Java is a versatile, object-oriented programming language that is widely used for software development across various industries. Java Developers can help clients create anything from complex web applications to automated trading bots and mobile apps. With their advanced skills and knowledge, they can turn your vision into reality, providing you with tailored solutions that align with your business goals. Here are some recent projects that our expert Java Developers made real:

  • Developing custom GUIs for existing codebases
  • Creating encrypted, secure crypto apps
  • Designing cross-platform audio merging tools for mobile devices
  • Building sophisticated trading bots for the cryptocurrency market
  • Implementing open-source virtual machines in C
  • Collaborating as senior developers on large-scale Android projects
  • Solving server request errors for mobile applications
  • Running and optimizing code from Git repositories
  • Designing and implementing web services for seamless integration

Hiring Java Developers on Freelancer.com gives you access to a global pool of talented professionals who can deliver high-quality solutions tailored to your needs. Our platform makes it easy and convenient to find, hire, and collaborate with skilled Java experts from around the world. So why wait? Bring your ideas to life by posting your own project and hiring a Java Developer on Freelancer.com today!

从243,205个评价中,客户给我们的 Java Developers 打了4.9,共5星。
雇佣 Java Developers

Java is a versatile, object-oriented programming language that is widely used for software development across various industries. Java Developers can help clients create anything from complex web applications to automated trading bots and mobile apps. With their advanced skills and knowledge, they can turn your vision into reality, providing you with tailored solutions that align with your business goals. Here are some recent projects that our expert Java Developers made real:

  • Developing custom GUIs for existing codebases
  • Creating encrypted, secure crypto apps
  • Designing cross-platform audio merging tools for mobile devices
  • Building sophisticated trading bots for the cryptocurrency market
  • Implementing open-source virtual machines in C
  • Collaborating as senior developers on large-scale Android projects
  • Solving server request errors for mobile applications
  • Running and optimizing code from Git repositories
  • Designing and implementing web services for seamless integration

Hiring Java Developers on Freelancer.com gives you access to a global pool of talented professionals who can deliver high-quality solutions tailored to your needs. Our platform makes it easy and convenient to find, hire, and collaborate with skilled Java experts from around the world. So why wait? Bring your ideas to life by posting your own project and hiring a Java Developer on Freelancer.com today!

从243,205个评价中,客户给我们的 Java Developers 打了4.9,共5星。
雇佣 Java Developers

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    109 找到工作

    Led the design and development of a scalable, secure, cloud-native referral management SaaS platform connecting job seekers, professional referrers, and recruiters. Architected end-to-end modern authentication flows using OAuth2 SSO (Google/LinkedIn), JWT stateless sessions with secure refresh token rotation, and fine-grained RBAC for API access protection. Designed a fully serverless AWS backend leveraging DynamoDB for scalable NoSQL persistence, S3 for file and resume storage, SES for email delivery, SNS for SMS notifications, and SQS/EventBridge for asynchronous workflows with SLA and expiry automation. Integrated AI-powered fraud detection, multi-factor OTP authentication, rate limiting, and company domain validation to ensure high security and anti-abuse protection. Implemented an e...

    $2031 Average bid
    $2031 平均报价
    16 个竞标

    Work Type: Remote (U.S. only) Employment Type: Contract Compensation: $30–$50 per hour (depending on experience) Start Date: Immediate — Project begins next week We are looking for a skilled AI / ML Engineer to join our team and help build a high-accuracy biometric authentication system for a smart lock platform. The goal of this project is to develop a facial recognition system with extremely low False Acceptance Rate (FAR < 0.01%), capable of identifying users accurately—even in challenging cases such as distinguishing identical twins. Project Environment - Training with large-scale biometric datasets such as MegaFace and mobile face recognition datasets - Deployment architecture will be hybrid, supporting both edge devices (smart lock hardware) and cloud s...

    $250 / hr Average bid
    $250 / hr 平均报价
    48 个竞标

    I need a complete game server built from the ground up, specifically for Minecraft. I am not looking for a quick config of an off-the-shelf host; the goal is a fully customised environment that I can scale and maintain long-term. Core scope I want the base server installed, optimised, and secured, then extended with gameplay features that set it apart. The essentials I have in mind are: • Mini-games – fast-paced sessions that players can jump into from a central menu • Custom plugins – original code, not just public downloads, to handle unique mechanics and economy hooks • Hub lobby – a polished spawn area that routes players smoothly to every game mode That means writing or adapting plugins (Java/Spigot, Paper, or another framework you recommend),...

