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!

De 244,990 opiniones, los clientes califican nuestro Java Developers 4.9 de un total de 5 estrellas.
Contratar a 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!

De 244,990 opiniones, los clientes califican nuestro Java Developers 4.9 de un total de 5 estrellas.
Contratar a Java Developers

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    111 trabajos encontrados

    Necesito apoyo para llevar mi aplicación de aprendizaje de idiomas desde su estado actual hasta su publicación oficial en Google Play. La app está pensada únicamente para Android por el momento, y requiero a alguien que domine tanto Play Console como Google Cloud Console para dejar todo listo y funcionando. Lo que espero del trabajo: • Configurar Play Console: crear ficha de la aplicación, carga de AAB, firmas, políticas, testers y versiones de producción. • Ajustes en Google Cloud Console: habilitar servicios necesarios, crear claves API y vincular backend si fuera preciso. • Verificación de cumplimiento con directrices de contenido, privacidad y facturación (si aplica). • Orientarme con los pasos fi...

    €11 / hr Average bid
    €11 / hr Oferta promedio
    71 ofertas

    Desarrollador con experiencia en Facturación Electrónica DGII (República Dominicana) – Desarrollo de API de Integración **Descripción del proyecto** Buscamos un **desarrollador con experiencia comprobada en facturación electrónica en República Dominicana** para desarrollar una **API de integración con la DGII (e-CF)** que permita conectar nuestro sistema ERP/POS con el ambiente de pruebas y posteriormente producción. El candidato **debe haber implementado previamente integraciones con la DGII** y conocer el proceso completo de autenticación, firma digital y envío de comprobantes electrónicos. **Alcance del trabajo** La API debe incluir: 1. **Autenticación con DGII** * Obtener se...

    €878 Average bid
    €878 Oferta promedio
    72 ofertas

    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...

    €273 Average bid
    €273 Oferta promedio
    37 ofertas

    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...

    €9 / hr Average bid
    €9 / hr Oferta promedio
    35 ofertas
    Likandflow Android App Build
    6 días left
    Verificado

    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 ...

    €480 Average bid
    €480 Oferta promedio
    59 ofertas

    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...

    €47 Average bid
    €47 Oferta promedio
    32 ofertas
    DayZ Water Tank Script
    6 días left
    Verificado

    I need a script for DayZ that enhances the operational features of a water tank. The script should allow players to: - Drink from the water tank - Fill bottles at the water tank - Wash hands using the water tank Additionally, I need a vehicle inventory group system to manage vehicle inventories more efficiently. I am looking for someone who can deliver this script ASAP. Ideal skills and experience include: - Proficiency in DayZ scripting - Experience with water mechanics in survival games - Strong understanding of vehicle inventory systems in DayZ Please provide examples of similar work done.

    €91 Average bid
    €91 Oferta promedio
    29 ofertas

    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...

    €658 Average bid
    €658 Oferta promedio
    22 ofertas

    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...

    €151 Average bid
    €151 Oferta promedio
    63 ofertas

    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...

    €454 Average bid
    €454 Oferta promedio
    54 ofertas

    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.

    €268 Average bid
    €268 Oferta promedio
    36 ofertas

    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...

    €5 / hr Average bid
    €5 / hr Oferta promedio
    26 ofertas

    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...

    €45 Average bid
    €45 Oferta promedio
    49 ofertas

    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...

    €63 Average bid
    €63 Oferta promedio
    15 ofertas

    My MySQL instance on a Windows server suddenly stopped running and refuses to start again. I have not touched the server or its MySQL configuration recently, so the root cause is still unknown. When I attempt to launch the service I don’t see a clear error message, so I need a specialist who can quickly connect, investigate the logs, trace the failure, and restore normal operation. Scope of work • Diagnose the exact reason the MySQL service fails to start on Windows. • Apply a clean, permanent fix that brings the service back online without data loss. • Provide a brief report outlining the root cause and the steps you took, so I can replicate or reverse them later if needed. Please be comfortable working on Windows-based MySQL servers, using typical tools suc...

    €135 Average bid
    €135 Oferta promedio
    69 ofertas

    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...

    €67 Average bid
    €67 Oferta promedio
    20 ofertas

    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...

    €138 Average bid
    €138 Oferta promedio
    66 ofertas

    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...

    €9 / hr Average bid
    €9 / hr Oferta promedio
    50 ofertas

    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...

