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.

Key Responsibilities 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.

Must-Have Qualifications 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.

Idóneo Candidate 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.

What will you do on your first 90 days Days 0-30: Orientation 3 days of remote work).

Location : Sant Joan Despí.

Easily accessible by public transport.

📌 Remote Mobile App Developer (Flutter) (Barcelona)
🏢 Giesecke+Devrient
📍 Barcelona