    $258 / hr Average bid
    $258 / hr 平均报价
    19 个竞标
    Spring Boot Backend Bug Fixes
    6 天 left
    已验证

    My React front-end talks to a Spring Boot (Java) back-end that lives on a VPS. The feature set is ready, yet three areas keep breaking: database interactions, several API endpoints, and the authentication flow. I have already combed through the server logs for stack traces, but the root causes are still hiding. I need someone who can jump into the existing repository, reproduce the problems locally or directly on the VPS, and deliver clean, well-documented fixes. You may rely on any familiar tools—IntelliJ, Maven, Postman, Docker, TestContainers—as long as the final result is a stable build with all tests passing and no regressions on the React side. Deliverables • Updated Spring Boot codebase with functioning database, API and auth logic • Concise change log expl...

    $211 / hr Average bid
    $211 / hr 平均报价
    32 个竞标

    I need an Android mobile application for managing business inventory, production details, and inter-branch transfers within an organization. Core Feature: - Stock Level Tracking: Monitor and manage inventory levels in real-time. Ideal Skills and Experience: - Experience in mobile app development, specifically for Android. - Familiarity with inventory management systems. - Strong UI/UX design skills for mobile applications. - Ability to implement real-time data tracking and updates.

    $2810 Average bid
    $2810 平均报价
    37 个竞标

    I need a WhatsApp-based chatbot built and configured through the WATI platform. Its first job is simple but important: deliver automated replies that greet each person by name so every conversation feels human and immediate, even when I am offline. The flow logic, message templates, and WATI setup must all be ready for production, fully tested on a live WhatsApp Business number. I will provide the greeting copy and any brand assets you require; you handle the rest—from mapping triggers in WATI to deploying and confirming that the name-based personalisation pulls correctly from WhatsApp’s user data. While this initial scope is focused on automated replies, I chose WATI because it can later expand into customer support hand-offs or full order processing. Structure the bot s...

    $1958 Average bid
    $1958 平均报价
    10 个竞标

    I’m a non-technical professional who works closely with technology in my daily work. I now want to start building and testing my own tech ideas using “vibe coding.” I’m looking for an experienced developer who can mentor me and teach the core fundamentals required to build simple products end-to-end. This will be a short, intensive learning engagement (about one week) starting next week. The goal is to quickly understand the core tools and workflows so I can start prototyping ideas independently. Topics I want to learn include: - Working with VS Code - GitHub basics and Git workflows - Understanding development environments (local machine / virtual machines) - CI/CD fundamentals - Understanding project structure and common file types - API integrations - Backend b...

    $117 / hr Average bid
    $117 / hr 平均报价
    26 个竞标

    We’re using Apache Superset in a multi-tenant setup, where each chart in embedded dashboard is filtered using Row-Level Security (RLS) per tenant. We need an experienced Superset freelancer to help automate dashboard email scheduling, downloading, and theming — all integrated with our Java application. Scope of Work 1️⃣ Trigger Dashboard Email Scheduling • Enable our Java (Spring Boot) app to trigger Superset’s email scheduling for configured dashboards/charts. • Ensure predefined filters and tenant context are applied automatically via RLS or parameters. • Handle PDF/email generation via Superset’s API or Celery tasks. 2️⃣ Dashboard Download via REST API • Use Superset REST API / Guest Tokens to download dashboards/Charts as PDFs /csvs using...

    $1689 Average bid
    $1689 平均报价
    11 个竞标

    I want to launch a Zomato-style application focused on my city’s restaurants and diners. The platform will serve three audiences—customers who place orders, restaurant partners that receive and confirm them, and delivery personnel who fulfil them—so the workflow needs to feel seamless for all sides. Real-time delivery tracking is the number-one priority. Customers should see their courier move on a live map, receive status push notifications, and get accurate ETA updates. Building that reliably (GPS polling, socket connections or Firebase, background location permissions, etc.) is critical before we polish the rest of the experience. Beyond tracking, the usual ordering flow and restaurant catalogue will still be needed, but we can iterate on those once the tracking engi...

    $944 Average bid
    $944 平均报价
    33 个竞标

    I am ready to dive into natural language processing and would like structured, hands-on coaching that takes me from the basics to building reliable text-classification models. My preferred language is Python, so examples should rely on common stacks such as Jupyter Notebook, Pandas, scikit-learn or, when it makes sense, PyTorch and Hugging Face Transformers. Java and R are not in scope for this engagement. Here is what I need from you: • A clear learning roadmap that starts with data cleaning and exploratory analysis, then walks through feature engineering (tokenisation, embeddings, etc.), model selection, training, evaluation and deployment. • Well-commented Python notebooks and sample datasets so I can reproduce every step on my own machine. • Short explanations ...

