SIM/eSIM Engineer I — Java Card & Connectivity

Cubic³; Dublin; Hybrid; EUR 50,000 - 70,000; Full time

Benefits offered by this job

Onsite during probation (5 days/week)

Remote work options up to 8 days/month

Job summary

Cubic³ is seeking a SIM Engineer Level I to join our SIM Engineering team in Ireland. You will contribute to building advanced connectivity solutions, managing SIM/eSIM card logistics and fulfilment, and providing technical support to global customers.

The role covers hands-on development with SIM/eSIM technologies, Java Card applet creation, and collaboration across mobile core networks and security teams. Onsite probation is followed by flexible remote options.

Qualifications

• 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.

Responsibilities

• 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.

Skills

SIM/eSIM tech

Java Card

Telecoms knowledge

Analytical skills

Communication

Education

Bachelor's degree in engineering or CS

Tools

Git

Postman

Smart card tools

Job description

Cubic³ is seeking a SIM Engineer Level I to join our SIM Engineering team in Ireland. You will contribute to building advanced connectivity solutions, managing SIM/eSIM card logistics and fulfilment, and providing technical support to global customers.

The role covers hands-on development with SIM/eSIM technologies, Java Card applet creation, and collaboration across mobile core networks and security teams. Onsite probation is followed by flexible remote options.