Kotlin Jobs

I need a streamlined Android application that can jump into a Savage Survival in-game auction at the last possible moment, place my pre-set bid automatically, and confirm the win. Here is what matters most to me: • The app runs exclusively on Android and works smoothly on recent versions of the OS. • I simply enter the item ID, my maximum bid, and the seconds-before-close I want the snipe to fire; the app handles the rest in the background. • A concise activity log records each attempt, showing the exact time the bid was sent and the server response so I can verify performance. • Authentication to the Savage Survival auction endpoint should be handled securely, storing tokens or credentials with proper encryption. • If an auction ends early or a network...

Saya ingin menghadirkan sebuah permainan teka-teki di Android yang mampu menarik pemain lewat sistem hadiah dalam game. Fokus utama proyek ini adalah: • Gameplay: puzzle sederhana namun adiktif dengan level bertahap yang terus menantang pemain. • Hadiah dalam game: poin, koin, atau voucher yang terkumpul saat pemain menyelesaikan level dengan baik. Mekanisme klaim hadiah harus aman dan mudah dioperasikan. • Monetisasi: integrasi iklan (interstitial / rewarded video) sehingga hadiah dalam game dapat didanai dari pendapatan iklan. Ruang lingkup yang saya butuhkan mencakup: 1. Konsep inti gameplay dan wireframe dasar. 2. Pengembangan aplikasi Android (Kotlin / Unity / Godot—gunakan stack yang Anda kuasai). 3. Dashboard sederhana untuk mengatur nilai hadiah, ...

I’m building a single Android application that handles every step of small-business billing in one place. The core of the project is an all-in-one module that lets me: • generate professional invoices on the phone, • process customer payments in-app, and • track expenses in real time. Beyond those essentials, I also need the app to exchange data smoothly with my existing accounting software and CRM so client records, invoices, and payment statuses stay perfectly in sync. If a standard connector is not available, a lightweight REST integration is acceptable as long as it preserves data accuracy and runs securely. The finished APK (plus full source in Kotlin or Java) should: • run cleanly on current Android versions down to API 24, • store data locall...

I need a production-ready, cross-platform social and communication app built with React Native for both Android and iOS. The very first release must nail short-form video, real-time messaging, and rich user profiles; on top of that, I also expect an integrated ads network for creators and brands plus a secure web-based admin panel for moderation and analytics. Frontend React Native will drive the mobile clients, with native modules where raw performance is essential. For video, FFmpeg/ExoPlayer/AVFoundation are acceptable; messaging should ride on WebSockets or gRPC streams to keep latency low. Backend A microservice architecture in Go, Rust, or Elixir—whichever your team masters best—running on PostgreSQL (with Redis for caching and object storage for media) is required....

My REST-based backend is live and documented; what I now need is the Android and iOS front-end that brings it to users. The apps are for the employees of a cleaning company. The product is a straight-forward app with four core capabilities • Logged in Users can see their shift plan • Users are get notified when their plan changes. • Shift plan – a simple calendar-style screen that shows upcoming shifts pulled from the backend. Already finished shifts should also be shown. • Time stamp capture – one-tap recording of start/finish times sent to my existing endpoints User authentication is required (username/password). Once authenticated, every call must tunnel through the current API layer; no extra server work is needed from your side. Feel free to build wi...

I need a developer who can wire proper play / pause as well as previous-next buttons into my existing Android app so that they appear on the lock screen and in the pull-down notification shade (just under the Wi-Fi and other system icons). The media involved is music only—no video or podcast handling is necessary—so you can focus on a clean MediaSession implementation. The notification tab should let users control music playback directly; no extra settings tiles or album art tweaks are required, the default visual style is fine. My current build is already functional inside the app, I just haven’t been able to surface those controls outside it. All work must remain compatible from Android 8.0 upward. Please deliver: • Updated Kotlin/Java code (or clear patches) tha...

I’m looking for help turning my idea for an entertainment-focused Android app into a polished release on Google Play. The concept targets college students, so the experience needs to feel fresh, playful, and instantly engaging the moment it opens. Here’s what I already know and need: • Platform: strictly Android, built with current SDKs and fully compliant with the latest Google Play requirements. • Purpose: pure entertainment—think quick, stress-relieving fun rather than anything academic. How that fun takes shape is open to your creative input, but the end result should encourage daily use and easy word-of-mouth sharing across campuses. I’d like you to guide the full cycle: UI/UX mock-ups, iterative development (Kotlin or Java—your call), basic...

