We shape trust in the digital age with built-in security tech in three segments: Digital Security, Financial Platforms and Currency Technology. We are an international technology group and traditional family business with over 14,000 employees in 40 countries. We are the reliable partner for all challenges resulting from the Internet of Things. We offer a complete connectivity portfolio for mobile network operators, automotive manufacturers, technology companies such as chip and module manufacturers as well as transport and logistics providers. Our portfolio includes highly secure solutions in the area of connectivity & IoT, from classic SIM, eSIM and iSIM, to the associated embedded operating systems and life cycle management, through to services for global connectivity and IoT solutions. Do you want to actively shape the digital transformation with us?
We are looking for a Mobile Developer Engineer to join our team in Barcelona. In this role, you will be responsible for the end-to-end development of secure, high-quality mobile SDKs and applications for Android (Kotlin) and/or iOS (Swift), with opportunities to contribute across both platforms.
The role emphasizes security, code quality, testing best practices, and collaboration.
Design, develop, and maintain native mobile SDKs/libraries (Kotlin, Swift).
Todas las habilidades, cualificaciones y experiencia relevantes que necesitará un candidato seleccionado se enumeran en la siguiente descripción.
Participate in code reviews, pair programming, and contribute to TDD and E2E testing.
Integrate with RESTful APIs and collaborate with backend teams.
Follow Scrum project workflows and engage in daily standups.
Deliver features from ideation to deployment, maintaining security and compliance.
Troubleshoot and optimize the CI/CD pipeline for quality and speed.
Proficient in native Android (Kotlin) and/or iOS (Swift) development.
Experience with mobile development tooling (IDEs, test frameworks, emulators).
Cross-platform experience (Flutter preferred).
Understanding of Docker, Figma-based UI implementation, Rust, smart cards, secure elements, or byte-level debugging of binary protocols.
You write secure, test-driven code, enjoy collaborating with teammates, mentor others, and are comfortable exploring new tools and technologies in a fast-paced mobile environment.
Run local builds for iOS, Android, and backend.
Shadow senior developers and join product demos.
Participate in workshops on secure coding and best practices (OWASP Mobile top risks).
Engage in pair programming with a mentor focused on security and test cases.
Get hands-on with E2E tests, CI/CD mastery, and contribute.
Document your features or tests.
Own delivery of a feature end-to-end (from coding, TDD, peer review, E2E, to deployment).
Fix a medium-level security issue in the codebase and propose new tests.
Optimize part of the CI/CD workflow (caching, deployment automation, test speed).
Mentor newcomers on secure coding basics.
Help refine Scrum processes and share lessons learned through onboarding documentation.
Team: An opportunity to shape our engineering culture and work with a passionate, mission-driven team. Global Collaboration: Work collaboratively with stakeholders around the globe.
Impactful Work: You will have the opportunity to participate in and shape a global lighthouse project in the domain of digital currencies.
Benefit from continuous training, coaching, and talent development programs.
Social Benefits: Flexible compensation (transport tickets, training, private insurance), etc.
Flexible working hours with the option for remote work (Mon–Thu 8:30 – 17:30 and Fri 8:30 – 15:30;
3 days of remote work).xhfqzwm
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