Kotlin Jobs

I’m building a new social networking platform and need a native Android app created from the ground up. The core goal is to give users an intuitive way to connect, share content, and interact in real time, all inside a modern, responsive interface that feels perfectly at home on current Android devices. You’ll take the project from concept to Google Play–ready release, advising on best practices for architecture, security, and UI while keeping performance in mind. Clean, well-commented code (Kotlin or modern Java) is essential so the project can scale and be maintained easily after launch. To keep expectations clear, here’s what I’ll be looking for at hand-off: • Compiled, installable APK ready for testing • Full source code with clear docu...

I need a lightweight Android application that I can run from my local machine (localhost / emulator) and export as an APK. Its core purpose is simple: display a “preoutcome” value to the user before any further action is taken. I will handle the back-end logic that generates this value; you will focus on the Android front end, the connection to my localhost endpoint, and the clean presentation of the result. Please build with standard Android tools (Android Studio, Kotlin or Java—your choice) so I can open, tweak, and re-build the project easily. Keep the interface minimal yet clear: a single screen that fetches the data from http://localhost or (for emulator), shows a loading state, then renders the preoutcome. No additional features such as in-app purchases or notific...

We are Optedif Formation, a French training organization delivering short professional training programs for adults, entrepreneurs, employees, freelancers, job seekers and people in career transition. We are looking for experienced trainers, instructors or subject-matter experts in Développement mobile natif (Native Mobile Development) to deliver short training sessions in French. The training may be delivered remotely or on-site depending on the learners’ needs. Scope of Work The selected freelancer will be expected to: * Deliver short training sessions in French * Adapt explanations to adult learners * Share practical and operational knowledge * Use existing training material or help improve it when needed * Create a positive and constructive learning environment * Supp...

I want an Android-only social media app built from scratch. The core goal is to let users create accounts, post updates, follow one another, and engage through comments or likes. I’m open to your preferred tech stack, as long as it follows current Android guidelines and results in a smooth, modern UI. Key expectations: • Account creation and secure login (email, Google, or phone). • Main feed that displays text, photo, or short-video posts in real time. • Basic engagement tools: like, comment, and follow. • User profile page with avatar, bio, and post history. • Simple, intuitive navigation that feels native to Android. • Clean, well-documented code plus a compiled APK for testing. Please outline the libraries or frameworks you plan to use, e...

I’m building a dedicated Android shopping app for Sidhshree Tea so my wholesale customers can browse, buy, and track their favourite blends with ease. The interface should feel warm and familiar, following a traditional gold-and-green palette that matches our brand. Core user flow • Mobile-number login and optional OTP verification • Product catalogue split initially into Loose Tea and Tea Bags (I may add Gift Packs later) with images, weights, live prices, and stock levels • Cart, checkout, and a choice of UPI, PhonePe, Google Pay, Paytm, debit/credit card, or Cash on Delivery • Automatic payment success screen, followed by a detailed order confirmation • Push notifications for every status change and a WhatsApp-to-order shortcut • Hindi-...

Necesito integrar un módulo de chat en tiempo real dentro de una aplicación móvil Android. El componente debe permitir: • Mensajería de texto instantánea con notificaciones push. • Mensajería de voz (grabación, envío y reproducción dentro del chat). • Transferencia de archivos (imágenes, PDF y otros formatos comunes), mostrando barra de progreso. Puedo acoplar el chat a una app existente o partir de un proyecto nuevo; el código ha de quedar bien documentado y estructurado en Kotlin o Java, usando Firebase, WebSocket o la tecnología que consideres óptima para asegurar baja latencia y cifrado de extremo a extremo. Entregarás el código fuente completo, instrucciones...

I’m building a dedicated social networking app for Android and need a developer who can take it from concept to a polished release-ready build. The goal is to let users connect, share updates, and chat in real time within a clean, modern interface. Key requirements • Native Android (Kotlin or Java) with a modular, well-commented codebase. • Core features: secure sign-up/login, personal profiles with avatars and bio, an activity feed for posts (text, images, short video), likes/comments, and one-to-one messaging with push notifications. • Smooth, responsive UI that follows current Material Design guidelines. • Basic analytics hooks (Firebase or similar) for user engagement tracking. • Simple server side or BaaS integration for authentication, data sto...

I’m looking for a skilled Android developer to transform my concept, “1000askia,” into a fully functional mobile app. The first release focuses on a clean, stable build with in-app purchases implemented through Google Play Billing. Here’s what I need: • A native Android application written in Kotlin or Java, compatible with the current Android SDK. • Seamless in-app purchase flow (subscriptions or one-time unlocks, depending on what you recommend for best user experience). • A lightweight dashboard or admin configuration so I can add or adjust purchasable content without digging into code. • Polished UI that matches material design guidelines; wireframes or a quick prototype are available on request. • Source code, build instruc...

