SIM/eSIM Engineer I - Java Card & Connectivity

Doist; Dublin; On-site; EUR 45,000 - 65,000; Full time

Job summary

Cubic³ is seeking a SIM Engineer Level I to join our SIM Engineering team and contribute to SIM/eSIM products and provisioning. You will work on designing, validating, and maintaining both electrical and logical profiles, and help deliver solutions across global customers.

The role requires hands-on experience with SIM/eSIM technologies, Java Card, and related standards, with opportunities to collaborate with cross-functional teams in a dynamic, global environment.

Qualifications

• Bachelor’s degree in engineering, computer science, or a related discipline.
• 3+ years of 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.

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

APDU

3GPP

ETSI

GSMA

Java

Scripting

Smart cards

Communication

Education

Bachelor’s degree in engineering, computer science, or related

Tools

Git

Postman

Comprion

Job description

Cubic³ is seeking a SIM Engineer Level I to join our SIM Engineering team and contribute to SIM/eSIM products and provisioning. You will work on designing, validating, and maintaining both electrical and logical profiles, and help deliver solutions across global customers.

The role requires hands-on experience with SIM/eSIM technologies, Java Card, and related standards, with opportunities to collaborate with cross-functional teams in a dynamic, global environment.