Developer
web & mobile

I design and build web and mobile applications to help startups and companies launch reliable, modern, business-focused products.

Let's discuss your project
Portrait of Adonsi Jules
class MainActivity : ComponentActivity()
class UserViewSet(ModelViewSet)
suspend fun syncSteps(): Result
TECH STACK

Expertise & Specialties

🐍

Python/Django backend

Design and development of reliable backend services with Python and Django, including high-performance APIs, database integration, process automation, and maintainable deployments.

DjangoDRFPostgreSQLCeleryRedis
đŸ“±

iOS/Android mobile development

Mobile application development with Kotlin and Jetpack Compose, using modern architectures, reactive interfaces, maintainable code, and reliable integration with APIs and business services.

KotlinJetpack ComposeCoroutinesKtorMVVMReact Native
đŸ…°ïž

Web application design with Angular

Design and development of modern web applications with Angular, focused on clear architecture, robust interfaces, reusable components, and clean integration with business APIs.

AngularTypeScriptRxJSAngular MaterialREST APISPA
PORTFOLIO

Selected Projects

Android app

Rsante

Android fitness tracking app focused on walking, with real-time metrics, full history, and daily performance monitoring.

Rsante was designed to deliver a smooth and reliable walking-tracking experience, from onboarding to background monitoring. The app includes guided onboarding, a home space centered on daily progress, detailed history, and a user profile with consolidated statistics.

Screenshots

Rsante screenshot 1
Rsante screenshot 2
Rsante screenshot 3
Rsante screenshot 4
Rsante screenshot 5
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Key features

  • Onboarding persisted with DataStore and local authentication powered by Room.
  • Real-time walking tracking with steps, distance, calories, timer, pause/resume, and secure stop flow.
  • Foreground service with notification to keep tracking active in the background.
  • Complete walking history and global statistics available from the user profile.

Tech stack

KotlinJetpack ComposeMaterial 3MVVMClean ArchitectureRoomDataStoreHiltKotlinx Serialization
TECH BLOG

Articles & Tutorials

Le développement mobile cross-plateforme est-il en train de changer de paradigme ?
Blog📅 Apr 03, 2026

Le développement mobile cross-plateforme est-il en train de changer de paradigme ?

Pendant longtemps, développer une application mobile signifiait faire un choix clair : iOS avec Swift, Android avec Kotlin, ou recourir à des solutions cross-plateforme comme React Native, Flutter ou

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Jetpack Compose : Optimiser les recompositions et les performances dans une liste dynamique
Blog📅 Mar 30, 2026

Jetpack Compose : Optimiser les recompositions et les performances dans une liste dynamique

Quand on développe avec Jetpack Compose, comprendre la recomposition est essentiel pour construire des interfaces performantes et fluides. Dans cet article, nous allons voir comment gérer efficacement

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Du backend au mobile android une histoire d’attirance.
Blog📅 Mar 21, 2026

Du backend au mobile android une histoire d’attirance.

Un backend curieux qui devient, dĂ©veloppeur mobile android, une histoire d’attirance pour le mobile. Ça va ĂȘtre long donc 
.. J’ai beaucoup fait du backend, et j’en fait toujours d'ailleurs, le fronte

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CrĂ©er un Ă©cran d’Onboarding moderne avec Jetpack Compose(HorizontalPager)
Blog📅 Feb 19, 2026

CrĂ©er un Ă©cran d’Onboarding moderne avec Jetpack Compose(HorizontalPager)

L’onboarding est une Ă©tape essentielle pour prĂ©senter votre application aux nouveaux utilisateurs. Un Ă©cran clair, fluide et animĂ© permet d’amĂ©liorer l’expĂ©rience utilisateur dĂšs les premiĂšres seconde

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Let's Work Together

If you want to discuss a project or a technical need, I am available to explore the right solution with you.

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