I’m building a city-focused marketplace that matches Saharanpur residents with trusted electricians, plumbers, mechanics, AC technicians and carpenters. The scope is strictly Android for this first release, and every user—customers and providers alike—will sign in with OTP only. What I need built: • Customer app – browse services by location, book a job, track status, pay through UPI or hand cash on completion, then rate and review. • Service-provider app – accept or reject jobs, live-track routes, manage profiles, view earnings and history, receive push alerts. • Web-based admin panel – full CRUD over users, categories and bookings, dispute resolution, payout reports, notification broadcast. Core modules include secure OTP authen...

I’m looking for a developer who can build a social-networking app exclusively for Android. The core idea is to let users create profiles, connect with friends, share posts, and receive real-time notifications—similar to the essentials you’d find on today’s popular social platforms. Key objectives • Clean, intuitive UI that aligns with modern Material Design guidelines. • User account creation and secure sign-in (email, Google, or phone). • Feed where users can post text, images, and short videos, with like/comment features. • Push notifications for follows, comments, and messages. • Basic in-app messaging between connected users. • Scalable backend with user data stored securely (I’m open to Firebase or a comparable clo...

Freelenchar will be a full-featured mobile marketplace delivered on both iOS and Android. The entire focus is an e-commerce experience, so the build has to feel lightning-fast from product discovery right through to checkout. The checkout flow is critical: I need a secure payment gateway that connects directly with our partner bank so customers can pay without being bounced to a browser window. PCI-compliant handling of card data, tokenisation, and clear error messaging must all be in place before launch. Beyond payments, a smooth sign-up, login and profile area, plus an easily searchable product catalogue, would make the app far more compelling, so please keep flexibility for those modules in the architecture even if we phase them in later. Core deliverable • A production-...

Saya ingin membangun sebuah aplikasi jejaring sosial khusus Android. Pengguna harus bisa membuat profil, berbagi konten (teks, foto, atau video pendek), mengikuti akun lain, berkomentar, serta berkirim pesan langsung. Ruang lingkup yang saya butuhkan: • Desain UI/UX bersih dengan Material Design • Registrasi & login aman (email, Google, atau nomor ponsel) • Feed real-time dengan infinite scroll • Halaman profil pribadi dan publik • Fitur follow/unfollow, like, komentar • Chat satu-lawan-satu dan notifikasi push • Dashboard admin sederhana untuk moderasi • Backend cloud skalabel (mis. Firebase, Supabase, atau setara) Deliverable akhir: 1. Kode sumber lengkap proyek Android Studio (Kotlin/Java) 2. APK siap diuji 3. Dokumentasi...

I need a new Android mobile app built from the ground up. The core idea is clear, but I am looking for guidance on structuring the features, choosing the right tech stack, and bringing the entire concept to life on the Google Play ecosystem. Here’s what I expect: • A polished, fully functional APK ready for submission to the Play Store. • Clean, well-documented code so future updates are straightforward. • A simple, modern UI that follows current Android design guidelines. • Basic onboarding and an in-app help screen to ensure users instantly see value. I’m flexible on development tools—Kotlin or Java is fine as long as the result performs smoothly across the latest Android versions. Let me know which libraries or frameworks you recommend for...

I’m putting together a simple yet reliable survey form that will run natively on Android phones. All questions will be straightforward text-input fields, so users can type their responses freely rather than tapping radio buttons or sliders. I also need each respondent to be able to attach a file—most often a photo or PDF—before submitting the form. A clean Material-style interface, smooth validation, and quick submission feedback are important to me; lag or crashes are not an option. The finished work should include both the installable APK for immediate testing and the full Android Studio source so I can extend the question set later if needed. If you prefer Kotlin or Java, either way works—just keep the code well-commented. Once everything is running, I’ll...

