Kotlin Jobs

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 have two fully-built mobile apps—one Android, one iOS—ready for release. I simply need a developer who knows the ins and outs of Play Console and App Store Connect to get them live. Before submission, the Privacy Policy and Terms & Conditions links inside each build must be updated to the new URLs I will provide. You’ll receive the final APK, AAB, and iOS archive along with access to my developer accounts, screenshots, descriptions, and store-listing text. From there, I’m counting on you to: • Insert the new policy URLs in both builds • Create the production listings, fill out all compliance forms, and upload the builds • Handle any store-review feedback until both apps are approved and publicly visible The task is considered complete onc...

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 ...

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

I need a straightforward Android application that lets a user record daily expenses and keep an eye on their spending habits over time. Core workflow is simple: the user adds an expense, assigns one of five fixed categories (Food, Transport, Shopping, Bills, Other), and can later update or remove that record whenever needed. Every entry is stored locally with Room/SQLite so everything works offline. The interface can stick with the default Android UI components; polished visuals are welcome, but I do not require a full-blown Material makeover. What matters is a clean layout, dark-mode support, and snappy navigation between the main screens: • Dashboard – an overview that totals weekly and monthly spend, plus a running balance. • Detail list – searchable and filter...

I’m building a productivity-focused mobile app for Android and need a developer who can take it from concept sketches to a polished Play Store release. The goal is to give users an intuitive way to organise daily tasks, set reminders and monitor their progress, all while keeping the interface fast and clutter-free. You’ll handle the full Android stack—clean, well-documented Kotlin (or Java) code, Material-compliant UI, local data storage and cloud sync hooks so the app is ready for future integrations. I’ll provide wireframes, feature priorities and branding assets; you translate them into responsive layouts, implement the core logic, connect any required REST endpoints and set up push notifications. Deliverables: • Complete Android Studio project with readab...

I’m looking to hire a developer who can build a social-networking Android app from the ground up. I have the core concept, feature list, and some rough wireframes ready; what I need now is a functional prototype that looks polished and runs smoothly on current Android devices. Key objectives: • User onboarding via email, Google, or Facebook • Real-time feed where users can post text, photos, and short videos • Like, comment, and follow mechanics similar to mainstream social apps • Push notifications for mentions and new followers • Basic profile editing with avatar uploads • Simple admin panel for user moderation and content flagging I value clean, well-documented Kotlin or Java code and adherence to Android design guidelines. If you can also...

I’m planning a new utility-style Android application and want to team up with a developer who can turn the concept into a polished product. The goal is a single code-base that runs smoothly on smartphones, tablets, and popular wearable devices. Scope • Shape the core feature set with me from early wireframes through a functional MVP. • Build clean, maintainable Kotlin/Java code that follows current Android best practices, Material Design, and responsive-layout guidelines. • Handle Play Store preparation—package signing, versioning, and listing assets. • Set up a lightweight CI/CD flow (GitHub Actions or similar) so future iterations ship quickly. • Provide basic analytics hooks and crash reporting for post-launch insight. What I’ll suppl...

Android APK Development Requirement – Auto Ride Accept App (Rapido Style) Project Overview Need an Android application for drivers to manually accept ride information based on user preferences. The app is subscription-based with an Admin Panel. Platform - Android APK - Admin Web Panel - Cloud Database - Push Notifications User Features Login - Mobile Number OTP Login - Profile Management - Logout Subscription Plans - 1 Day - 7 Days - 30 Days - 3 Months - 6 Months - 12 Months Only active subscribers can access ride alerts. Ride Filters - Minimum Ride Amount - Maximum Ride Amount - Ride Type Selection - Cab Economy - Cab Premium - Cab XL - Area Selection using PIN Code Master - Multiple PIN Codes Selection - Save Filters - Ride History Ride Alerts - Instant Ride Not...

