> Markdown version of [/jobs/ext/3524001-senior-front-end-developer](https://www.wearedevelopers.com/jobs/ext/3524001-senior-front-end-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). --- # Senior Front End Developer - **Company:** Siemens Energy - **Location:** Mülheim an der Ruhr, Germany - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Flutter, ASP.NET, Java (Programming Language), JavaScript (Programming Language), Computer Animation, Computer-Aided Design, Adobe Illustrator, Adobe Photoshop, Agile Methodology, Amazon Web Services, Software Applications, Application Performance Management, HTML5, Microsoft Azure, C++ (Programming Language), Cascading Style Sheets (CSS), Cloud Computing, Cloud Engineering, Code Reuse, Code Review, Computer Networks, Web Development, Perl (Programming Language), Design of User Interfaces, Interaction Design, JSON, Python (Programming Language), Mockito, Systems Integration, Web Applications, Data Logging, Scripting, ReactJS, Firebase, Backend, Git, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Dart, Graphql, Web Technologies, React Native, Front End Software Development, React Redux, React Testing Library, Restful APIs, Multiplatform, Software Version Control, Docker, Programming Languages - **Published:** October 2, 2026 - **Apply:** https://www.adzuna.de/details/5903064896 ## About the Role · Experience with Firebase, GraphQL, or other backend integrations · Knowledge of web development best practices, Flutter Web, and React Native · Understanding of agile methodologies and working in a collaborative team setting What You Bring * 5+ years of demonstrable IT experience in frontend development * Proven experience with Flutter/Dart and React/JavaScript in building complex mobile and web applications * Familiarity with state management solutions for both Flutter (e.g., Provider, Bloc, Riverpod) and React (e.g., Redux, MobX, Context API) * Experience with version control systems (e.g., Git) and CI/CD pipelines * Understanding of RESTful APIs, JSON, and integrating third-party libraries * UI/UX sensibility with a good eye for detail and commitment to quality * Excellent problem-solving skills and a proactive approach to development * Ability to switch between Flutter and React projects as needed * Practical experience with cloud platforms like Azure and AWS, and implementing CI/CD pipelines * Experience with cloud-native architecture and infrastructure-as-code tools * Hands-on experience with containerization tooling (Docker, K8s, Podman) * Container orchestration and workload management with Kubernetes * Experience with monitoring and logging tooling * Understanding of networking concepts in cloud setups (VPCs/Gateways/etc.) * Prior experience with testing frameworks (e.g., Flutter Test, Mockito, Jest, React Testing Library) * Familiarity with cross-platform development and ability to optimize for different devices and browsers ## Description Web Applications Design & Development Engineering (High Tech) work focuses on designing the look/feel/user experience in addition to programming the functionality of interactive web applications. Web Applications are defined as: Cross-platform applications installed on remote servers and accessed through the internet Developed using standard web technologies (i.e., HTML5, JavaScript, and CSS) that work across multiple devices Developed for use as a product by external customers (vs. as an e-commerce website/online sales tool, external marketing/communications website, or internal company intranet website). Web Applications designers/developers: Create the overall visual, audio, and interactive design of the web application Create and manipulate individual design elements (e.g., audio, video, still images, animation, text, etc.) using graphic/multi-media design software (e.g., Photoshop, Illustrator, Protocols, Aftereffects, etc.) Develop the architecture and program the functionality of the web application using programming languages (e.g., ASP, Java, Perl, Python, C++, etc.) in addition to scripting languages (HTML5, JavaScript, CSS) Specialization Match Note: Incumbents who develop websites or web applications for the purposes listed below should be matched to the applicable Website Design & Development: Communications & Marketing or Website Development: E-Commerce specialization: Marketing or e-commerce websites or web applications providing customer self-service support or account management Web applications used primarily to deliver/organize virtual content or information purchased by customers How You'll Make an Impact * Develop and maintain mobile and web applications using Flutter/Dart and React/JavaScript * Collaborate with designers, product managers, and other developers to deliver high-quality applications * Translate UI/UX designs into responsive, performant, and reusable code for both Flutter and React projects * Write clean, maintainable, and well-documented code * Optimize application performance and solve issues across different platforms * Collaborate in code reviews and contribute to team learning * Implement integrations with RESTful APIs and third-party libraries * Stay up to date with Flutter, React, and related technologies * Implement, and manage cloud-native solutions on AWS * Automate cloud infrastructure provisioning and management using Infrastructure-as-Code (IaC) tools * Monitor and troubleshoot Kubernetes workloads, networking, and resource allocation * Develop, package, and maintain applications as containers, ensuring portability and consistency across environments. * Deploy, and manage Kubernetes workloads ## Related Videos - [Intro to Flutter Development](https://www.wearedevelopers.com/videos/170-intro-to-flutter-development) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [Dart - a language believed dead, experiences a new bloom](https://www.wearedevelopers.com/videos/442-dart-a-language-believed-dead-experiences-a-new-bloom) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Using Serious Tech for a Silly Game - How to Build an MVP with Flutter](https://www.wearedevelopers.com/videos/728-using-serious-tech-for-a-silly-game-how-to-build-an-mvp-with-flutter) - [Flutter Packages and Plugins - A Look Under the Hood](https://www.wearedevelopers.com/videos/555-flutter-packages-and-plugins-a-look-under-the-hood) ## Related Articles - [Frontend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/195-frontend-developer-salary-in-germany-2023) - [Software Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/194-software-developer-salary-in-germany-2023) - [Backend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/196-backend-developer-salary-in-germany-2023) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Fullstack developer salary in Germany [2023]](https://www.wearedevelopers.com/magazine/197-fullstack-developer-salary-in-germany-2023)