03.03.2026 aktualisiert

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Senior Flutter- & AI-Engineer

Berlin, Deutschland Diplom-Informatiker (FH)
Berlin, Deutschland Diplom-Informatiker (FH)

Profilanlagen

Flutter & AI Expert - Sebastian Engel - Deutsch.pdf

Über mich

Als Flutter-Entwickler der ersten Stunde und mit starkem Android-Background setze ich seit 2012 komplexe App-Projekte erfolgreich um. Mein Fokus liegt auf der Entwicklung nachhaltiger Architekturen sowie der Optimierung von Entwicklungsprozessen durch AI-gestützte Workflows und moderne Toolchains.

Skills

FlutterAndroidmobileDeveloperApp EntwicklungiOSGoogle Dart
KURZPROFIL:

13+ Jahre Mobile-Expertise: Entwicklung und technische Leitung geschäftskritischer Anwendungen und Plattformen mit Fokus auf Flutter und native Android-Systeme

Senior Flutter & Android Engineer: Über 7 Jahre Spezialisierung auf Flutter sowie mehr als 6 Jahre Erfahrung in der nativen Android-Entwicklung (Java/Kotlin)

AI-gestützte Produktentwicklung: Produktiver Einsatz moderner LLMs, AI-Workflows und intelligenter Automatisierung zur Beschleunigung von Entwicklungs-, Analyse- und Release-Prozessen

Systemarchitektur & Qualität: Konzeption wartbarer, skalierbarer Architekturen auf Basis von Clean Code, Clean Architecture und Test-Driven Development

Tooling & Automatisierung: Aufbau stabiler CI/CD-Pipelines, Release-Prozesse und Entwicklungsumgebungen mit GitHub Actions und modernen Toolchains

Plattform- & Systemintegration: Tiefgehende Erfahrung mit Platform Channels, nativen Schnittstellen und hybriden Architekturen

Technische Beratung & Projektverantwortung: Begleitung von Kundenprojekten von
der Anforderungsanalyse über Architekturentscheidungen bis zum stabilen Betrieb

TECHNISCHER FOKUS & PROFESSIONELLER MEHRWERT:

Nachhaltige Systemarchitektur & Wartbarkeit: Konzeption skalierbarer Flutter- und Plattform-Architekturen zur langfristigen Sicherstellung technischer Stabilität und Erweiterbarkeit.

AI-gestützte Entwicklung & Tooling: Produktiver Einsatz von AI-unterstütztem Pair Programming (Vibe Coding), intelligenter Code-Generierung und teilautomatisierten Workflows sowie Aufbau intelligenter Entwicklungsumgebungen mittels Model Context Protocol (MCP) zur Beschleunigung von Analyse, Implementierung und Qualitätssicherung.

AI-Praxis & Technologie-Transfer: Kontinuierlicher Austausch in Formaten wie den „Gemini Startup Sprints“ und „Accelerate AI with Cloud Run“ im Berliner Google Office sowie direkte Überführung neuer AI- und Cloud-Konzepte in produktive Zielarchitekturen.

Native Expertise & Platform-Integration: Tiefgehende Android-Expertise zur Integration nativer Funktionen sowie zur Sicherstellung performanter Kommunikation zwischen Flutter, nativen Plattformdiensten und Systemressourcen.

Technische Führung & Projektverantwortung: Ganzheitliche Steuerung von Entwicklungsprojekten von der Anforderungsanalyse über Architekturentscheidungen bis zum Release sowie Etablierung stabiler Prozesse und Qualitätsstandards

TECHNOLOGIEN / KERNKOMPETENZEN:

Core: Flutter, Dart, FVM, BLoC, Clean Architecture, Git

AI & Tooling: Cursor AI (Pro), MCP-Integration, LLM-basierte Workflows, AI-gestützte Entwicklungsprozesse

Native & Plattform: Android (Java/Kotlin), iOS (Swift/Objective-C), Platform Channels

Backend & Cloud: Firebase (Authentication, Crashlytics, Firestore, Storage, Data Connect), Google Cloud, GraphQL, REST

Infrastruktur & Q: GitHub Actions (CI/CD), Test-Driven Development, Unit- & Widget-Testing

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Senior Flutter Developer

Fortytools GmbH

Sonstiges

Building the Fortytools Field Servcie app (Flutter).

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Magicline GmbH

Internet und Informationstechnologie

Supporting the mobile team at the Magicline GmbH, which is part of the Sport Alliance in building the mobile apps for clients like the RSG Group (McFit, John Reed, Golds Gym), the MySports app and other whitelabelled Fitness apps using Flutter.

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter & Android Developer

Karlmax Berlin GmbH & Co. KG

Internet und Informationstechnologie

Supporting the mobile team building Android apps and starting to support migrating the notebooksbillider.de app from iOS to Flutter.

- Flutter
- iOS
- Android
- Cross Platform

Senior Flutter Developer

EyeEm Mobile GmbH

Internet und Informationstechnologie

Supporting the EyeEm Mobile team migrating the existing Android and iOS apps to Flutter.

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Aitme GmbH

Internet und Informationstechnologie

Further feature development of the Aitme order terminal app. Handover to internal developers.

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Init AG

Internet und Informationstechnologie

Supporting the mobile team building multiple Flutter apps, e.g. the EU's Energielabel app and the "Bayern App".