I am building an Android-only mobile application I call “Sepuluh Poin.” The core idea is already drafted, but I need a seasoned Android developer to turn the concept into a full, production-ready app. Scope of work • Translate my functional notes for “Sepuluh Poin” into clear user flows and wireframes (I will share the sketches once we start). • Build the complete Android app in Android Studio, using Kotlin (Java is acceptable if you have strong justification). • Implement a clean, modern UI that follows Material Design guidelines. • Connect front-end screens to the required local or cloud-based data layer; I am open to Firebase or a lightweight REST API—let’s decide together during kickoff. • Package, sign, and deli...

I want a clean, intuitive mobile application that lets people record or choose professional-grade videos on their phone and upload them straight to the cloud. The build must run smoothly on both Android and iOS, with a single code-base preferred for easier maintenance. Key flow • The user pays Rs. 10 to download the app from Google Play (I’ll set the same price on the App Store). • After a quick sign-up, each user gets a personal profile page that lists their uploaded clips. • Viewers can watch a video, tap Like, or leave a comment. • All uploads should stream reliably on common mobile data speeds; feel free to suggest a cost-efficient storage/CDN combo such as AWS S3 + CloudFront or Firebase. Under the hood – Modern cross-platform stack such a...

I’m looking for a clean, reliable way to bring auto-aim assistance into the Android version of Miniclip’s 8 Ball Pool. The core idea is to have the app read the current table layout, draw predictive shot lines on top of the game, and optionally set cue power so that every stroke feels natural, not robotic. Here’s exactly what I need: • Smooth aiming – the guideline should glide into position without sudden jumps. • Predictive shot lines – include cushion rebounds so I can plan complex bank shots. • Cue power control – let me pre-set or auto-adjust the stroke strength for consistent breaks and tricky combos. Acceptance will be simple: if I can install the apk (or sideloaded module/overlay), launch 8 Ball Pool on my Android phone, an...

I am building an Android-only mobile application I call “Sepuluh Poin.” The core idea is already drafted, but I need a seasoned Android developer to turn the concept into a full, production-ready app. Scope of work • Translate my functional notes for “Sepuluh Poin” into clear user flows and wireframes (I will share the sketches once we start). • Build the complete Android app in Android Studio, using Kotlin (Java is acceptable if you have strong justification). • Implement a clean, modern UI that follows Material Design guidelines. • Connect front-end screens to the required local or cloud-based data layer; I am open to Firebase or a lightweight REST API—let’s decide together during kickoff. • Package, sign, and deli...

I want to take my neighbourhood kirana store fully digital with a two-part solution: a customer-facing Android app and a browser-based back office, both controlled through tiered roles (admin and super-admin). Android app Customers must be able to browse the entire catalogue through a fast product listing and search module, place and manage their orders inside the app, then leave customer reviews once an order is delivered. The flow should feel as smooth as any modern e-commerce experience. Web application Internally, the web portal will let us update stock in real time, handle individual customer accounts with their complete order history, and review sales analytics to spot trends and slow-moving items. Admin & super-admin roles Store admins need dashboards for user managemen...

Je souhaite faire développer une application mobile Android centrée sur l’intégration des médias sociaux. L’idée est d’offrir aux utilisateurs un moyen simple de se connecter via leurs comptes existants (Facebook, Google, Twitter …) et de partager du contenu directement depuis l’app. Ce dont j’ai besoin : • Une première version fonctionnelle (APK) compatible avec les dernières versions d’Android. • Connexion et authentification OAuth avec les principales plateformes sociales. • Possibilité de publier, aimer et commenter du contenu partagé depuis l’application. • Code source clair, documenté, remis sur un dépôt Git. • Brè...

I need a developer who can take my concept for a music-therapy application and turn it into a polished product that runs smoothly on both iOS and Android. The core goal is simple: help users unwind and manage day-to-day stress through carefully curated sound. What the first release must do • Customized music playlists – users choose a mood (e.g., calm, focus, uplift) and instantly receive a tailored set of tracks that stream seamlessly or download for offline play. Beyond that anchor feature, the codebase and UI should be flexible enough for me to add items like guided meditations or sleep tracking later, so please bear future modules in mind when structuring architecture, navigation, and data models. I’m open to React Native, Flutter, Swift/Kotlin, or another approac...