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’m building an Android application that must verify users through SMS-based one-time passwords. I already have the UI in place; what I need is a clean, reusable module that will: • Trigger an SMS-OTP request via a lightweight REST API you create (any language or framework you’re comfortable with). • Auto-read the incoming OTP on the device using Google’s SMS Retriever/User Consent API so the user never has to type it. • Enforce a resend option (configurable delay), show a visible countdown timer while the code is valid, and lock the flow after a defined number of failed attempts. Deliverables: 1. Android source (Kotlin or Java) wrapped as a library or clearly separated package. 2. Server-side endpoint(s) that generate and dispatch the SMS, plus s...

I want to launch a dedicated Android application that lets me sell my photographs directly to users. The core flow is simple: visitors browse a curated gallery, create or log in to their account, preview and lightly edit any image inside the app, then pay and download the final file. Key features I need live in the first release: • User accounts with secure sign-up, social or email login, and a basic profile page • Built-in photo editing tools—crop, rotate, filters, and simple adjustments so customers can personalise images before purchase • Full payment-gateway integration (Stripe is my preferred choice, though I’m open to PayPal or another reliable option you recommend) for one-off photo purchases Deliverables I expect: 1. Production-ready APK plus al...

I’m ready to move an Android-only social networking app from concept to a functional, polished release and I need a developer who can keep momentum high while communicating clearly along the way. Core scope • Build the full Android application, including all front-end screens, user authentication, real-time feed, profile management, push notifications and basic settings. • Write clean, well-documented Kotlin or Java code that can be handed over seamlessly. • Connect to the back-end APIs that I will provide (REST/JSON) and handle local data caching for offline use. • Implement standard security best practices and follow the latest Android design guidelines so the UI feels familiar to users. Deliverables I’ll review 1. Interactive APK for itera...

The project revolves around building an educational Android application that acts as a “Personal Teacher” for users who want to learn Android-app concepts step by step. Think bite-sized lessons, short challenges, and quick feedback loops that make the phone feel like a private tutor. Core scope • Design and code a clean, modern Android native app (Kotlin or Java) that opens with a simple onboarding flow, then serves structured lessons on Android development fundamentals. • Integrate quizzes or mini-tests so learners can check understanding after each topic. • Track user progress locally and sync it to the cloud so they can pick up where they left off. Why location matters Face-to-face sessions will speed up architecture decisions, UI reviews, and peri...

Saya sedang mencari bantuan untuk mewujudkan sebuah aplikasi game di platform Android. Fokus utamanya adalah membangun mekanik permainan yang sederhana namun adiktif—cukup ringan untuk dijalankan di sebagian besar perangkat, tetapi tetap memiliki tampilan dan kontrol yang rapi. Lingkup kerja yang saya butuhkan meliputi: • Merancang konsep gameplay inti, alur level dasar, serta antarmuka pengguna simpel. • Membuat prototipe fungsional di Android Studio (Java atau Kotlin). • Mengintegrasikan elemen grafis 2D dasar—ikon, tombol, dan aset latar—serta efek suara singkat. • Menyiapkan pencatatan skor lokal dan layar “Game Over” yang dapat dibagikan (share intent). • Menguji aplikasi pada berbagai ukuran layar sebelum menyerahkan fil...

I’m building a focused text-management feature for a new mobile app and need an experienced developer to create the storage-and-retrieval layer that will sit behind the in-app clipboard. The goal is simple: every snippet a user copies inside the app on iOS or Android should be captured, stored efficiently, and surfaced instantly when they need it again. Here is what I’m after: • Seamless interception of copied text within the app, without breaking native clipboard behaviour on either platform. • A lightweight, structured store (SQLite, Core Data, Room, or a comparable mobile-friendly database) that keeps all clipboard entries indexed by timestamp and source. • Snappy retrieval APIs that return recent items in milliseconds, with optional filtering by keyword...

I need my current iOS-only productivity tool recreated for Android so both platforms behave identically. The iOS build already handles task management, real-time notifications, and seamless cloud sync; those three core modules must work on Android with the same UX flow, screens, and performance profile. No extra features are required—this is an exact replica, just written for Android. You’ll receive the iOS source, design assets, API documentation, and test accounts for our existing backend. Please follow current Android best practices, ideally in Kotlin within Android Studio, and wire notifications through Firebase Cloud Messaging to mirror the iOS push system. Deliverables • Complete, well-commented Android source code • A debug APK plus a release-ready, signe...