    $78 Average bid
    $78 平均报价
    9 个竞标

    I want to launch a lightweight Android app that helps teenagers sharpen their calculation speed. The core of the project is a bank of 500 multiple-choice questions covering mixed operations—addition, subtraction, multiplication, and division , square, cube , percentage all shuffled together. There will be also a payment speed math tricks. Here is what I need delivered: • A clean, tap-friendly Android interface that feels engaging to teens. • All 500 questions stored locally so the app works offline. • Randomised order and answer shuffling each session to keep practice fresh. • A simple timer and score display so users can track both accuracy and speed. • A summary screen that shows total correct answers, average time per question, and a quick res...

    $4548 Average bid
    $4548 平均报价
    35 个竞标

    I want a lightweight Android application that lets me do two things from one device: • Watch the full, live screen of another Android phone, in real time. • Pull and display all incoming and outgoing SMS messages from that same phone. And watch image and video also No login, signup, or elaborate security flow is required; the app should open straight into a very simple interface with only the essential buttons needed to start and stop mirroring or read texts. Icons, colours, and layouts can stay basic—function over form. Technical freedom is yours, yet I expect smooth frame-rates for the mirroring (WebRTC, RTSP, or any efficient protocol you prefer) and reliable, near-instant SMS capture using Android’s default permissions model. You may work in Java or Kotlin...

    $78 Average bid
    $78 平均报价
    16 个竞标

    I want to launch a lightweight Android app that helps teenagers sharpen their calculation speed. The core of the project is a bank of 500 multiple-choice questions covering mixed operations—addition, subtraction, multiplication, and division , square, cube , percentage all shuffled together. There will be also a payment speed math tricks. Here is what I need delivered: • A clean, tap-friendly Android interface that feels engaging to teens. • All 500 questions stored locally so the app works offline. • Randomised order and answer shuffling each session to keep practice fresh. • A simple timer and score display so users can track both accuracy and speed. • A summary screen that shows total correct answers, average time per question, and a quick res...

    $1988 Average bid
    $1988 平均报价
    28 个竞标

    I need a developer who can design and implement an API connection from scratch, then integrate it smoothly into my existing system. I am flexible on the architecture—RESTful, GraphQL, or even SOAP—so please suggest the approach you feel best suits modern maintainability and performance. Because the system’s purpose is still being refined, the API should be built in a way that can serve multiple potential use-cases, such as: • syncing data with external partners, • feeding internal applications, • or acting as a gateway for future third-party services. Key expectations • End-to-end setup: specification, development, basic documentation, and a tested deployment. • Secure authentication and solid error handling. • Clear code comments...

    $243 / hr Average bid
    $243 / hr 平均报价
    100 个竞标

    I want to bring a simple, addictive “Flip Bird” style experience to the web. The game should be fully playable in any modern desktop or mobile browser with no extra plugins—pure HTML5, JavaScript (or TypeScript), and CSS/Canvas/WebGL are fine as long as everything stays lightweight. Here’s the vision: • 2D gameplay that feels instantly familiar: one-tap or click to keep the bird airborne while dodging oncoming obstacles. • A bright, cartoonish look—think bold colours, chunky outlines, and playful animations—but all original artwork so we stay clear of any Flappy Bird assets. • Responsive design so the window can scale from phone screens up to full-size monitors without stretching or letter-boxing. • Clean sound effects and a lo...

    $32 / hr Average bid
    $32 / hr 平均报价
    13 个竞标

    I need two specific, high-priority modules built and integrated into my existing Supabase architecture: 1. Automated Payment & Vendor Splits (Stripe Connect) Implement Stripe Connect (Express or Standard) to handle multi-sided transactions. Automate a 40/60 profit split (40% Platform / 60% Creator) at the point of sale. Configure automated onboarding flows for student "vendors" (KYC/KYB). 2. Dynamic DRM & Asset Security (The "Vault" Security) Implement Dynamic PDF Watermarking: Every file must be stamped with the Buyer’s Name, Email, and IP Address at the moment of download. Access Control: Ensure files are never directly accessible via a public URL; use Supabase Row Level Security (RLS) and Signed URLs to protect assets. Session Locking: Prevent a...