My Android app needs a quick but thorough tune-up focused entirely on the login screen. Right now users run into three pain points: they see an “incorrect credentials” message even when the details are right, the app occasionally crashes as soon as they hit “Sign In,” and when it does work the response time feels sluggish. All of these issues sit squarely in the UI/UX layer, so I’m looking for someone who can dive into the existing Kotlin code (Android Studio Arctic Fox and up), trace the flow between the form, the ViewModel and the API call, then deliver a clean, stable and responsive experience. What I expect once you’re done: • Correct validation so legitimate users get through on the first try, with clear feedback when credentials are truly w...

I’m ready to turn my concept, “Raghunathpur Karari,” into a full-featured Android social networking app. The goal is to create a space where users can connect, share updates, and build community around local interests. I need an experienced Android developer who can take the project from UI/UX planning through coding, testing, and final Play Store submission. Key requirements • Native Android build (Kotlin or Java) with modern Android SDK best practices. • Core social features: secure sign-up/login, personal profiles, post creation (text, photo, short video), likes/comments, and real-time notifications. • Clean, scalable Firebase or comparable backend for user auth, data storage, and push notifications. • Intuitive, lightweight interface opt...

I am launching an Online Rental Boyfriend service and need a dedicated Android app built from the ground up. For this first release the absolute priority is a smooth, secure real-time chat system that lets clients and their chosen companions message one another without friction. Please focus your proposal on: • Selecting the right chat framework or custom WebSocket solution for Android. • Building the screens, navigation, and user flows needed so a client can open the app, select a companion, and start chatting immediately. • Implementing push notifications and basic moderation / reporting hooks to keep conversations safe. Anything beyond chat—such as full profile management or an in-app booking calendar—can remain stubbed or marked for later phases, ...

Tôi đang tìm một freelancer có kinh nghiệm để xây dựng ứng dụng di động chạy trên Android. Ý tưởng tổng quan và nội dung chức năng tôi sẽ cung cấp sau khi trao đổi, vì vậy tôi cần người có khả năng: • Phân tích yêu cầu và đề xuất cấu trúc tính năng phù hợp • Thiết kế giao diện người dùng đơn giản, thân thiện • Lập trình, kiểm thử cơ bản và tối ưu hiệu năng • Bàn giao mã nguồn hoàn chỉnh cùng file APK cài đặt Khi gửi hồ sơ, vui lòng tập trung nêu rõ kinh nghiệm liên quan đến phát triển Android—các dự án đã làm, cô...

I run a small retail business and need an Android application that works much like Khatabook but focuses on one thing: nudging customers to clear their pending balances. Each customer’s outstanding amount should be visible at a glance, and the app must let me fire off polite reminders by SMS, WhatsApp, or push notification on a schedule I choose. Core flow • I create a customer entry, add or edit their balance, and the app instantly updates a running ledger. • When a balance crosses a date I set, the system sends an automatic reminder and logs what went out. • If the customer pays, I record the payment (manually or through the integrated gateway) and the balance adjusts. Essential features • Android-only build, coded in Kotlin or Flutter. • Secure...

I’m kicking off the development of a full-featured travel application that must run natively on both iOS and Android from day one. The first release will centre on a robust booking system, allowing users to search, compare and securely reserve hotels and flights inside a single, streamlined flow. Core scope • Cross-platform architecture (React Native, Flutter or a comparable solution) compiled to clean Swift and Kotlin code, ensuring App Store and Google Play approval. • End-to-end hotel reservation and flight booking modules, each connected to live inventory APIs (GDS or OTA feeds that you will help me shortlist). • Secure account creation with social sign-in, payment gateway integration (Apple Pay, Google Pay, major cards), and automated email / push confirm...

I need an end-to-end telecalling solution made up of an Android app for my callers and a web dashboard for supervisors. The app must handle every step of a call session—dialing, recording the conversation, and instantly linking the recording to the right customer profile. While the caller works, customer information should be visible and editable in real time, and any updates must sync immediately with the web panel. Key functions I expect from day one are call recording, integrated customer-information management, and real-time analytics that show live call status and daily performance numbers. On top of that, I also want automated call scheduling so tomorrow’s call list is ready without manual effort, in-app messaging so supervisors can coach callers without switching tools,...

