# Carlos Codes for Me > Freelance AI full-stack developer (Flutter, .NET, Blazor, Python, NuxtJS, AWS) offering fixed-price Android MVP development in 48 hours, custom web and mobile applications, AI visibility tooling, and Coursera-published guided projects. Based in Germany. ## About - [Carlos Codes for Me](https://carloscodesfor.me/): Personal site of Carlos Arias, freelance software developer — services, portfolio, tools, and contact. [scan] ## Services - [Android MVP in 48 Hours](https://carloscodesfor.me/mvp): Fixed-price (€3,000) Android MVP built in 48–96 hours using Flutter and Dart — delivered with signed APK, full source code transfer, and architecture walkthrough. [scan] - [Mobile Apps](https://carloscodesfor.me/mobile-apps): Portfolio of published Android apps built with Flutter, including Sudoku Dark (dark-theme puzzle game) and PricePower24. [scan] - [Web Applications](https://carloscodesfor.me/web-apps): Portfolio of web app projects including wievielnetto.de (German net salary calculator), Erechnung.shop (e-invoice tooling), and ClausClick.art (art platform). [scan] - [Courses](https://carloscodesfor.me/courses): Five Coursera guided projects covering Django migrations, Qlik Sense dashboards, Cloud Foundry blue-green deployment, OpenAI assistants, and SmartBear API development. [scan] ## Tools - [GEO Analyzer](https://carloscodesfor.me/geo-analyzer): Free AI search visibility audit — checks llms.txt quality, JSON-LD structured data, and content depth for Generative Engine Optimization (GEO). [scan] ## Articles - [How to Validate Your Mobile App Idea](https://carloscodesfor.me/articles/how-to-validate-your-mobile-app-idea): Five-step framework for validating mobile app demand before development — covers audience research, competitor analysis, MVP strategy, and practical tools including Flutter and no-code platforms. [scan] - [Best Features for Your Next Mobile App in 2026](https://carloscodesfor.me/articles/best-features-mobile-app-2026): Guide to the most impactful mobile app features in 2026 — edge computing, on-device AI, cross-platform Flutter development, 5G real-time features, security-by-design, and predictive UX. [scan] ## Contact - [Contact](https://carloscodesfor.me/contact): Project enquiry form for web apps, mobile apps, MVPs, and collaborations. [scan] ## Legal - [Imprint](https://carloscodesfor.me/imprint): Legal disclosure as required by German law (Impressum). [scan]