Ahmet C.
Senior Android Developer
Experience
Senior Android Developer
enbw
- Restructuring and designing the group’s internal Android apps
- Defining key modules and implementing components with accessibility in mind
- Collaborating internationally and gradually establishing an agile approach
- Technologies & methods: Kotlin, Android, JUnit 5, Koin, Azure DevOps, Android Studio, Git, Jetpack Compose, Coil, Flow API, Ktor, Coroutines, TypeScript, NodeJS
Senior Android Developer
Comdirect
- Continuous development of the PhotoTAN app with Kotlin
- Expanding an agile team of developers and testers to implement requirements
- Requirements engineering for the technical shaping of user stories
- Responsible for merge and build processes with Jenkins
- Working with backend developers to continuously optimize the REST API
- Integrating external SDKs to extend app functionality
- Implementing accessibility features according to legal requirements
- Technologies & methods: Kotlin, Android, JUnit 5, Hilt, Koin, Jenkins, Nexus, Android Studio, Git, Bitbucket, Jetpack Compose, Coil, Flow API, Ktor, Coroutines
Senior Android Developer
Research Industrial Systems Engineering GmbH
Developing the electronic patient record (EPA) as a Gematik-compliant solution for health insurers and service providers
IAM SDK & UI module:
Clarifying responsibilities within health insurers for successful integration
Setting up a dedicated team for SDK integration, maintenance, and updates
Leading the team in technical details for smooth onboarding
Establishing processes for integration, updates, and bug fixing
White-label app (FdV – front end for insured users):
Developing a white-label app with full IAM SDK functionality
Enabling quick market launch with flexible branding options
Technologies & methods: Kotlin, Android, IAM SDK, Hilt, Gematik standards, Android Studio, Git
Senior Android Developer
OTTO Group
- Further development of white-label Android apps for Quelle, Ackermann, Baur, and Universal
- Introducing dependency injection, Flow API, and Jetpack Compose
- Ensuring code coverage by setting up unit tests
- Coordinating communication between technical teams during planning
- Planning and conducting a session to introduce a tracking service
- Technologies & methods: Kotlin, Android, Swift, YAML, SQLite, Git, GitLab, Android Studio, Xcode, Visual Studio Code
Project "Trip Tracker"
Kayahan GmbH
- Concept phase and development of a Flutter web app for digitizing the trip log
- Teamwork with two developers over eight months
- Technologies & methods: Flutter, Dart, Android, Swift, Firebase, Git, GitHub, Visual Studio Code
Technology Consultant
ALDI Einkauf SE & Co oHG
- Building the infrastructure for the ALDI Nord Android and iOS apps based on Azure DevOps
- Setting up Android and iOS pipelines in collaboration with a DevOps engineer
- Technical evaluation of applicant companies and selection of a new development partner
- Building a cross-functional team for native Android and iOS development
- Further development of the existing ALDI Nord Android app with Kotlin and MVP architecture
- Introducing Open API Spec for targeted team communication
- Implementing a reactive approach with RxJava
- Consulting, onboarding new employees, and support with automated tests using Appium and BrowserStack
- Technologies & Methods: Kotlin, Android, Swift, YAML, Room, SQLite, Azure DevOps, Android Studio, Xcode, Visual Studio Code, Git, Appium, BrowserStack
Senior Software Engineer
adesso mobile solutions GmbH
Project "Miele – Relaunch":
Development and orchestration of modules in an existing app product environment with up to 40 teams
Delivery of UI components and introduction of UI tests with Xamarin.UITest
Creation of documentation and presentations at developer conferences
Project "Smart Shopping App":
Building the backend structure in Azure with Node.js
Designing the REST API and domain model
Generating generic categories from the Swiss nutrition database
Delivering a demo app for Android developers
Project "Vivawest Customer Portal":
Architecture and basic framework of a hybrid app with a browser container and native code communication
Implementation in a Kanban team with direct customer contact
Project "Liebherr bauma App":
Architecture and implementation of backend services with ASP.NET and Azure Functions
Extraction and delivery of assets via Blob Storage and Azure triggers
Implementing an event service with Azure Notification Hub
Project "Ritz Hardness Tester App":
Leading the development of a cross-platform Xamarin app for Erichsen testing devices
Designing and implementing the control logic via HTTP endpoints
Close collaboration with customers for device configuration
Technologies & Methods: C#, Xamarin, .NET Standard 2.0, Entity Framework Core, Node.js, Azure, Blob Storage, Mobile App Services, YAML, MSSQL, SQLite, Visual Studio, Git, Bitbucket, Artifactory, Bamboo
Tax Software for Associations "Verio Accounting"
Ahmet Cavus, IT-Services u. Consulting
- Development and delivery of accounting software that reads QIF formats via a custom-built QIF reader library and prepares them for further processing.
- Implementation of a Python-based data pipeline to clean accounting data and prepare it for final generation of donation receipts.
- The data goes through these process steps:
- Ingest: importing and structuring the data
- Transform: cleaning and AI-driven optimization
- Store / Publish: storage and report generation
- Continuous development of the application with new features – most recently integrating AI support for optimized data analysis
- Delivery via the AppCenter
- Open Source: [link]
Software Engineer
TeamWFP
- New development of the real Services App with Xamarin Forms and .NET C# using the MVVM pattern
- Technical architecture and framework for digital receipt, PAYBACK, and loyalty point services
- Relaunch of the real Android Services App with Java and MVC architecture
- Taking over and maintaining the Kingchess correspondence chess platform, integrating social login and fixing timing bugs
- Development of a Java Swing configurator for Kuntze Instruments for reading and analyzing measurement data
- Development of the real Drive Android App for drive-in orders with the MVC pattern
- Design and implementation of a Windows Phone app for the real self-service store with MVVM architecture
- Technologies & Methods: C#, Xamarin, Java, ASP.NET, Java Swing, Eclipse, Android Studio, Visual Studio, Silverlight, MVVM, MVC, REST, Git, Mercurial
Summary
With over 13 years as a software developer, I’ve worked on projects at various companies and in fields like retail, cross-industry, healthcare, and banking. My main focus has been mobile application development, and I have expertise in both native and cross-platform development. Teamwork, close collaboration with colleagues, and proactive ownership are key to successful cooperation with project stakeholders and clients, which I particularly focus on in my work. Based on that, I place special value on creating value together as a team, where WE is at the center. This results in high-quality code. In the future, I want to expand my skills in AI with Python and front-end development with TypeScript to gain new goal-oriented perspectives in software development.
Languages
Education
Bachelor of Science · Applied Computer Science
Teaching Degree for Secondary Education · Secondary Education Teaching
Certifications & licenses
Generative AI For Software Development
Deeplearning.AI
Azure Fundamentals AZ-900
Microsoft
Cyber Security Awareness
SoSafe
Similar Freelancers
Discover other experts with similar qualifications and experience
- English
- Deutsch
2025 © FRATCH.IO GmbH. All rights reserved.