    $4125 Average bid
    $4125 平均报价
    72 个竞标

    Saya ingin sebuah aplikasi sosial media khusus Android. Fokus saya pada pembuatan aplikasi, bukan website atau desain grafis. Ruang lingkup utama: • Autentikasi pengguna sederhana (daftar, login, lupa password). • Beranda tempat pengguna dapat membuat, melihat, dan menyukai posting berbasis teks maupun gambar. • Profil pengguna yang menampilkan foto, bio singkat, serta daftar posting miliknya. • Pencarian atau penelusuran akun agar pengguna dapat saling mengikuti. • Notifikasi dasar (misalnya “seseorang menyukai posting Anda”). Teknologi pilihan saya fleksibel, tetapi saya ingin aplikasi native Android (Java / Kotlin) agar kinerja optimal. Backend boleh memakai Firebase atau solusi serupa bila itu mempercepat proses. Serahkan: 1. AP...

    $133 / hr Average bid
    $133 / hr 平均报价
    5 个竞标

    I have a finished PDF that I want packaged as a standalone Android application. When the user opens the APK, it must immediately show the book in full-screen landscape and stay that way—no status bar, no navigation chrome. Page turns should feel like a real book with a smooth flip animation, yet the overall interface must stay minimalist and clean: a plain background, subtle controls, no decorative clutter. Security is just as important. The app has to block screenshots and screen recordings on every device that supports Android’s FLAG_SECURE protection (or any equivalent method you find more robust). If the device cannot be secured, display a brief warning message and close. At the end I need: • Release-ready APK and a signed debug build for testing • Complete An...

    $4118 Average bid
    $4118 平均报价
    72 个竞标

    Saya mencari mitra pengembang aplikasi berpengalaman untuk membangun sebuah aplikasi sosial media khusus Android. Fokus utama saya adalah: • Otentikasi pengguna (daftar & masuk) • Pembuatan dan pengeditan profil • Feed beranda tempat pengguna dapat membuat posting, memberi suka, dan berkomentar • Pencarian dan follow antar-pengguna • Notifikasi push untuk aktivitas penting Saya sudah memiliki konsep UI sederhana dan alur fitur dasar; saya butuh Anda menuangkan semuanya ke dalam kode native atau framework Android yang Anda kuasai (Java, Kotlin, atau Flutter dipersilakan). Kinerja ringan, desain bersih, dan struktur kode mudah dipelihara sangat saya utamakan. Deliverable yang saya harapkan: 1. Source code lengkap 2. File desain/asset yang digunak...

    $46186 Average bid
    $46186 平均报价
    3 个竞标

    I need a small, clean Android application built with Flutter that I can compile in Android Studio and publish to Google Play. The core flow is straightforward: users create an account or sign in with their email and password, land on a personal task list, add simple text tasks, and receive timely reminders via local push notifications. Scope of work • Build the full Flutter project targeting Android 12+. • Implement Firebase (or another lightweight backend you prefer) for secure email-password authentication. • Provide a minimal, intuitive UI: task list screen, add-task dialog, and a settings area to adjust reminder times. Subtasks, social logins, or complex due-date logic are out of scope for now. • Set up basic local notifications so each task can trigger a r...

    $1033 Average bid
    $1033 平均报价
    81 个竞标

    I’m expanding a vetted network that places senior-level developers in long-term, high-paying roles with top-tier U.S. companies operating on CST, EST, and PST schedules. To join, you’ll need 4-6 years of solid professional experience building production systems in Java, C#, or Python, plus enough front-end know-how to collaborate comfortably with React, Angular, or Vue teams. Excellent spoken and written English (C1 or above) is essential because you’ll attend client-facing interviews and daily stand-ups. If you thrive in remote environments, can overlap at least four business hours with U.S. time zones, and enjoy tackling complex backend or full-stack challenges, let’s talk. What happens next once you apply: • A short screening call to confirm technical fi...

    $32988 Average bid
    $32988 平均报价
    52 个竞标
    Desktop AI Agent Development
    5 天 left
    已验证

    I'm looking for an AI agent to automate tasks on a desktop application. The primary focus will be on workflow management and email processing. Key Requirements: - Integrate seamlessly with existing desktop application. - Automate workflow management tasks. - Process and manage emails efficiently. Ideal Skills and Experience: - Proficiency in AI development. - Experience with desktop application integration. - Strong background in automation tools and techniques. - Familiarity with email processing automation. Please provide examples of previous similar work.

    $407 / hr Average bid
    $407 / hr 平均报价
    29 个竞标

    I want to launch a lightweight Android app that helps teenagers sharpen their calculation speed. The core of the project is a bank of 500 multiple-choice questions covering mixed operations—addition, subtraction, multiplication, and division , square, cube , percentage all shuffled together. There will be also a payment speed math tricks. Here is what I need delivered: • A clean, tap-friendly Android interface that feels engaging to teens. • All 500 questions stored locally so the app works offline. • Randomised order and answer shuffling each session to keep practice fresh. • A simple timer and score display so users can track both accuracy and speed. • A summary screen that shows total correct answers, average time per question, and a quick res...

