Published apps with signed builds, dedicated privacy policies, and ongoing updates.
A mood and well-being journal with AI that follows your context over time. Check-ins and journaling work offline on your device; long-term memory is consolidated on the server once a day, and the model key never leaves the backend.
An A1–C2 English learning platform with its own curriculum: 18 units, 54 missions, and 270 exercises, with an AI tutor, neural audio, and adaptive placement. All learning corrections happen on the server, never on the device.
The same Cadenvia learning engine, adapted for Spanish: a dedicated curriculum, AI tutor, and neural audio, with content redesigned for Portuguese speakers — including the false friends that trip up learners who think they already understand the language.
A Mandarin learning journey with its own A1–C2 curriculum: simplified Hanzi, pinyin with tone marks, listening, speaking, writing, classifiers, and contextual visual stories, with an optional AI tutor and server-confirmed progress.
A 3D path and precision game: draw wind currents with your finger and pulse when each garden lights up. Explore 24 levels across six chapters, with up to 72 stars. The tutorial and chapter 1 are free; chapters 2–6 are unlocked with a monthly subscription.
A shopping list that already knows which supermarket aisle each item belongs in, with 22 built-in recipes and natural-language search — “what can I make with chicken and potatoes?” — processed on your device without an internet connection.
A casual game in Brazilian Portuguese with three daily mini challenges — a word puzzle, mental math, and a logic sequence — in under a minute. Offline-first, no sign-up, and no ads during gameplay.
A 100% free social casino with virtual chips and no real money: 12 complete games — slots, roulette, blackjack, poker, baccarat, crash, and more — with a daily bonus, missions, achievements, and weekly rankings, in a luxury casino setting.
A library of 30 traditional card games, 100% offline: complete rules, bots that run on your device, saved games, history, and replays — no account and no server. Its Kotlin Multiplatform core shares the rules between Android and iOS.
These are not our own products: they were built within client teams, with contributions to mobile and web development, technical leadership, and solution architecture. Each card identifies the type of contribution and the company through which the work was provided. Only apps that remain published in the stores are listed.
Development and maintenance of the banking app in .NET MAUI Hybrid, including a complete layout redesign, management of releases in both stores, and continuous distribution integration.
Architecture and development of the motorcycle rental app in Xamarin.Forms and Xamarin.Android, with technical leadership and definition of the project’s mobile architecture.
Apps for health plan members in Xamarin.Forms, Xamarin.Android, and Xamarin.iOS, with contributions to mobile solution architecture: technical direction, corporate standards, and advanced escalation support for digital teams.
Supermarket apps built with Xamarin.Forms and Prism, including iBeacon device integration for in-store experiences and management of releases in both app stores.
Before mobile development, the focus was the web: REST services on Oracle Commerce (ATG) and Java Web layers for cosmetics and clothing e-commerce operations — exposing ATG components, JavaBeans, and servlets to store frontends, alongside layout development with HTML and JavaScript.
Both stores remain online and have evolved since then.
The same journey that takes an app from prototype to store, explained step by step. Published on Leanpub in PDF and EPUB, DRM-free, with an edition that includes the project’s complete source code.
XAML interfaces with MVVM, an ASP.NET Core API, authentication, offline-first SQLite, image uploads, testing, and automation — all the way to running on physical smartphones and tablets. The book has 227 pages in Portuguese, based on a project that works end to end.
The “Livro + Código-Fonte” (Book + Source Code) edition includes the complete .NET solution, tests, and build scripts.
Every product starts with an interactive prototype, evolves into native code on both platforms, and only reaches the store with a published privacy policy, a signed build, and a completed publishing checklist.
