freiberufler Senior Software Developer (Android, Kotlin, Ktor) auf freelance.de

Senior Software Developer (Android, Kotlin, Ktor)

zuletzt online vor wenigen Tagen
  • auf Anfrage
  • Bad Bramstedt
  • DACH-Region
  • de  |  en
  • 15.03.2024

Kurzvorstellung

I'm a Senior (Android) software developer with ten years of experience building high quality native apps (Kotlin, Java) as well as over two years of experience of working fully remote.

Auszug Referenzen (1)

"Freelancer in own company"
Android Developer (Freelancer)
Tobias Boehm
Tätigkeitszeitraum

1/2012 – 1/2017

Tätigkeitsbeschreibung

Freelancing as an Android developer working with Random House GmbH as well as in-house apps for Siemens and other start-ups.

Eingesetzte Qualifikationen

Android Entwicklung, Java (allg.), Mobile Entwicklung (allg.), CSS (Cascading Style Sheet), HTML

Qualifikationen

  • Android
  • Android Entwicklung
  • Back-End Entwicklung
  • Dependency Injection
  • Git
  • Google Cloud
  • GraphQL
  • Jetpack Compose
  • Jira
  • JUnit
  • Kotlin
  • Material Design
  • Mobile Entwicklung (allg.)
  • Reactive Programming
  • SCRUM

Projekt‐ & Berufserfahrung

Senior Android Developer
Congstar, Köln
9/2023 – 1/2024 (5 Monate)
Telekommunikation
Tätigkeitszeitraum

9/2023 – 1/2024

Tätigkeitsbeschreibung

Together with the team of Congstar I helped to modularize the main app and introduce code quality controls (think clean architecture and modularization by functionality + ktlint and detekt). All new UI components were implemented with Compose.

Tools and Skills: Kotlin, Dependency Injection, Coroutines, MVI, Retrofit/okhttp, GitLab, AndroidX, Mockk, Espresso, Jetpack Compose, detekt, ktlint, Scrum / Kanban, Confluence, Jira, MS Teams

Eingesetzte Qualifikationen

Android, Java (allg.), Kotlin

Mobile- & Backend Developer of MNDXT
MNDXT, Bad Bramstedt
5/2023 – offen (1 Jahr)
IT & Entwicklung
Tätigkeitszeitraum

5/2023 – offen

Tätigkeitsbeschreibung

I design and develop both Android and backend application for AI content generation app “Mind Extension” -Hyperlink entfernt- using latest Android technologies (Kotlin, Coroutines, Compose, Dagger Hilt DI, MVI, Mockk) and Google Cloud Platform + GitLab CI infrastructure for my backend (Cloud Run, Docker, Ktor, Koin DI, Detekt, Mockk)

As part of this project, I integrated services such as Google InApp Billing, Cloudinary CDN, OpenAI GPT, StabilityAi Stable Diffusion and Firebase SSO and Storage.

Eingesetzte Qualifikationen

Android, Back-End Entwicklung, Google Cloud, Kotlin, Mobile Entwicklung (allg.)

Senior Android Developer
RTL Group, Remote
2/2022 – 7/2023 (1 Jahr, 6 Monate)
Medienbranche
Tätigkeitszeitraum

2/2022 – 7/2023

Tätigkeitsbeschreibung

With a team of over 250 people (>40 Android devs on one codebase) I'm working on their next generation media streaming solution for RTL. My team is responsible for creating the podcast section of the app. Highlights: Working with a very large team utilising the SAFe framework in a highly modularised project.

Tools and Skills: Kotlin, Dagger/Hilt Dependency Injection, Coroutines, MVVM, Retrofit/okhttp, GitLab, AndroidX, Mockito, Scrum & SAFe, Confluence, Jira, MS Teams, Jetpack Compose

Eingesetzte Qualifikationen

Android, Git, GraphQL, Jira, Kotlin, SCRUM

Senior Android Developer
Immowelt Hamburg GmbH, Remote, Hamburg
2/2021 – 1/2022 (1 Jahr)
IT & Entwicklung
Tätigkeitszeitraum

2/2021 – 1/2022

Tätigkeitsbeschreibung

Together with the existing Android team I have further developed the Immowelt Search App. Highlight: Designing a polygon draw and erase feature prototype for creating search areas on Google Maps based on the JTS Topology Suite and the Android motion event system.