I need a straightforward Android-only “DLC locker” whose core job is to let users create, view, edit, and delete their own profiles. The app will authenticate purely through the classic email-and-password flow; social log-ins or two-factor checks can stay out of scope for now. Here’s the flow I have in mind. A splash screen leads to a secure login / registration form, after which the user lands on a dashboard listing their saved profiles. From there they can add a new profile, tap to edit existing data, or wipe one entirely. A clean Material-style UI, clear navigation, and solid error handling are important to me. Deliverables • Full Android Studio project (Java or Kotlin) • APK for quick testing on a physical device • README outlining build steps a...

I’m building a straightforward voice-only calling app dedicated to Android. The core requirement is rock-solid one-to-one voice communication, so there’s no video feed or chat module to worry about—just clean, low-latency audio calls. Users will sign up and log in with phone-number verification (OTP/SMS). Once authenticated, they should see a simple contact list, tap a name, and place a call. Think of an experience as seamless as a standard dialer but inside its own sandboxed app. What I need from you: • Full Android Studio project (Kotlin or Java) with well-commented source code • Functional APK for testing on Android 10+ devices Acceptance: • Phone verification must complete within two steps and fail gracefully on bad codes • Voice connection ...

I have a catalogue of roughly 25 pharmaceutical companies, supplied as Excel sheets and individual PDFs, and I need a lightweight Android application that lets users type a query and instantly locate matching terms inside each product’s description. The project covers everything from converting the source files into a searchable local database through to publishing the finished APK on the Google Play Store under my developer account. Key requirements • Data import: read the Excel rows and PDF text, normalise them, and store them locally or on google sheet. • Core feature: free-text search that highlights occurrences inside the full description—not just by name or code. • Simple UI: a single search field, results list, and a detail screen that renders the ful...

I have a catalogue of roughly 25 pharmaceutical companies, supplied as Excel sheets and individual PDFs, and I need a lightweight Android application that lets users type a query and instantly locate matching terms inside each product’s description. The project covers everything from converting the source files into a searchable local database through to publishing the finished APK on the Google Play Store under my developer account. Key requirements • Data import: read the Excel rows and PDF text, normalise them, and store them locally or on google sheet. • Core feature: free-text search that highlights occurrences inside the full description—not just by name or code. • Simple UI: a single search field, results list, and a detail screen that renders the ful...

I am building a full-featured general job portal dedicated to Android users and need an experienced developer who can take the project from concept to Play Store launch. The app must serve three distinct user roles—job seekers, employers, and an admin—so the architecture has to be clean, secure, and scalable. Core flow • Job seekers create profiles, upload résumés, browse filtered vacancies, save searches, and apply in-app (file upload and in-app messaging included). • Employers register company accounts, post openings, manage candidate pipelines, and receive real-time application notifications. • An admin console (web-based or embedded) lets me moderate content, verify employers, and run basic analytics. I’m open to Java, Kotlin, or a...

I need a developer who can build a custom feature for Google’s Gboard that focuses squarely on improving the accuracy of its text-prediction engine. This isn’t a bug-fixing exercise or a simple integration; it is genuine feature development aimed at smarter, more context-aware suggestions while users type. Your job will start with analysing the existing prediction logic, then designing and implementing modifications—whether that means plugging in a new on-device language model, refining the current n-gram pipeline, or introducing lightweight neural-network tweaks that can run efficiently in real time. Kotlin or Java proficiency for the Android input-method framework is essential, and a solid grasp of NLP techniques, TensorFlow Lite (or similar), data handling, and privac...

I want to bring a new social media idea to life through a purpose-built Android application. This is a full application development project, so I need someone who can take the concept from blank screen to a polished, Play-Store-ready release. The core scope is native Android—Java or Kotlin is fine—covering everything a modern social platform needs: secure sign-up and login, user profiles, an endlessly scrolling feed, basic interactions such as likes or comments, plus real-time push notifications. If you’re comfortable setting up a lightweight backend as well (Firebase, Supabase, or another scalable option), that’s a bonus, though I’m open to your recommendations. Deliverables I expect: • Production APK ready for testing and release • Clean, wel...

I want an Android-based tool that helps me understand and optimize resource management in Rise of Kingdoms. The focus is on three intertwined tasks: • Resource tracking – a clear, real-time view of how much food, wood, stone, and gold I currently hold and how quickly each is produced or consumed. • March planning – an at-a-glance scheduler that shows when troops will return, how their movements affect resources, and the best moments to launch the next march. • Gameplay analytics – simple charts or tables that reveal patterns in my daily play so I can spot waste, downtime, or missed gathering opportunities. Core requirements 1. Native Android solution (Java or Kotlin). 2. Clean interface that sits over the game or works from exported game logs/screen...

