Kotlin/Java Android Developer with German

🔍 Android Native Developer (German-speaking)

Location: 100% remote from within the EU

Contract type: B2B

💡 About the company

Kyotu Technology is a boutique software house based in Wrocław and Warsaw, Poland. We partner with clients from Germany, Switzerland, Western Europe, the US, and the Middle East, developing complex, high-impact systems — including those used in finance, identity verification, and cybersecurity.

🚀 About the project

We’re building secure digital identity and authorization systems for a German public sector project. The goal is to create modern, secure, and user-friendly Android applications that handle sensitive user data and implement advanced authentication protocols.This is a long-term engagement (2–3 years, with likely extension) in a regulated environment with a strong focus on privacy, cryptography, and compliance.

🧠 Your responsibilities

• Design and develop native Android applications using Kotlin or Java

• Implement authentication and authorization functionality

• Develop secure storage and communication modules (e.g. BLE, NFC)

• Integrate biometric authentication and secure hardware features

• Collaborate closely with UX/UI teams to deliver accessible, intuitive interfaces

• Implement testing processes (unit, UI, integration testing)

• Participate in code reviews and apply security best practices

• Contribute to continuous improvement of the development process

🧩 Requirements

• Minimum 3 years of experience in native Android development (Kotlin or Java)

• Proficiency with Android Studio, Gradle, and ADB

• At least 1 year of experience with Material Design and Jetpack Compose

• Solid knowledge of native Android APIs, including:

  • TEE/StrongBox (secure key storage)

  • BLE (Bluetooth Low Energy)

  • NFC communication

  • OMAPI (Open Mobile API)

  • BiometricPrompt

• Experience with testing tools (Espresso, Appium)

• Understanding of cryptography and secure communication standards

• Familiarity with Git-based development workflows

• Proficiency in both German and English (min. B2 level)

✨ Nice to have

• Experience with UI design tools (e.g. Figma)

• Familiarity with identity protocols (OAuth2, OpenID Connect, SAML)

• Knowledge of FIDO standards and verifiable credentials

• Experience with JWT and digital identity frameworks

• Understanding of eIDAS regulations and compliance requirements

• Previous experience publishing apps to Google Play

📦 What we offer

• 100% remote work within the EU (occasional visits to Germany)

• Long-term public sector project (2–3 years, strong potential for extension)

• Collaborative international team: backend, UX/UI, QA, DevSecOps

• Focus on high-impact, security-driven development

🗂️ Note

We are currently building a talent pool for upcoming projects.If you’re interested in joining Kyotu as an Android Native Developer, send us your CV — we’ll contact you when a matching project becomes available.