    €9 / hr Average bid
    €9 / hr Oferta promedio
    54 ofertas

    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...

    €160 Average bid
    €160 Oferta promedio
    80 ofertas
    AI-Driven Telegram Recruitment Bot
    5 días left
    Verificado

    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...

    €92 Average bid
    €92 Oferta promedio
    37 ofertas

    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 ...

    €469 Average bid
    €469 Oferta promedio
    127 ofertas
    Full-Stack Taxi App Development
    5 días left
    Verificado

    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...

    €627 Average bid
    €627 Oferta promedio
    161 ofertas

    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...

    €105 Average bid
    €105 Oferta promedio
    23 ofertas
    Telegram Job Marketplace Bot
    5 días left
    Verificado

    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...

    €136 Average bid
    €136 Oferta promedio
    51 ofertas

    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...

    €383 Average bid
    €383 Oferta promedio
    63 ofertas

    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...

    €51 / hr Average bid
    Destacado
    €51 / hr Oferta promedio
    87 ofertas

    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 ...

    €15 / hr Average bid
    €15 / hr Oferta promedio
    9 ofertas

    Job Summary : We are looking for a Junior Kotlin Mobile App Developer to support the development and maintenance of our Android applications. As our user base grows, we need a motivated developer to assist in implementing new features, fixing bugs, enhancing UI/UX performance, and supporting quality assurance efforts. This is a hands-on role where you'll work closely with our Lead Developer and Product Team, gaining real-world experience and contributing to live, user-facing projects. This role is ideal for someone with foundational knowledge of Kotlin and Android development who is eager to learn, grow, and thrive in a collaborative, agile environment. Role Summary : Minimum 2 years of Experience is desirable. • Assist in developing and maintaining Android applications using...

    €151 Average bid
    €151 Oferta promedio
    48 ofertas

    I'm in need of a seasoned Full Stack Software Engineer with AWS to assist with espically in Backend. (AWS knowledge is must , LAMBDA , STEP FUNCTIONS, ECS , Redshift) and Terraform .) Responsibilities : - Particiate in daily Monday to Friday 2 hour to discuss and solve backend java , AWS , Micro-service and Terraform task- Provide guidance on best practices and approaches - Take responsibvility of task management and delivery Qualifications: * Atleast 4- 5 years of experience in Java , Springboot , AWS , Microservices * Strong Experience with end-end testings for both frontend and backend. Compentation : $400-$450 / month for 2 hours of work per day If you are passiobate about coding and enjoying mentoring , I'd love to hear from you >

    €440 Average bid
    €440 Oferta promedio
    107 ofertas

    PROJECT DESCRIPTION We are looking for an experienced Android developer to build a professional mobile application for location-verified photo and video capture. The application will allow users to capture photos and videos with location-based information embedded directly into the image or video. The goal is to create a reliable field documentation tool that can be used in professional environments such as inspections, infrastructure monitoring, site documentation, and survey reporting. The application will include camera functionality, GPS location capture, metadata overlays, media storage, gallery viewing, and report generation features. This project requires strong experience in: • Native Android development • CameraX API • GPS and location services • And...

    €293 Average bid
    €293 Oferta promedio
    63 ofertas
    Google Drive–Gemini AI Connector
    4 días left
    Verificado

    We are looking for a skilled developer to build a Google Drive to Google Gemini AI Connector. The goal is to create a secure, reusable application that allows querying and processing documents stored in Google Drive using Gemini’s AI capabilities. Key Features: - OAuth2-secured Google Drive integration (read-only access) - Full Google Gemini API support - RAG (Retrieval-Augmented Generation) for intelligent document processing - Web interface for user-friendly querying - REST API for programmatic acces - Support for multiple file formats: PDF, Docs, Word, Text, CSV - Reusable template to create multiple independent knowledge bases Deliverables: - Fully functional connector application - Complete, well-documented source code - Configuration files and setup instructions - Web interfa...

    €177 Average bid
    €177 Oferta promedio
    141 ofertas

    A proposal is a formal document or written plan used to present an idea, project, or solution to someone for approval or support. It explains what a person or organization wants to do and why it should be accepted. Proposals are commonly used in business, education, research, and project planning. The main purpose of a proposal is to convince the reader that the idea is useful, practical, and worth implementing. A good proposal clearly describes the problem or need, the objectives of the project, and the methods that will be used to achieve the goals. It also may include information about required resources, time schedule, and expected outcomes. Proposals are usually written in a clear and organized manner so that the reader can easily understand the plan. In many cases, they contain sec...

