---
title: Projects
canonical_url: "https://robocitrus.com/en/projects"
last_updated: "2026-07-19T00:10:43.187Z"
locale: en
meta:
description: "Successful projects by Maximilian Flechtner - From apps with thousands of users to conversion-optimized websites. Hundeo, Fussballhero, Wasserradler and more."
"og:description": "Successful projects by Maximilian Flechtner - From apps with thousands of users to conversion-optimized websites. Hundeo, Fussballhero, Wasserradler and more."
"og:title": Projects
---
RoboCitrus - Home
**Portfolio**
# **My **Projects
I'm not just the person writing code π» I think along, bring my own ideas, and stick with it until the result is right. Every project here shows how I worked with my clients to turn ideas into real products π
*When I see real people using the things I built, I know why I do this π Whether it's an app, a backend, or an entire system, what drives me is solving problems and building things that work and that people actually enjoy using βοΈ*
**β Maxi**
[**In-House Product β App, Web & Backend****DragonBoat Hub**
My own app for dragon boat teams: lineup, live tracking and race admin. Open beta on iOS, Android and the web.**Flutter****Serverpod****Full-Stack Dart****iOS Β· Android Β· Web****Open Beta****Eigenes Produkt**](https://robocitrus.com/en/projects/dragonboat-hub) [**App, Web & Backend Development****Hundeo**
AI-powered dog training app with over 500 tricks, personalized training plans, and an active community. Thousands of satisfied users train daily with Hundeo.**Flutter****KI-Integration****GoLang Backend****Microservices**](https://robocitrus.com/en/projects/hundeo) [**App & Backend Development****QUESS**
Bluetooth device and app that make gut feelings measurable. With smart AI for even better results.**Flutter****Bluetooth/BLE****Serverpod****Full-Stack Dart**](https://robocitrus.com/en/projects/quess) [**Ecosystem: App, Web Dashboard & Backend****Baustellenplaner**
Complete ecosystem for fiber optic construction: Mobile app (Android & iOS), web dashboard, and backend from one codebase. Digital construction documentation, crew planning, and order management.**Flutter****Serverpod****Full-Stack Dart****Offline-First****Ecosystem**](https://robocitrus.com/en/projects/baustellenplaner) [**Web Design, Development, Content Creation & Hosting****Wasserradler**
Modern company website for water bicycle rental. With user-friendly design and intuitive booking functionality, optimized for mobile devices.**Vue.js/Astro****Tailwind CSS****SEO****Hosting**](https://robocitrus.com/en/projects/wasserradler) [**Web Development and Backend****ImmoPlanet Schellenberg**
Professional company website for a skilled trades business in Dortmund. Project portfolio, services overview, and contact form with Go backend.**Nuxt 4****Go Backend****Tailwind CSS****SEO**](https://robocitrus.com/en/projects/immoplanet) [**App Development & Design****Fussballhero**
Gamification app for young footballers. Transforms real training performances into virtual achievements and motivates through challenges, rankings and social features.**Flutter****Firebase****Gamification****MVP**](https://robocitrus.com/en/projects/fussballhero) [**Web Design & Development****Drachenbootevents**
Landing page for dragon boat events in Berlin and Potsdam. Conversion-optimized for team events with clear call-to-actions and mobile-first design.**PHP****Bootstrap****SEO****Hosting**](https://robocitrus.com/en/projects/drachenbootevents) ## **Let's Connect! π**### **Ready for your next project? **** Let's get started!** #### **Maximilian Flechtner **[flechtner@robocitrus.com](mailto:flechtner@robocitrus.com) [ +49 0176 41766223](tel:+4917641766223) ### **Let's get started** Tell me about your vision β just drop me an email or use the contact form. Let's plan your digital success together! πͺ [Send me an email](mailto:flechtner@robocitrus.com) [Contact Form](https://robocitrus.com/en/kontakt)