I need a full-featured e-commerce mobile application built for both iOS and Android. The core goal is to give shoppers a smooth, intuitive way to browse products, add items to a cart, check out securely, and follow their orders from purchase to delivery—all inside a fast, modern native app. I will supply branding assets, product data, and API access to the existing back-end. You will handle the end-to-end mobile build: UI/UX design that respects Apple and Google guidelines, efficient coding in Swift/SwiftUI and Kotlin (or a proven cross-platform framework if you can demonstrate equal performance), and integration of the payment gateway, push notifications, and basic analytics. Deliverables: • Release-ready iOS and Android builds uploaded to TestFlight and the Play Console &bul...

I need a small Android-only solution that keeps a field employee’s GPS location streaming in real time for a full 10-hour shift. The phone should start tracking with a single tap, run quietly in the background, and push live latitude-longitude data to an endpoint I can inspect as it happens—no cell-tower or Wi-Fi fallbacks, pure GPS. Please build a lightweight app or service that: • Requests the necessary foreground/background location permissions once and keeps them alive. • Publishes location updates continuously (no noticeable gaps) for up to 10 hours without killing the battery or losing accuracy. • Lets me specify the update frequency before deployment—default can be every 5–10 seconds. • Saves a local log as a safeguard if the conne...

I need an experienced Android developer who can turn a fresh concept into a polished application whose primary purpose is to earn money from day one. The platform is strictly Android, so everything—from the architecture you choose to the UI patterns—should follow current Android best practices and Google Play guidelines. My main focus is direct revenue generation. I’m open to any combination of in-app purchases, subscriptions, rewarded ads, or other monetisation models you feel confident implementing. What matters most is a clean, maintainable code-base, fast load times, and a friction-free user experience that keeps people engaged and spending. Deliverables I expect • Full source code (Kotlin or Java) with clear documentation • Signed, release-ready APK/A...

I want to refresh my Freelancer.com profile with six separate portfolio pieces, each centred on a different mobile-app tech stack. The stacks that must be featured are Java, Kotlin, React-Native, Expo, Cordova and Swift (Flutter may appear as a supporting framework where it makes sense, but the six listed stacks lead the narrative). Every piece must follow a clean, professional look—consistent typography, balanced whitespace and a restrained colour palette—yet still feel unique to the specific technology showcased. Within each portfolio item I need three core sections: • A concise project description that explains what the app does and why that language or framework was chosen. • A short, genuine client testimonial that reinforces the quality of the work. •...

I need an Android application that silently blocks access to Facebook and Instagram on the device while it runs in the background. Alongside the blocking feature, the app must capture complete call information (number, direction, duration, timestamp), all SMS details, and automatically record every call. Because I also want visibility into overall phone use, the app should maintain a detailed usage log for every other installed application—launch time, total foreground minutes, and, if available, screen-on duration—then bundle these logs with the call/SMS data. All call recordings have to be pushed to a cloud server I can configure (Firebase, S3, or a simple REST endpoint—whichever you prefer, as long as I can later swap credentials). Logs can follow the same route or b...

I already have an Android Device Policy Controller that locks financed handsets when an EMI is missed, plus a small web dashboard that lets the lending team provision devices and trigger unlocks. The current build is unstable on Android 13, the UI feels dated, and the payment workflow is tied to a gateway we no longer use. I need the entire solution rebuilt and hardened. Core behaviours that must work flawlessly: • Lock the phone the moment a scheduled payment fails. • Allow me to whitelist only basic apps (dialer, messages, payment app) while the device is locked. • Push automatic reminders before the due date and after a failure until settlement. • Capture an e-mandate (eNACH/UPI AutoPay) during onboarding so future EMIs run without user action. The admin portal sho...

I already have an Android Device Policy Controller that locks financed handsets when an EMI is missed, plus a small web dashboard that lets the lending team provision devices and trigger unlocks. The current build is unstable on Android 13, the UI feels dated, and the payment workflow is tied to a gateway we no longer use. I need the entire solution rebuilt and hardened. Core behaviours that must work flawlessly: • Lock the phone the moment a scheduled payment fails. • Allow me to whitelist only basic apps (dialer, messages, payment app) while the device is locked. • Push automatic reminders before the due date and after a failure until settlement. • Capture an e-mandate (eNACH/UPI AutoPay) during onboarding so future EMIs run without user action. The admin port...

