bachelor’s degree in engineering, computer science, or a related discipline
3+ years of relevant experience in telecoms technology, connectivity, or related sectors
Proven experience with SIM/eSIM technologies and protocols (APDU, ISO 7816)
Knowledge of 3GPP, ETSI, and GSMA standards
Experience with Java, Java Card, or scripting languages
Familiarity with mobile network elements and smart card technologies
Strong analytical and problem-solving skills; quality-focused and self-motivated
Effective written and verbal communication skills
Experience with Git, Postman, or smart card test tools (e.g., Comprion)
Exposure to Kanban/Agile methodologies
New hires at Cubic³ are required to work onsite five days a week during their six-month probation period to get to know the company, their team, and our ways of working. After probation, we offer a flexible arrangement of up to eight work-from-home days per month, provided it aligns with business needs and performance standards. This arrangement is not a given for all roles.
Cubic³ is an equal opportunities employer and committed to fostering a diverse and inclusive workplace.
