Flutter Experts in Munich

struppilog.com – Digital health record for pets / MVP → Full Product

Design, development, and full further development of a digital health platform for pets – from my own MVP development to a fully built and production-ready platform.

Independent concept and development of the MVP Development of the full application with Flutter/Dart and Firebase Expansion of the MVP into a full digital health record with health data, findings, allergies, medications, documents, and emergency data Development of user registration, authentication, roles, data models, and secure user interactions Implementation of QR-code-based data exchange and digital interaction features Development of a multilingual, responsive web application Integration of AI-supported features and AI/agentic workflows Development and continuous improvement of product logic, UX/UI, and technical architecture Building and expanding a scalable cloud-based solution with Firebase Integration and further development of APIs and external services Use of AI-native / agentic engineering to speed up development, testing, debugging, and product iteration Independent implementation of all other features and technical extensions Continuous further development of the MVP into a full digital product

Impact: The MVP I built myself was continuously developed technically and functionally into a broad, production-ready platform – including frontend, backend, data model, authentication, UX/UI, APIs, cloud infrastructure, and ongoing product development.

• Applied modern JavaScript features, including ES6+ syntax, destructuring, modules, array methods, and asynchronous programming, to develop efficient and readable frontend code.
• Implemented frontend integration patterns for PHP and Laravel backend services, connecting React interfaces to REST APIs and handling structured JSON data.
• Developed interactive, functional component-based frontend applications using React Hooks, JavaScript, and TypeScript, alongside backend applications and RESTful APIs using Python, Django, Flask, and FastAPI, focusing on reusable components, modular architecture, maintainability, and efficient data processing.
• Maintained a dynamic portfolio platform using PHP, Laravel, Livewire, and MySQL, implementing end-to-end functionality across frontend interfaces, backend services, and database operations.
• Validated server-side request handling, routing, middleware, and form validation using Laravel features to support reliable application workflows and consistent data processing.
• Designed and managed relational database structures using MySQL and Laravel Eloquent ORM, implementing data models, relationships, database migrations, and efficient queries for content management.
• AI-powered applications integrating Large Language Models (LLMs) through external APIs and locally hosted models, exploring practical use cases for conversational AI, intelligent automation, and AI-assisted workflows.
• Built local AI applications and developer tools for running, configuring, and interacting with locally hosted language models, gaining experience with local inference, model integration, and privacy-conscious AI workflows.
• Explored Retrieval-Augmented Generation (RAG) approaches to combine language models with external knowledge sources, enabling context-aware responses based on relevant application data and retrieved information.
• Integrated AI services with backend APIs and application components, developing reusable modules for model communication, response processing, error handling, and data exchange.

• Taught German language and mathematics to children aged 4-16, providing homework assistance and tutoring
• Supported startups in UX, MVP development, and Lean Startup methodology
• Assisted with branding, communication, and design to strengthen market presence
• Maintained website and Venture Lab app; coordinated and ran events
• Developed presentations to support internal and external communications

• Researched, developed, and implemented comprehensive digital strategy to modernize and accelerate processes of sports club with approximately 1300 members.

• System Architecture & Implementation: Conceived and set up central cost- and energy-efficient ARM-based server infrastructure.

• Selected, installed, and configured open-source solutions for knowledge management, ticket booking, and member management.

• Product manager/ owner for the data, web and mobile teams (Java, REST API, Angular, React, Flutter)
• Close collaboration with the executive team (CPO & CTO) to help them make decisions by representing the product voice
• Managed sprints in an agile workflow (SCRUM & Kanban) including sprint planning, reviews, retrospectives and backlog management for two teams, covering requirements and ticket grooming/estimation
• Moderation of SCRUM meetings
• Wrote epics and user stories in close collaboration with engineering team leads, translating business requirements into technical user stories
• Definition and execution on OKRs
• Designed, built and hired a product structure of eight individuals, including product managers, a UI/UX designer and a product analyst
• Results: increased offer activation rate eightfold.

• Designed and developed the "Credit Risk Engine" using Camunda, Node.js and Typescript
• Greenfield project for credit card credit assessment for existing and new customers, including EBA KPIs, SCHUFA and CRIF scorings
• Built and modeled workflows (BPMN) and decision logic (DMN) with Camunda Modeler in close collaboration with stakeholders
• Implemented service tasks, user tasks and jobs with Nest.js, Node.js and Typescript, including exception handling
• Backend-for-Frontend (BFF), frontend with React, Tailwind and Ant Design UI library
• CI/CD with GitLab, Kubernetes/Rancher

• Built and managed a high-performing native app team (Android & iOS) from scratch
• Modernized the finance application with new features, leveraging Kotlin, Java, and Spring Boot microservices
• Introduced and scaled backend services enabling secure, high-traffic financial transactions for millions of users
• Improved development efficiency with custom tools for crash reporting, CI/CD pipelines, and release management
• Led recruitment, coaching, and mentoring of developers, fostering professional growth and cross-functional collaboration

• Developed and maintained the large-scale Check24 car insurance native Android app serving millions of users using Jetpack Compose.
• Owned the end-to-end implementation of new features, including planning, development, and delivery in an Agile/Scrum environment.
• Refactored legacy Java code into a modern Compose architecture, improving maintainability and long-term scalability.
• Performed code reviews for team members via Bitbucket, ensuring code quality, architectural consistency, and Kotlin best practices.

• Further development of the internal "ECockpit" platform with an Angular 17 frontend and .NET (C#) backend
• Maintenance and further development of Azure DevOps pipelines
• Introduction of technical improvements in build & release processes
• Collaboration on a modular architecture approach (Clean Architecture & DDD)
• Focus on scalability and secure data processing
• Tech stack: Angular 17, .NET / C#, Azure, Azure DevOps, Git, CI/CD, Clean Architecture, Domain Driven Design

• Development of the ginlo Messenger client, emphasizing stringent data protection compliance as mandated by German legislation.

• Provided German services for diverse clients
• Executed recent English projects for Sport Bründl, Haigh’s, Chiemsee Media
• Delivered services in French and Spanish

• Developed the Chrome plugin mailsome.ai for AI-powered email reply generation
• Used OpenAI API, Stripe, Node.js, TypeScript