I need APP developer who can create from Figma artwork - Driver APP front-end Design & its front-end code which can be ready to use or integrate to CodeIgniter 4 PHP framework. Basic Info & Settings for the App Development a. SET - APP Name – Yolo Driver | SKU – YRLGROUP1 | BUNDLE NAME – b. Technology to be used – Flutter - Dart – Kotlin – Swift – firebase – CI4 – PHP framework - API c. Provide Full Source Code + Integrate with Live Server & App Should be able to work on iOS & Android both type of devices. d. All APIs & Controller files store under Controller folders. PATH = app/Controller/YoloDriverAPP/… e. Name - Driver APP Controller file name = f. All css or Splash Screen Design related files –...

I maintain the “MediFind – Chemist App” on Google Play and have just received the policy notice that it must target the latest Android version ahead of the 31 Aug 2026 deadline. Right now the project still declares targetSdkVersion “API 36 or Higher”, yet Play Console is flagging the bundle because the compiled artefact is older. ****And Needs to add sound in one Place. Your task is to bring the entire codebase up to the current target API level accepted by Google Play, upgrade Gradle tooling, and resolve any breaking changes in code or third-party dependencies. The code is a standard Android Studio project (Java & a bit of Kotlin), published as an AAB; minSdkVersion must stay exactly as it is so existing users are not cut off. Key outcomes I need fro...

My Android app has just been rejected by Google Play because it no longer targets the required API level, and I am also running into Google Cloud Storage failures in production. I need someone who can jump into the existing codebase, raise the targetSdkVersion to meet the latest Play Console requirements, resolve every compile or dependency conflict that appears, and then straighten out the cloud-storage layer so uploads and downloads work reliably again. The project will be complete when: • The app builds in Android Studio (Kotlin / Java) with the new API level and no deprecation or permission warnings that block release. • A release build is accepted by the Google Play Console without policy or API‐level errors. • All storage operations succeed against my current GC...

I need an Android-only application that can forecast the multiplier curve in 1xbet’s Crash game with convincing accuracy. Two core capabilities matter to me: • Real-time predictions that update before each round starts, giving the user a clear multiplier target or “safe cash-out” point. • A back-end layer that continuously absorbs past Crash rounds so the model can refine itself through historical data analysis. You are free to pick the stack—Kotlin, Java, or a cross-platform engine such as Flutter—so long as the final APK runs smoothly on current Android versions and the source code is clean, well-documented, and easy to extend. I will supply sample data streams; you handle everything else: data ingestion, model training, on-device inference,...

I’m creating “Crois moi c'est possible”, a brand-new social networking experience that will live exclusively on Android. The goal is to give users an intuitive space to connect, share photos and short videos, chat in real time, and receive instant push notifications—everything they expect from a modern community app, wrapped in a clean Material Design interface. You’ll take the lead on end-to-end Android development, so solid Kotlin or Java skills are essential. A cloud back-end (Firebase, Supabase, or a solution you recommend) will handle authentication, media storage, and real-time data. I’m keen on scalable architecture, readable code, and smooth UI/UX transitions; if you excel at Jetpack Compose, even better. Deliverables • Fully functi...

I’m ready to turn my concept for a dedicated social-media Android app into a fully functioning product. The project is strictly mobile app development for the Android platform—no iOS component is planned at this stage—so your experience with Kotlin or Java, Android Studio, Firebase (or an equivalent real-time back end), and clean Material Design guidelines will be critical. Core idea The app should allow users to create profiles, share posts (text, images, short video), follow others, and receive real-time notifications. Think lightweight, fast, and intuitive rather than a bloated “all-in-one” network. A smooth onboarding flow, secure authentication, and an easily scrollable home feed are my immediate priorities; messaging and advanced discovery features can ...

I need an intermediate-level mobile application created from scratch for both iOS and Android. The core objective is to hand me a fully functional, well-structured codebase along with the compiled builds ready to submit to the App Store and Google Play. You are free to choose the most efficient toolchain—whether that is Flutter, React Native, Swift + Kotlin, or another framework—as long as performance and maintainability remain a priority. I will supply the UI wireframes and any required brand assets; you will turn those into a polished, responsive interface, wire up the back-end endpoints I provide, and ensure the finished product passes standard QA checks on real devices for each platform. By project close I expect the complete source code, build instructions, and a brief...

