SIM Engineer I

Cubic³

SIM Engineer I developing connectivity solutions for Cubic³. Involvement with SIM/eSIM technologies and compliance with international standards.

Posted 7/23/2026full-timeMadrid • 🇪🇸 SpainMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in developing and implementing Java Card applets for SIM/eSIM services while ensuring compliance with 3GPP, ETSI, and GSMA standards. Proficient in collaborating with cross-functional teams and utilizing smart card test tools to maintain high-quality performance.

Highest-signal resume keywords

Java Card DevelopmentSIM/eSIM Technologies3GPP Standards ComplianceTechnical Documentation CreationAnalytical Problem-Solving

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

JavaJava CardScripting LanguagesAPDU ProtocolISO 7816 Protocol

Soft Skills

Analytical SkillsProblem-SolvingEffective Communication

Tools & Technologies

Smart Card Test ToolsMobile Core Networks

Industry Keywords

Telecom TechnologyConnectivityETSI StandardsGSMA Standards

Tech Stack

Tools & technologies

Java

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Benefits

Comp & perks

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