Mobile Developer Engineer

• Design, develop, and maintain native mobile SDKs/libraries (Kotlin, Swift).
• Design, develop, and maintain native mobile applications to showcase these SDKs.
• Participate in code reviews, pair programming, and contribute to TDD and E2E testing.
• Work with hardware features such as secure elements and NFC.
• Integrate with RESTful APIs and collaborate with backend teams.
• Set up and master CI/CD tools, participate in secure code reviews, and contribute to
• documentation.
• 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.
• Willingness to assist across both platforms if needed. Experience with mobile development tooling (IDEs, test frameworks, emulators).

Nice-to-Haves:

• Cross-platform experience (Flutter preferred).
• Familiarity with hardware features (NFC, BLE), developing mobile libraries, or native code integration.
• Understanding of Docker, Figma-based UI implementation, Rust, smart cards, secure elements, or byte-level debugging of binary protocols., * Configure your development environment (IDEs, emulators, libraries, CI tools).
• Run local builds for iOS, Android, and backend.
• Review key security policies and study product user flows, architecture diagrams, API specs.
• Shadow senior developers and join product demos.

Days 31-60: Deepening Skills & First Contributions

• Participate in workshops on secure coding and best practices (OWASP Mobile top risks).
• Write code using TDD for small features and bugfixes.
• Engage in pair programming with a mentor focused on security and test cases.
• Get hands-on with E2E tests, CI/CD mastery, and contribute.
• Take ownership of a real ticket and participate in a security code review.
• Document your features or tests.

Days 61-90: Autonomous & Secure Contribution

• 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.
• Lead a security retrospective or sharing session.
• 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.

• Culture and diversity: Join a people-oriented environment with different nationalities and a great team spirit, flat hierarchies (everyone speaks to everyone). Equal Opportunity Employer and LGBT+ friendly.
• Team: An opportunity to shape our engineering culture and work with a passionate, mission-driven team. Collaboration with a diverse and very international team of outstanding people.
• 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.
• Career Development: Benefit from continuous training, coaching, and talent development programs.
• Social Benefits: Flexible compensation (transport tickets, training, private insurance), etc.
• Own canteen: Take a break with our breakfast and lunch service: choose between a wide range of menus, salad desk, and sandwiches service. Nicely priced!
• Work-Life Balance: 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).
• Location: El Prat de Llobregat. Easy communication by private transport or public transport: Bus 88, 110, PR4 and Metro L10S (ZAL/Riu Vell).

G+D hace más segura la vida de miles de millones de personas en todo el mundo. Creamos confianza en la era digital con tecnología de seguridad integrada en tres segmentos: Seguridad Digital, Plataformas Financieras y Tecnología Monetaria. Hemos sido un socio confiable para nuestros clientes durante más de 170 años con nuestras soluciones innovadoras para SecurityTech! Somos un grupo tecnológico internacional y una empresa familiar tradicional con más de 14,000 empleados en 40 países. Crear Confianza es nuestro camino hacia el éxito. La confianza es la base de nuestra colaboración en G+D. Somos el socio confiable para todos los desafíos resultantes del Internet de las cosas. Ofrecemos un completo portafolio de conectividad para operadores de redes móviles, fabricantes de automóviles, empresas tecnológicas como fabricantes de chips y módulos, así como proveedores de transporte y logística. Nuestro portafolio incluye soluciones altamente seguras en el área de conectividad e IoT, desde SIM clásicas, eSIM e iSIM, hasta los sistemas operativos integrados asociados y el manejo del ciclo de vida, pasando por servicios de conectividad global y soluciones IoT. ¿Quieres dar forma activamente a la transformación digital con nosotros?, Somos una empresa comprometida con la igualdad de oportunidades. Fomentamos la diversidad en todas sus formas y cultivamos un entorno de trabajo inclusivo, libre de prejuicios, discriminación y acoso, donde todas las personas empleadas se sientan valoradas y parte de la comunidad. Damos la bienvenida a todas las candidaturas, independientemente de su sexo, edad, raza, origen étnico, procedencia social y cultural, religión, discapacidad u orientación sexual.