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Christian Bunk

Berlin, Germany
[email protected], linkedin.com/in/christianbunk, github.com/christianb

I am a proactive and insightful team player, dedicated to fostering collaboration, asking thoughtful questions, and driving meaningful discussions to uncover risks and deliver better outcomes. I consistently strive for high-quality results by combining technical expertise with a strong commitment to continuous improvement and innovation. Beyond my core responsibilities, I take the initiative to mentor teammates, enhance workflows, and contribute to building a culture of growth and excellence.

Experience

Senior Android Engineer @ Nord Security (2022 - Present)

NordSecurity shapes a more trusted and peaceful online future for people everywhere.

  • Enhance team productivity and cohesion by improving processes, communication and workflows.
  • Create an inspiring work environment by embracing challenges, seeking solutions and supporting colleagues.
  • Enhanced app stability by increasing the number of unit tests by a factor of 15, along with additional UI and integration tests, resulting in less critical bugs, safer refactorings and improved overall application performance
  • Simplify App release flow by building a fully automated GitLab CI pipeline (incl a custom Android Docker Image)
  • Significantly decreasing app build time by extracting native C libraries into separate repositories and providing them as maven artifacts
  • Analyze and evaluating new technologies or potential security risks
  • Supporting PO by taking the lead in Scrum planning & backlog grooming
  • Sharing knowledge by mentoring Junior- and Mid-Level developers
  • Maintaining public SDKs (artifacts & documentation)
  • Migrating from RxJava to Coroutines and Flow
  • Integrating Lint and Detekt checks to ensure a clean and consistent codebase

Senior Android Developer @ Sensorberg (2019 - 2022)

Sensorberg develops hardware and software for the digitization from access to building control systems in the fields: Co-working spaces, commercial, residential real estate and self storage.

  • Development and maintainance of whitelabel Sensorberg Android App, SDK and Libraries
  • Implement Access Controll via QR-Code, NFC, Bluetooth and IP
  • Increasing Testability by applying Clean Code. Writing Unit and UI tests. Define scenarios for manual testing.
  • Integration of third party libraries into Sensorberg SDK
  • Working closely with Product, Design, UX, Delivery, Backend-Developers within a SCRUM environment
  • Develop and maintain GitLab CI pipeline
  • Research project for multiplatform support (Flutter vs. KMP)

Senior Android Developer @ Zattoo (2016 - 2019)

Zattoo is a TV platform for IP-based transmission of television channels and video on demand content to a variety of devices.

  • Develop the whitelabel Zattoo App available for Mobile, AndroidTV and FireTV
  • Increase testability using MVP and Dagger2
  • Integrate RxJava and Room for reactive data observation

Junior/Mid Android Developer @ Zalando (2013 - 2016)

Zalando is a leading European online platform for fashion and lifestyle.

  • Developed and published the very first Zalando Shopping Android App 1.0
  • Developed the Zalon Android App + Backend API (Java / Spring)
  • Migrate from custom HTTP implementation to Retrofit
  • Separating App in layers and applying Clean Architecture

Programming Languages

  • Primary (daily use): Kotlin
  • Familiar (used occasionally or in the past): Java, Python, C/C++, Go, Dart, Haskel, Ruby

Technologies & Frameworks

  • Primary (daily use): Coroutines, Detekt, Espresso, Git, GitLab, Gson, Jetpack (Compose, DataStore, Kotlin Multiplatform, LiveData, Navigation, Room, ViewModel, WorkManager), Junit 4/5, Koin, Lint, Mockk, Retrofit2, Robolectric, Timber, Truth
  • Familiar (used occasionally or in the past): Biometrics, Bugsnag, CashApp Turbine, Dagger 2, Docker, Flutter, IKEv2, KSP, Leak Canary, MQTT, OpenVPN, RecyclerView, RootBeer, UI Automator, Unidirectional Data Flow, WireGuard

Education

  • M.Sc. Applied Computer Science, University of Applied Sciences Berlin, Germany (2010 - 2012)
  • B.Sc. Applied Computer Science, University of Applied Sciences Berlin, Germany (2007 - 2010)