    $2106 Average bid
    $2106 平均报价
    42 个竞标

    with modern architecture, better UI/UX, easier maintenance, and long-term scalability. The new system should cover core school operations such as: admissions student management attendance fee management exams and report cards timetable certificates and ID cards notifications parent/student/teacher communication pdf and excel reports and dashboards role based access payment gateway integration help/support features Technology: Java EE / MySQL Backend, Modern Web UI, Flutter App

    $4908 Average bid
    $4908 平均报价
    73 个竞标

    **Job Description (Paragraph):** We are seeking an experienced Software Developer or Technical Evaluator who can effectively assess the performance and coding practices of both Frontend and Backend Developers through recorded screen sessions, without requiring access to the source code. The ideal candidate will have strong expertise in modern software development workflows, the ability to analyze development approaches, debugging methods, architecture decisions, and overall problem-solving skills by observing developers’ real-time or recorded working processes. This role involves reviewing screen recordings of developers performing tasks, evaluating their technical proficiency, development efficiency, adherence to best practices, and ability to design, implement, and troubleshoot so...

    $31 / hr Average bid
    $31 / hr 平均报价
    24 个竞标

    I’m ready to launch a dedicated Android e-commerce application that will showcase and sell physical products only. The goal is a smooth, secure shopping experience from browsing to checkout, built natively (Kotlin/Java) or with a reliable framework such as Flutter—whichever you’re most comfortable with for optimal Android performance. Core flow I have in mind: a clean product catalogue, searchable categories, detailed item pages, a persistent cart, integrated payment gateway, and basic order-tracking for customers. I will provide product data and branding assets; I need you to turn them into a polished APK, connected to a lightweight admin dashboard or API of your choice so I can manage inventory and fulfil orders without touching code. Please keep the initial release A...

    $2616 Average bid
    $2616 平均报价
    56 个竞标

    I have an existing Task Management System built with Java, MySQL, HTML, CSS and JavaScript. It already handles user registration, task creation, updates and progress tracking, but I now need a round of polishing and growth. Improvements I want right away involve • giving the interface a cleaner, more responsive look and feel, • tightening performance so pages load quickly even with a large task list, and • hardening security around authentication, role-based access and data storage. On top of that, I’d like to expand the product with new functionality—think calendar-style views, smart notifications or whatever you propose—and connect it with popular collaboration tools (for example Slack, Microsoft Teams or Google services). If you have ideas for se...

    $78 / hr Average bid
    $78 / hr 平均报价
    47 个竞标
    Likandflow Android App Build
    5 天 left
    已验证

    I’m bringing Likandflow to life as a dedicated Android application and need a developer who can take it from concept to a polished launch-ready build. The first milestone is rock-solid user authentication—secure sign-up, log-in, and password recovery—with clean error handling and a future-proof structure that makes it easy to extend into features such as push notifications or in-app purchases later on. You’ll handle the entire Android stack: UI that follows Material Design, Kotlin or Java (your preference, as long as code is well-structured and documented), interaction with a back-end auth service (Firebase Auth works, but I’m open to your suggestion), and creating a signed release APK plus source in a Git repository. Once I can install the APK, create an ...

    $4243 Average bid
    $4243 平均报价
    68 个竞标

    I have a finished PDF that I want packaged as a standalone Android application. When the user opens the APK, it must immediately show the book in full-screen landscape and stay that way—no status bar, no navigation chrome. Page turns should feel like a real book with a smooth flip animation, yet the overall interface must stay minimalist and clean: a plain background, subtle controls, no decorative clutter. Security is just as important. The app has to block screenshots and screen recordings on every device that supports Android’s FLAG_SECURE protection (or any equivalent method you find more robust). If the device cannot be secured, display a brief warning message and close. At the end I need: • Release-ready APK and a signed debug build for testing • Complete An...

    $470 Average bid
    $470 平均报价
    49 个竞标

    I’m expanding our LLM-focused R&D pod in Noida and need a hands-on Python engineer who can start contributing on day one. You must be comfortable building asynchronous back-ends in FastAPI, have real production experience creating LangChain chains and agents, and be equally at ease working with both OpenAI and Hugging Face models. Day-to-day you’ll design and optimise micro-services that call LLMs, manage embeddings in Pinecone or FAISS, and orchestrate data flows through PostgreSQL, MongoDB and Redis—everything neatly containerised in Docker for local and cloud runs. Expect plenty of room to prototype new AI features, run quick experiments, and then harden the successful ones for scale. The role is 100 % onsite in our Sector-62 Noida office; close collaboration wit...