I’m ready to turn an idea for a dedicated Android inventory application into a polished, production-ready APK. The entire focus is stock control: adding new items on the fly, adjusting quantities, and seeing what’s running low without having to open a laptop. Here’s the big picture I have in mind: • Fast, clean Material-styled interface • Item creation with barcode or QR scanning, photo upload, and basic categorisation • Real-time adjustments (add, remove, transfer) with an easy-to-read activity log • Search and filter by SKU, location, or custom tags • Low-stock push notifications and an optional daily summary • CSV / Excel import-export so I can bulk load or back up data at any time • Email or token-based sign-in that ...

My Android app is already about 80 % complete, written entirely in Kotlin, and I now need an experienced developer who can jump straight into a mature code-base without slowing down the momentum. The remaining work focuses on the in-app purchase flow, final bug squashing, and polishing the subscription experience. The payment gateway I have chosen is Google Play Store Billing (not PayPal, Stripe, or Square), so you must be comfortable with the latest Google Play Billing Library, its test environment, and Play Console configuration. Here is what still needs doing: • Payment integration – wire in Google Play Billing for one-time purchases and subscriptions, make sure acknowledgements and server-side verification are handled. • Bug resolution – there are a handfu...

I’m ready to turn my lesson-marketplace concept into a working MVP. Think Preply, but with an Airbnb-style map so learners can find tutors who teach in person as well as online. The product has to feel fast and reliable on Android and on the web from day one. Core scope • Map-based discovery: users browse a live map to spot tutors near them, with distance, price and subject filters baked in. • Subject coverage: Languages, Music and Academic subjects must appear as top-level categories so tutors can label themselves and students can refine searches instantly. • Dual delivery modes: every lesson listing lets the tutor mark “online”, “in person” or both, and that flag controls whether the profile appears in the geolocation layer. • Ac...

I am architecting a zero-knowledge communications platform and now need a mobile engineer or small team to turn the design into working iOS and Android apps. The goal is absolute privacy: plaintext must never touch persistent memory, messages evaporate on schedule, and media flows peer-to-peer once devices connect. Core security foundations • AES-256 for all symmetric payload encryption • Two-factor authentication (2FA) as the sole login path • No metadata retention beyond what each device locally encrypts Key functional modules to build 1. Encrypted keystroke-level messenger that buffers nothing unencrypted. 2. Timed destruction logic wiping sender, recipient, server cache, and backups in sync. 3. State signalling showing Delivered / Read / Destroyed without exposing iden...

I need an Android application that lets users talk to each other in real time. The experience should feel as close to a normal phone call as possible, with rock-solid, low-latency audio that holds up even on average mobile connections. One crucial requirement is support for group calls; several participants must be able to join the same room, speak freely, and hear one another without noticeable lag or echo. If you have already built something similar—or, as I mentioned, completed a “brikri” project before—please let me know, because proven experience with live voice stacks will save both of us time. Whether you prefer WebRTC, Agora, Twilio Voice, Jitsi, or another VOIP backbone, I am open to whichever engine delivers the most stable performance on Android. Just bu...

Both my School Management and Gym Management Android apps are already live on the Play Store, with real users relying on them every day. I now need an experienced Android developer who can jump in immediately, study the existing codebase, and keep the releases moving without interruption. You will be responsible for squashing any production bugs as they appear, refining the UI for smoother user journeys, and adding new feature requests that come from school administrators, teachers, gym owners, and members. The current stack is standard Android SDK with Kotlin and a sprinkling of Java, Retrofit-based REST calls, Firebase push notifications, and Room for local persistence, all under version control in Git. If you are comfortable working in that environment and can turn around fixes or new ...

Necesito desarrollar una app de citas que funcione de forma nativa tanto en iOS como en Android. El único módulo imprescindible en esta primera fase es un sistema de emparejamiento que utilice un algoritmo personalizado; no busco incorporar mensajería interna ni perfiles de usuario por ahora, así que el enfoque estará 100 % en la lógica de match. Qué espero recibir • Código fuente limpio y documentado para ambas plataformas • Implementación del algoritmo de emparejamiento, incluyendo variables configurables y registro de métricas básicas (aciertos, rechazos, etc.) • Instrucciones claras para compilar y probar la app en Xcode y Android Studio • Una breve guía técnica don...

I need an experienced Android developer to build an Office Manager app for personal use. The app should include Login & App Lock, To-Do Manager, Location-wise Accounts Ledger, Vendor Management, Purchase Management, Notesheet Tracking, Reminders, Reports, Backup & Restore, and a modern Material Design UI. The app should be developed in Kotlin with Jetpack Compose and Room Database. The source code and full ownership must be transferred to me after project completion.

save screenshots in background in android studio without any notification or any disturbance, must be using java, not kotlin