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Dennis GillDG

Dennis Gill

Senior Android & Kotlin Multiplatform Developer

€680/day
Karlsruhe, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Dennis

I am an experienced Android developer with a focus on modern Kotlin-based solutions – from Jetpack Compose to Kotlin Multiplatform. For over 10 years, I have been developing robust, scalable apps and enjoy working on new features as well as maintaining and further developing existing codebases. I love clean code, good API design, and well-thought-out architecture. At the same time, I am a team player who enjoys sharing knowledge, supporting juniors, and ensuring quality through clear code reviews. Technically proficient, communicative, and hands-on – that's how I prefer to work.
  • German

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Exxeta AG
    Senior Consultant
    SOFTWARE PUBLISHING
    July 2024 - Today (1 year and 11 months)
    Karlsruhe, Germany
    As a Senior Android Developer, I work on the My Porsche App, the digital companion for Porsche drivers worldwide. The app enables a seamless connection between driver and vehicle – with functions such as remote control, real-time vehicle information, charging status display, and mobility services.

    I work daily with:
    • Modern Android stack: Jetpack Compose, Kotlin Coroutines, Architecture Components
    • Modular, scalable codebases optimized for international rollout
    • Agile enterprise environments with CI/CD pipelines, code reviews, and close collaboration with UX, QA, and backend teams

    In addition to technical implementation, I also take responsibility for code quality, performance optimization, and mentoring developers – for a stable and future-proof app with millions of users worldwide.
    Android Jetpack Kotlin Coroutines Jetpack Compose Unidirectional Data Flow
  • fluidmobile GmbH
    Senior & Lead Mobile Developer Android
    SOFTWARE PUBLISHING
    November 2013 - June 2024 (10 years and 7 months)
    In my previous role, I worked as a Lead Android Developer for over a decade, helping to shape the development of modern, scalable Android applications from the ground up – in both medical and non-medical fields (B2B & B2C).

    My responsibilities included:
    • Building and leading an Android development team
    • Conception and implementation of a sustainable architecture for complex Android apps
    • Responsibility for operation and further development of existing applications in production environments
    • Planning, development, and maintenance of multiple Android apps – from MVP to long-term maintenance
    • Agile, interdisciplinary collaboration with iOS, design, and backend teams
    • Transformation to cross-platform development withKotlin Multiplatform (KMP)
    • Implementation of an event sourcing approach for robust, data-driven offline-first apps
    • Architecture documentation and interface design to ensure long-term maintainability

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Education

  • Master of Science
    Karlsruhe Institute of Technology
    2015
    Informatik

Skill set

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