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Android Developer

Karlmax Berlin GmbH & Co. KG

Internet und Informationstechnologie

Supporting the Android project teams with feature development, bug fixing and refactorings:

▪︎ Funk (Junges Angebot von ARD und ZDF)
"Funk” is what ARD und ZDF calls their "Junges Angebot" which is “a network with contents for young people between 14 and 29 years".

▪︎ Uniseminar
The Uniseminar Android app helps students at Swiss universities to learn their course contents using index cards.

▪︎ I-1 Camera
The "I-1" Android app enables its users to control their "I-1" Polaroid camera remotely with their smartphone via a Bluetooth connection.

Senior Flutter Developer

FYT

Internet und Informationstechnologie

Flutter team lead, Code Reviews, etc.

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Aitme GmbH

Internet und Informationstechnologie

Building an iPad-based order terminal application with Flutter.

- Flutter
- flutter_bloc
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Circ

Transport und Logistik

Migration of the Circ iOS Warehouse app to Flutter.

- Flutter
- iOS
- Android
- Cross Platform

Senior Flutter Developer

LEX superior GmbH

Wirtschaftsprüfung, Steuern und Recht

Flutter consulting & refactoring and feature development for the Lex Superior app.

- Flutter
- iOS
- Android
- Cross Platform

Senior Flutter Developer

Karlmax Berlin GmbH & Co. KG

Internet und Informationstechnologie

Supporting the team migrating the notebooksbilliger.de app to Flutter.

- Flutter
- iOS
- Android
- Cross Platform

Senior Android Developer

New Horizon GmbH

Internet und Informationstechnologie

Building the Gapless Car History app for Android.

Senior Android Developer

MHP - A Porsche Company

Internet und Informationstechnologie

Building the Gapless Car History app for Android.

Senior Android Developer

AOK Systems GbmH

Versicherungen

Lead Android Developer for the development of a new Android app for the AOK Systems GmbH.

Tasks, i.a.:
▪︎ Conception and implementation of the app architecture
▪︎ Setup of the initial app project
▪︎ Introduction of Git Flow, code reviews and codestyles
▪︎ Feature development
▪︎ Implementing unit tests
▪︎ Guiding Junior Android Developers

Senior Android Developer

Immobilienscout24 GmbH

Internet und Informationstechnologie

The “Immobilien Scout24” Android app enables its users to search for and to create real estate ads on Germany’s biggest real estate platform ImmobilienScout24.

Supporting the Android team at i.a.:
▪︎ Feature development
▪︎ Implementing unit and integration tests
▪︎ Bug fixing
▪︎ Refactorings
▪︎ Code modularizations
▪︎ Interviewing further Android developers

Senior Android Developer

Netzwiese GbR / Berliner Stadtreinigung

Internet und Informationstechnologie

Continued development of the BSR "Abfall App".

With the BSR "Abfall App" the Berliner Stadtreinigung offers a mobile access to their most important services to their customers. Those are, i.a., a location finder, a swap- and give-away-market, ordering a bulky waste removal, a recycling list and the integration of their YouTube channel.

Senior Android Developer

The Impossible Project

Medien und Verlage

Porting the "Impossible Project" iOS App to Android.

The "Impossible Project" Android app enables its users to scan Polaroid photos and to upload those into the "Impossible" gallery. Additionally photos on the smartphone can be developed as Polaroid photos using the Instant Lab, an additional hardware.

Senior Android Developer

Netzwiese GbR / Berliner Stadtreinigung

Internet und Informationstechnologie

Continued development of the BSR "Abfall App".

With the BSR "Abfall App" the Berliner Stadtreinigung offers a mobile access to their most important services to their customers. Those are, i.a., a location finder, a swap- and give-away-market, ordering a bulky waste removal, a recycling list and the integration of their YouTube channel.

Senior Android Developer

Deutsche Telekom - Products & Innovation

Internet und Informationstechnologie

Development of a client app for the "Zelect" media platform.

"Zelect" was a project of the "Products & Innovation" department at Deutschen Telekom. The platform was build up with a backend, a web frontend and the apps. As the budget was cut during the development, the platform was never published.

Tasks, i.a.:
▪︎ Concepting the Android client app
▪︎ Supporting the backend and frontend teams (Java)

Senior Android Developer

Netzwiese GbR / Berliner Stadtreinigung

Internet und Informationstechnologie

Porting the "BSR Appfall App" from iOS to Android.

With the BSR "Abfall App" the Berliner Stadtreinigung offers a mobile access to their most important services to their customers. Those are, i.a., a location finder, a swap- and give-away-market, ordering a bulky waste removal, a recycling list and the integration of their YouTube channel.

Java Software Developer

tarent solutions GmbH

Internet und Informationstechnologie

Development of JSE und JEE applications

Projects:
▪︎ "PolarIS - Interaktiver Funkstreifenwagen" + "Aquila Middleware” for the "Zentraldienst der Polizei Brandenburg"
∙ Implementing the MultiPC software with job-, camera- and navigation components for usage in the police car
∙ Implementing the backend webservices for the MultiPC software
∙ Implementing a web portal for the management of units and POIs and for the MultiPC remote maintenance
∙ Integration of an Identity and Access Management System

▪︎ "Identity and Access Management"
∙ Further developing the backend webservices
∙ Further developing the web portal
∙ Taking over the technical lead

▪︎ "verinice"
∙ Implementing the encryption functionality into "verinice" for the partner company "sernet

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