    $5621 Average bid
    $5621 平均报价
    37 个竞标

    I need a simple, cost-free Android application that lets me point my phone at any supermarket barcode and instantly see three pieces of data pulled from an Excel sheet: the quantity I still have on hand, the current selling price, and any ordering details I have stored. The app must work entirely offline while I’m on the shop floor; I’ll only reconnect when I swap in a refreshed dataset. Here is the flow I’m after. I export my stock report every morning to Excel, drop the file into a predefined folder (or upload it through a small admin screen), and the app overwrites yesterday’s data. When a barcode is scanned, the item record is located locally and the three fields display in a clean, readable layout. I’m open to any no-code or low-code platform—AppSh...

    $1558 Average bid
    $1558 平均报价
    80 个竞标

    The project is related to Service-Oriented Architecture (SOA) and web-service environments, with a focus on protecting service performance and availability using a QoS-aware intrusion detection framework. The work involves detecting malicious traffic that affects service quality, such as denial-of-service, brute-force, and other intrusion behaviors, using machine learning and flow-based network analysis. And for the freelancer, write this: What I need in the technical person: I need a technical freelancer who has strong knowledge in: • Service-Oriented Architecture (SOA) or web-service systems • Network security and intrusion detection • Machine learning / anomaly detection • Python and scientific implementation • Data preprocessing, feature engineering, a...

    $4172 Average bid
    $4172 平均报价
    59 个竞标

    I need an Android app designed for social networking. The app should focus on connecting users and facilitating interactions. Essential Features: - User Profiles: Customizable profiles with photos and bios. - Friend/Connection System: Add or follow users. - News Feed: Updates from connections. - Messaging: Direct messages between users. - Search Functionality: Find users by interests or location. Ideal Skills and Experience: - Android Development (Java/Kotlin) - UI/UX Design for Mobile Apps - Experience with Social Networking Features - Knowledge of Database Management - Strong Communication Skills Please provide a portfolio showcasing relevant projects.

    $2427 Average bid
    $2427 平均报价
    38 个竞标

    I need a complete Android application that lets me run and manage online classes from one place. The core experience should allow students to join live video sessions and exchange messages in real-time while the class is running. Alongside this, I want a built-in task-management area where I can post assignments, track submissions and mark work. Here is the scope of what I’m after: • Android only – the entire project, from UI to final APK, must be optimised for the latest stable Android release. • Live video classroom – smooth, low-latency streaming with basic teacher controls (mute, remove, screen-share). • In-session chat – text chat that sits beside the video so learners can ask questions instantly. • Task management – create tas...

    $49 / hr Average bid
    $49 / hr 平均报价
    27 个竞标

    Android Developer Needed to Complete Educational Mobile App (Capacitor / Android Studio / Play Store) Project Overview We are seeking an experienced Android developer to assist with the final completion and deployment of an educational mobile application called BeeSmart Spelling Bee. The application is already live on web and iOS, and the Android version is mostly complete but requires troubleshooting, configuration fixes, and final preparation for Google Play Store release. This is not a full build from scratch. The majority of the work involves debugging, configuration alignment, and completing Android-specific functionality. The app is built using a web-based framework with Capacitor for mobile deployment. Key Responsibilities The freelancer will help complete and finalize the An...

    $493 Average bid
    $493 平均报价
    52 个竞标

    Project Title: Android App Development – Minimal Position Size Calculator (Kotlin + Jetpack Compose) Project Overview I am building a minimal Android trading utility that calculates position size based on risk management. The goal is to create a fast, clean, and reliable calculator used by traders before entering a trade. This is Version 1 of the app, so the scope is intentionally small. The focus is on excellent UX, performance, and code quality, not on feature quantity. Future versions will expand into a full trading journal, so the codebase should be clean and extensible. Key Requirements The app must be: Native Android Smooth and responsive Minimal and aesthetically clean Fully offline Privacy-first (no login, no tracking) Technology Requirements Please use: Kotlin...

    $492 Average bid
    $492 平均报价
    18 个竞标

    More details: Is this project for business or personal use? Personal What information should successful freelancers include in their application? This question was skipped by the user How soon do you need your project completed? This question was skipped by the user **App name**: Updated to "Kidsy TV Channel" **Live Streaming (Castr support)**: I tested your exact links and they work perfectly: - Direct HLS links: - Works directly - Castr player links: - Auto-resolved to direct HLS stream The backend automatically extracts the real stream URL from Castr player links, so you can paste EITHER format in the admin panel. **On-Demand Videos (Castr VOD + MP4)**: - Castr VOD links: - Auto-resolved to direct HLS - Direct MP4 links - Work directly - Upload from your computer - Also...

