> Markdown version of [/jobs/ext/3791450-app-developer](https://www.wearedevelopers.com/jobs/ext/3791450-app-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # App Developer - **Company:** Standby GmbH - **Location:** Dinslaken, Germany - **Contract:** Permanent contract - **Skills:** Flutter, HTML, Java (Programming Language), JavaScript (Programming Language), Apple IOS, Automation of Tests, Cascading Style Sheets (CSS), Mobile Application Development, Code Review, Databases, Mobile Application Software, Software Engineering, Systems Integration, Web Services, Xamarin, Uikit, Swiftui, Delivery Pipeline, Swift (Programming Language), Backend, Git, Kotlin, React Native, Restful APIs - **Published:** October 17, 2026 - **Apply:** https://www.adzuna.de/details/5930744402 ## About the Role * Completed education in the field of application development (degree or vocational training) + required for front-end + for backend - preferred * Several years of experience in mobile application development - highly preferred * Strong knowledge of development for: + Android (Kotlin, Java) - required + HTML, CSS, and JavaScript - required + iOS (Swift, SwiftUI, UIKit) - highly desirable * Experience with cross-platform frameworks such as Flutter, React Native, or Xamarin is a plus - desirable * Knowledge of integrating REST APIs and database systems - highly desirable * Experience with Git and modern development processes - highly desirable * Knowledge of CI/CD pipelines and automated testing - highly desirable * C and C++ design, implementation, and testing - desirable * Knowledge of CAN - desirable Your personal skills * Analytical thinking and a structured approach to work + Ability to identify priorities when handling multiple tasks simultaneously * High level of initiative and a strong sense of responsibility + Asking for clarification when something is unclear + Keeping the work environment up to date and optimizing it * Ability to work in a team and strong communication skills + within the software team and development department + with customers, both internally and externally * Solution-oriented mindset * Interest in new technologies and continuous professional development * Good language skills in German and English; French is a plus ## Description * Design, implementation, and maintenance of mobile applications for Android and iOS * Conceptualization and implementation of new app features in close collaboration with business departments and customers/sales * Integration of interfaces (REST APIs, web services) and connection to backend systems * Integration of interfaces with embedded devices * Conducting code reviews and quality assurance measures * Error analysis, testing, and continuous optimization of existing applications * Planning, implementation, and testing of app releases * Creation and maintenance of technical documentation * Monitoring new technologies and trends in mobile development