Senior Flutter Developer Berlin | Mobile & Web App Expert
Experienced Mobile App Developer specializing in Flutter and cross-platform solutions. Lead Mobile & Web App Developer at INU University delivering exceptional user experiences with clean architecture. Available for positions and projects across Germany and Europe.
Walid Islam - Senior Flutter Developer Berlin Germany
Searching for an experienced Flutter developer in Berlin? Walid Islam is a senior mobile app developer with over 5 years of proven experience specializing in Flutter and cross-platform mobile development. Currently serving as Lead Mobile Developer at INU - Innovative University AG, delivering enterprise-grade mobile solutions.
Professional Flutter Development Services
Expert Flutter developer offering comprehensive cross-platform mobile app development, full-stack application solutions with scalable backend APIs, university and educational platform development, AI/ML integration in mobile applications, and enterprise-grade application development for businesses across Germany and Europe.
Technical Expertise and Skills
Flutter, Dart, Next.js, React, Vue.js, TypeScript, Swift, Kotlin, Node.js, Express.js, Laravel, Django, REST APIs, PostgreSQL, MongoDB, Firebase, Supabase, AWS, Azure, Azure AI Foundry, Docker, RAG (Retrieval-Augmented Generation), ML Integration, Computer Vision, TensorFlow, OpenAI API integration, Mobile UI/UX Design, Microservices Architecture, Cloud Infrastructure.
Professional Experience
Mobile Application Developer at INU - Innovative University of Applied Sciences
Sep 2023 - Present (2 yrs 4 mos) | Cologne, Germany | Remote | Full-time. Lead the development of the INU App, a cross-platform mobile application (iOS, Android, iPad, tablet & Web app) serving as the central learning hub for Germany's innovative online university, enabling students to access digital learning materials, complete coursework, and study offline. Architect and implement AI-powered educational features using Retrieval-Augmented Generation (RAG) pipelines integrated with Azure AI Studio and OpenAI APIs. Developed the technology foundation for AI-based professor avatars that provide 24/7 student support, answering questions about learning materials interactively and on-demand. Build and maintain full-stack solutions using Flutter/Dart for mobile, Vue.js for Admin, and Laravel backend services with REST APIs for seamless data synchronization across platforms. Leverage Microsoft Azure ecosystem including Azure Data Factory and Azure Machine Learning for data pipelines and ML model deployment supporting personalized learning experiences. Design intuitive UI/UX following iOS Design Guidelines and Material Design principles, ensuring accessible and engaging interfaces for diverse student populations. Skills: Flutter, Retrieval-Augmented Generation (RAG), Azure AI Studio, OpenAI APIs, Vue.js, Laravel, Microsoft Azure, Azure Data Factory, Azure Machine Learning, iOS Development, Android Development.
Mobile Application Developer at core sensing GmbH
Jul 2023 - Sep 2023 (3 mos) | Darmstadt, Germany | Remote | Full-time. Developed and enhanced a cross-platform mobile application (iOS & Android) enabling real-time visualization, configuration, and recording of industrial IoT sensor data from measuring amplifiers via Bluetooth Low Energy (BLE). Implemented efficient data serialization using Protocol Buffers (protobuf) for high-performance communication between mobile devices and IoT sensor nodes, ensuring reliable transmission of strain gauge, accelerometer, and environmental sensor data. Built features supporting simultaneous connection with up to 4 measuring amplifiers, live dashboard displays with configurable time intervals, diagram views, and CSV export functionality for measurement recordings. Implemented comprehensive test coverage using Patrol framework for native UI automation and integration testing, enabling testing of platform-specific features alongside Flutter widget tests. Skills: Flutter, Dart, Bluetooth Low Energy (BLE), Protocol Buffers (protobuf), IoT, Patrol Testing Framework.
Mobile Application Developer at Complori (acquired by cleverly)
Jan 2023 - Jun 2023 (6 mos) | Berlin, Germany | Hybrid | Full-time. Developed and enhanced a Flutter-based mobile learning application in the EdTech industry, supporting children aged 10-16 in learning programming through adaptive, gamified experiences alongside live coaching sessions. Built and shipped new features end-to-end using Flutter and Firebase ecosystem including Cloud Firestore for real-time data synchronization, Firebase Authentication, and Cloud Functions. Collaborated closely with design team using Figma to translate UI/UX concepts into polished, child-friendly interfaces with high usability standards. Wrote comprehensive unit and widget tests to ensure code quality and application stability; performed debugging and performance optimization. Contributed to a mission-driven startup focused on making coding education accessible to children across Europe. Skills: Flutter, Firebase, Cloud Firestore, Firebase Authentication, Cloud Functions, Figma, Unit Testing, Widget Testing.
5+ years Flutter development experience. Developed 15+ university platform apps, Berlin ArtWalk street art discovery app, ZenScript doomscrolling prevention app, and Nature Unlock digital wellness app.
Contact Information
Email: snapnsolve.apps@gmail.com
LinkedIn: https://www.linkedin.com/in/walidislam/
Xing: https://www.xing.com/profile/Walid_Islam2
Malt: https://www.malt.de/profile/walidislam
GitHub: https://github.com/walidx64
Portfolio: https://walidislam.space
Berlin,Germany
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