    $603 Average bid
    $603 平均报价
    20 个竞标

    Attendance Management App with Integrated CRM System (Android + Web Admin) Project Description We are looking for an experienced developer or development team to build a complete Attendance Management Application with an integrated CRM system. The application will be used for managing employee attendance, tracking field staff activity, and managing customer relationships and sales data. The system should include a mobile application for employees and a web-based admin panel for management. Core Modules Required 1. Employee Attendance System Features required: Employee Login / Logout Daily Check-in & Check-out GPS Location Tracking during attendance Selfie Photo Capture at check-in Time Tracking Late Entry Detection Leave Request System Attendance History Monthly Attendanc...

    $1243 Average bid
    $1243 平均报价
    67 个竞标

    I want Lottie files expert to create gifts for my app

    $196 Average bid
    $196 平均报价
    24 个竞标

    I have an existing Task Management System built with Java, MySQL, HTML, CSS and JavaScript. It already handles user registration, task creation, updates and progress tracking, but I now need a round of polishing and growth. Improvements I want right away involve • giving the interface a cleaner, more responsive look and feel, • tightening performance so pages load quickly even with a large task list, and • hardening security around authentication, role-based access and data storage. On top of that, I’d like to expand the product with new functionality—think calendar-style views, smart notifications or whatever you propose—and connect it with popular collaboration tools (for example Slack, Microsoft Teams or Google services). If you have ideas for se...

    $80 / hr Average bid
    $80 / hr 平均报价
    52 个竞标

    I have an existing Task Management System built with Java, MySQL, HTML, CSS and JavaScript. It already handles user registration, task creation, updates and progress tracking, but I now need a round of polishing and growth. Improvements I want right away involve • giving the interface a cleaner, more responsive look and feel, • tightening performance so pages load quickly even with a large task list, and • hardening security around authentication, role-based access and data storage. On top of that, I’d like to expand the product with new functionality—think calendar-style views, smart notifications or whatever you propose—and connect it with popular collaboration tools (for example Slack, Microsoft Teams or Google services). If you have ideas for se...

    $84 / hr Average bid
    $84 / hr 平均报价
    53 个竞标

    I generate a steady flow of personal-loan leads every day and I’m ready to start monetising them. What I still need is the technical and marketplace framework that allows buyers to receive those leads in real time, either through a classic ping/post flow or a straightforward REST API. Here’s what I know so far: • I’m happy to sell through public marketplaces as well as direct integrations, so please feel free to suggest LeadConduit, Lead Prosper, boberdoo, CAKE, or any platform you feel is fit for purpose. • My leads are strictly for the personal-loan space, so whatever routing logic you build needs to respect that vertical’s typical data fields and compliance requirements (TCPA, CAN-SPAM, etc.). • I don’t have any existing infrastructure...

    $1440 Average bid
    $1440 平均报价
    80 个竞标

    Telegram Job Marketplace Bot 1. Project Overview A high-automation, AI-driven recruitment platform built as a Telegram bot. The system connects employers and job seekers, utilizing AI for resume parsing, candidate matching (Match Score), and automated job distribution. 2. Core Functionality Job Seekers: Conversation-based profile creation, PDF resume upload with AI extraction, job filtering by category/location, and real-time application status tracking (Seen, Shortlisted, Rejected). Employers: Conversational job posting, dashboard for managing vacancies (Pause, Resume, Close), and AI-powered applicant ranking (Top 15% recommendations). Admin Panel: Full moderation of users and vacancies, sub-admin management, and detailed CSV-exportable analytics. 3. Key System Features AI Integrati...

    $822 Average bid
    $822 平均报价
    38 个竞标

    Senior Full Stack Developer (Fintech / Web3 Product) We are looking for a senior freelance developer to join an active digital product currently under development, focused on digital payments infrastructure, wallet experience, and blockchain-based transactional operations. The project already has a functional technical base and requires someone able to quickly understand an existing architecture, identify critical points, and contribute with solid technical solutions from both engineering and product perspectives. We are not looking for isolated task execution, but for strong technical judgment, scalability mindset, and the ability to solve real product challenges where frontend, transactional logic, and user experience are closely connected. Required Profile Proven senior experience ...

