Mobile Developer Engineer

Mobile SDK Engineer (Android)

Barcelona (Sant Joan Despí) | Hybrid (3 days remote)

We're looking for a Mobile SDK Engineer to build and maintain secure mobile SDKs for Android (Kotlin).

This is not a traditional mobile app development role focused on UI. You'll work on reusable SDKs that integrate with backend services and device-level capabilities such as NFC, BLE, and secure elements, requiring strong software engineering, security, and system design skills.

What you'll do

• Design, develop, and maintain native mobile SDKs (Kotlin)
• Build sample/demo applications to validate SDK functionality
• Integrate mobile solutions with backend services (primarily Golang)
• Work with NFC, BLE, secure elements, and other device-level capabilities
• Contribute to code reviews, TDD, E2E testing, and CI/CD improvements