Build a full-featured voice chat application that runs smoothly on Android and ships with the complete source code. Core features to implement • Phone-number verification as the only login method, followed by secure session handling. • User profiles that can be expanded later (start with photo, name, bio, interests). • Public chat rooms with high-quality, low-latency voice. • One-to-one private voice calls plus real-time text messaging. • Push notifications for invites, messages, follow requests, wallet events, and admin broadcasts. • In-app wallet able to hold balances, process top-ups, and trigger withdrawal requests; history must be visible to the user and editable from the back office. • Web-based admin panel to manage users, rooms, trans...

The project involves building a native Android application from the ground up. I already clarified that the scope is specifically Mobile app development and, at this stage, I want to target Android only. Key needs • A clean, intuitive user interface that follows current Android design guidelines. • Robust, well-structured Kotlin or Java code (whichever you are most comfortable with) that is easy to maintain and extend. • All standard mobile essentials: responsive layouts for multiple screen sizes, offline handling where appropriate, and thoughtful permission management. • End-to-end support—planning, UI/UX, coding, testing, and a guided hand-off for Google Play deployment. Deliverables 1. Full Android Studio project with readable source code. 2. Sign...

I’m planning a clean, intuitive navigation app that runs natively on both iOS and Android. The core experience should be the familiar 2-D map interface with smooth pinch-zoom and tilt, focused on one key feature: reliable turn-by-turn directions. My priority is accuracy and speed. When a user selects a destination, the route should calculate quickly, announce upcoming turns clearly (voice + on-screen), and recalculate instantly if they deviate. I’m happy to leverage MapKit, Google Maps SDK, Mapbox, or another solid framework—whichever you feel will give the best licensing terms and performance on both platforms. While real-time traffic and fully offline map packs aren’t required for the first release, I’d like the architecture to leave room for those modul...

Saya ingin membuat sebuah aplikasi mobile khusus untuk platform Android. Fokus utama tahap awal ini adalah mendapatkan versi dasar yang sudah bisa dijalankan agar ide aplikasi dapat segera diuji. Lingkup kerja yang saya harapkan: • Menyusun arsitektur proyek di Android Studio (Java atau Kotlin). • Mendesain wireframe sederhana untuk alur layar utama. • Membangun prototipe fungsional dengan setidaknya dua layar yang saling terhubung. • Menyiapkan dokumentasi singkat tentang struktur kode dan langkah build + install ke perangkat. Harap lampirkan file source code lengkap, APK debug, dan panduan setup singkat saat pengiriman.

Saya membutuhkan seorang programmer mobile yang dapat membangun aplikasi Android dari awal. Fokus utama saya adalah: • Merancang antarmuka pengguna yang intuitif dan responsif sesuai panduan Material Design. • Membangun fungsi inti (login, database lokal / remote, dan notifikasi push). • Mengintegrasikan API eksternal yang akan saya sediakan. • Menyiapkan build release, file APK, dan dokumentasi ringkas agar mudah dipublikasikan ke Google Play. Kriteria keberhasilan: aplikasi berjalan lancar di perangkat Android versi terbaru, kode bersih dan terstruktur (Kotlin atau Java), serta disertai panduan pemasangan singkat. Bila Anda memiliki portofolio proyek Android serupa, sertakan tautannya agar saya dapat meninjau kualitas kerja Anda. Saya siap berdiskusi menge...

I need a single Android application that combines two core utilities: an efficient memory optimizer and an antivirus module. On the cleaning side, the app should intelligently free RAM, close unnecessary background processes, and provide clear before-and-after stats so users see how much memory was reclaimed. The process must be quick, unobtrusive, and light on battery. For safety, I want a built-in antivirus engine offering real-time scanning and automatic definition updates. As soon as a new file is downloaded, installed, or modified, it should be checked against the latest signatures and heuristics without noticeable lag. Updates to the virus database have to run silently in the background over Wi-Fi or mobile data, with fallback scheduling if the network is unavailable. I’d ...