    $4212 Average bid
    $4212 平均报价
    127 个竞标

    I need an end-to-end build of a taxi-booking ecosystem that covers three mobile experiences (rider, driver, operator) and a cloud-hosted SaaS core. For riders on Android and iPhone, the interface must make it effortless to schedule a trip, watch the vehicle approach in real time, pay by card, wallet or other gateways, and immediately rate the ride and leave feedback. Google / Apple Maps, a mainstream payment gateway and an SMS provider must be wired in cleanly. The operator dashboard will live on the web. It needs to display live fleet locations, let staff drill into analytics and reporting, and surface driver performance metrics at a glance. Charts, exportable reports and real-time filters should all feel native and quick. Drivers get their own app focused on navigation and route...

    $5652 Average bid
    $5652 平均报价
    161 个竞标

    Project Overview We are building ConnectPro, a sophisticated multitenant SaaS platform for community and professional networking. The platform features three distinct portal experiences powered by subdomains: SuperAdmin Portal () - Platform management. Company/Admin Portal () - Community management and branding. User/Member Portal (user.[company-subdomain].) - Professional social feed, members directory, and events. Tech Stack Frontend: React (Vite), TypeScript, Tailwind CSS, Framer Motion, Lucide Icons. Backend: Node.js, Express, TypeScript. Database: PostgreSQL with Prisma ORM. Auth: JWT-based, handling multiple subdomain contexts. Multitenancy: Hostname-based tenant detection and data isolation. What We Need Done We are looking for a developer to take over feature development and resol...

    $939 Average bid
    $939 平均报价
    23 个竞标
    Telegram Job Marketplace Bot
    3 天 left
    已验证

    1. Project Objective Develop a Telegram Job Marketplace Bot that allows: Jobseekers to find and apply for jobs Employers to post and manage vacancies AI to parse CVs and recommend candidates Admin to moderate and monitor the system The system must be automated, scalable, secure, and run on a low-resource VPS (1GB RAM). 2. Core Feature Completion (100% Required) The project is successful when the following modules are fully functional: Jobseeker registration & profile Employer registration & verification Vacancy posting & channel publishing Inline buttons: Apply / Save / Share / Report Resume upload & AI CV parsing Job applications & status tracking Employer dashboard & applicant management In-app employer–applicant messaging AI candidate recom...

    $1221 Average bid
    $1221 平均报价
    51 个竞标

    I noticed you are looking for a developer to build a centralized monitoring architecture using the EZVIZ Cloud API/SDK. With my experience in video streaming integration and backend development, I am confident I can help you complete this initial phase with a scalable, high-performance solution. Why Choose Me? EZVIZ Expertise: I have a deep understanding of the EZVIZ Developer Platform ecosystem, including device management and stream retrieval via APIs. Video Streaming: Experienced in managing HLS and WebRTC protocols to ensure low-latency performance on the operator dashboard. Backend & Scalability: Proficient in using [Mention Your Language: Node.js/Python/Java] to build a backend capable of handling 200+ cameras in the future. Custom Dashboard: I can develop an intuitive, custom mo...

    $3437 Average bid
    $3437 平均报价
    64 个竞标

    Needs to hire 9 Freelancers Summary We're building Dream Server — an open source, self-hosted AI platform positioning itself as the Linux of Local AI. Free platform, sovereign deployment, zero dependency on Big AI. The project is cross-platform (Linux, Windows, Mac), runs on consumer and prosumer hardware, and is designed to deliver real AI infrastructure to nonprofits and mission-driven organizations. This is early-stage, high-impact open source work. We're looking for a contributor who can grow with the project. **The Stack** - Linux / Docker / systemd service orchestration - Python / AI inference (vLLM, , Whisper, Piper TTS) - Open WebUI, n8n, Qdrant, ComfyUI - Frontend dashboard (custom retro/CRT aesthetic) - Cross-platform deployment and hardware compatibility **Wha...

    $454 / hr Average bid
    加精
    $454 / hr 平均报价
    90 个竞标

    Saya ingin merilis sebuah aplikasi keuangan di platform Android yang berfokus pada penyusunan laporan keuangan secara otomatis. Intinya, pengguna cukup memasukkan transaksi harian, lalu aplikasi mengolah dan menyajikan laporan laba-rugi, arus kas, serta neraca dalam tampilan ringkas—dengan opsi ekspor ke PDF atau Excel. Cakupan kerja: • Bangun antarmuka Android yang intuitif (Java / Kotlin). • Buat modul pencatatan transaksi sederhana dengan kategori dasar. • Kembangkan engine perhitungan laporan keuangan real-time. • Sediakan fitur ekspor dan bagikan laporan. • Sertakan dokumentasi singkat dan kode sumber terstruktur. Aplikasi harus ringan, kompatibel minimal Android 8, serta mudah dikembangkan lebih lanjut bila kelak saya ingin menambah Pelacak ...

    $133 / hr Average bid
    $133 / hr 平均报价
    9 个竞标

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