Eingesetzte Qualifikationen

Android, Design Thinking, Gradle, Jenkins, Jira, Kotlin, SCRUM

Senior Android Developer
AOK Systems, Berlin
9/2019 – 12/2020 (1 Jahr, 4 Monate)
Versicherungen
Tätigkeitszeitraum

9/2019 – 12/2020

Tätigkeitsbeschreibung

Begleitungs des Redesigns der AOK Bonus App. Konzeption und Einführung eines Multi-Modul fähigen Single-Activity Navigationssystems unter Verwendung von MVI, RXJava und Magnet DI.

Eingesetzte Qualifikationen

Functional reactive programming (FRP), Kotlin

(Senior) Android Developer (Festanstellung)
komoot, Potsdam, Berlin, Remote
11/2015 – 9/2019 (3 Jahre, 11 Monate)
Sport und Freizeit
Tätigkeitszeitraum

11/2015 – 9/2019

Tätigkeitsbeschreibung

Development of new features and maintenance for the leading outdoor planning navigation app in DACH - 3M downloads, up to 1M active users (depending on the season of the year).

Eingesetzte Qualifikationen

Android Entwicklung, Java (allg.), Kotlin

Android Developer (Festanstellung)
UnlockYourBrain GmbH, Berlin
4/2015 – 9/2015 (6 Monate)
Medienbranche
Tätigkeitszeitraum

4/2015 – 9/2015

Tätigkeitsbeschreibung

Development of Semper. Semper is a vocabulary trainer app featuring various languages as well as math quizzes using an unique approach by appearing in front of the lockscreen or before apps are started. On its peak the app had several 100k users per month.

Eingesetzte Qualifikationen

SQL, Android, Java (allg.), XML, JavaScript Object Notation (JSON), Representational State Transfer (REST)

Android Developer (Freelancer)
TEC HELP [...] [...], Berlin, Remote
1/2012 – 1/2017 (5 Jahre, 1 Monat)
High-Tech- und Elektroindustrie
Tätigkeitszeitraum

1/2012 – 1/2017

Tätigkeitsbeschreibung

Freelancing as an Android developer working with Random House GmbH as well as in-house apps for Siemens and other start-ups.

Eingesetzte Qualifikationen

Android Entwicklung, Java (allg.), Mobile Entwicklung (allg.), CSS (Cascading Style Sheet), HTML

Ausbildung

International Media and Computing
Master of Science
2015
Berlin

Über mich

I'm a (Senior) Android mobile app developer with ten years of experience building high quality apps as well as over two years of experience of working fully remote. In this time I maintained and enhanced large and feature-rich apps with several million active users. I'm fluent in Java, Kotlin, Englisch and German, also I'm able to teach designers regarding Google Material Design guidelines or backend developers regarding API expectations of mobile developers.

Weitere Kenntnisse

Android SDK, Kotlin, Java, AndroidX, ViewBinding, Magnet DI, Koin DI, Mapbox,
Picasso, JodaTime, OkHttp, EventBus, Room, Realm, greenDao,
Retrofit, Timber, Coroutines, RXJava, JUnit, Espresso, Mockito, Robolectric
Play Services, Support Libs/JetPack, Architecture Components,
Jackson/Gson, Toasty, SQLite, Realm DB, greenDAO, Room,
JavaScript/HTML/CSS, Bash, Solidity, React, MVVM, MVI, MVC, DataBinding, Scrum, Confluence, Jira, Bitbucket, Jetpack Compose, Ktor, Google Cloud, Gitlab

Persönliche Daten

Sprache
  • Deutsch (Muttersprache)
  • Englisch (Fließend)
Reisebereitschaft
DACH-Region
Arbeitserlaubnis
  • Europäische Union
Home-Office
bevorzugt
Profilaufrufe
3080
Alter
37
Berufserfahrung
14 Jahre und 3 Monate (seit 01/2010)
Projektleitung
1 Jahr

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