Mobile Developer Engineer

November 4, 2026

Remote

Middle

CT, Spain

Indeed

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Portfolio required

Description

The company builds secure, high-quality mobile SDKs and applications for Android (Kotlin) and iOS (Swift) within an international security technology group. The role covers end-to-end development with a strong emphasis on security, code quality, TDD and collaboration with backend and cross-functional teams. The team works in Scrum on connectivity, IoT and digital currency projects and follows a structured 90-day onboarding plan.

Responsibilities

Design, develop and maintain native mobile SDKs and libraries in Kotlin and Swift
Design, develop and maintain native mobile applications that showcase these SDKs
Participate in code reviews, pair programming, 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 while maintaining security and compliance
Troubleshoot and optimize the CI/CD pipeline for quality and speed
Mentor newcomers on secure coding basics and help refine Scrum processes

Requirements

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)
Cross-platform experience, with Flutter preferred
Familiarity with hardware features (NFC, BLE) and native code integration
Understanding of Docker, Figma-based UI implementation, Rust, smart cards or secure elements
Ability to write secure, test-driven code
Comfort with mentoring colleagues and exploring new tools in a fast-paced environment