    €246 Average bid
    €246 Oferta promedio
    18 ofertas

    I need an experienced software engineer who can step into scheduled Zoom / Google Meet calls and treat them exactly like real technical interviews. During each 45- to 90-minute session you will share your screen, think out loud, and solve data-structure, algorithm, and the occasional system-design problem in real time. To make sure the sessions feel authentic you should already be comfortable white-boarding (or using an online pad) in at least one major language—Java, Python, JavaScript, C++, or a similar modern stack is fine—and be able to defend your approach under follow-up questions. Clear, confident English is important so the interviewers can probe your reasoning without friction. When you reply, tell me: • the language(s) you want to use, • a brief note...

    €118 Average bid
    €118 Oferta promedio
    33 ofertas

    I need a full-function Android application that lets users request and receive a short-term payday loan that must be repaid in seven days. The flow should feel effortless: from a simple, clean onboarding screen through to instant approval, wallet funding, and automated repayment reminders. Here is what matters most to me right now: • Platform: Android only. • Look & feel: simple, uncluttered UI that moves users from registration to cash-out in as few taps as possible. You will be responsible for both the mobile front-end and the secure back-end (API + database). Expect to integrate standard KYC checks, a lightweight scoring logic for eligibility, mobile money / bank payout, and an admin console where I can review applications and monitor repayments. Deliverables –...

    €367 Average bid
    €367 Oferta promedio
    40 ofertas

    ق,صد دارم یک اپلیکیشن اندرویدی بسازم که هستهٔ اصلی آن ارسال و دریافت اعلان‌ (Push Notification) باشد. به یک برنامه‌نویس مسلط به Android Studio و Kotlin یا Java نیاز دارم تا نسخه‌ اولیه‌ای آماده کند که شامل موارد زیر باشد: • راه‌اندازی ساختار پروژه و معماری تمیز • پیاده‌سازی سرویس اعلان‌ها (Firebase Cloud Messaging یا راهکار معادل) • یک رابط کاربری ساده برای نمایش پیام‌های دریافتی • تنظیمات کاربر برای فعال/غیرفعال کردن اعلان‌ها • تحویل فایل APK قابل نصب، کد منبع مستند و راهنمای اجرای محلی اگر تجربه‌ی ادغام سرویس‌های آنالیتیکس یا ویژگی‌های تکمیلی دارید، خوشحال می‌شوم پیشنهاد بدهید اما تمرکز اصلی همان اعلان‌ها است. کد باید خوانا و قابل توسعه باشد تا در مراحل بعد بتوانم ویژگی‌های دیگری...

    €398 Average bid
    €398 Oferta promedio
    66 ofertas

    I need a secure Android banking app built from the ground up for Arab Bank. The core scope is clear: users must be able to manage their accounts, transfer funds, and pay bills effortlessly from their phones. To make this happen, I’ll supply API documentation for our core-banking system along with brand guidelines and sample data. Your task is to design and code the full mobile experience—clean UI, solid architecture, and encrypted communication throughout. Performance, accessibility, and regulatory compliance (PCI-DSS level practices) are non-negotiable. Deliverables • Fully functional Android app (latest stable SDK) • Source code in Git, well-commented and neatly structured • UI/UX assets (Figma or similar) • Integration layer that consumes our ...

    €20 / hr Average bid
    €20 / hr Oferta promedio
    123 ofertas

    We are building an offshore SAP development team for an ongoing international SAP project and are looking for experienced SAP UI5 Developers and SAP ABAP Developers to join a dedicated development team. The team will support SAP development, integration, and enhancement work within an SAP S/4HANA environment while collaborating with European stakeholders. Open Positions • 7 SAP UI5 Developers • 7 SAP ABAP Developers Experience Required 5–8 years of hands-on SAP development experience. Key Responsibilities • Develop and enhance SAP applications within the assigned technology stack • Participate in design discussions and development planning • Write clean, efficient, and maintainable SAP code • Support integrations with existing SAP modules and serv...

    €13 / hr Average bid
    €13 / hr Oferta promedio
    24 ofertas

    Project Description Highlights The Mission: We are building "QuantumShield," a high-performance, user-friendly desktop application that protects sensitive SMB data against "Harvest Now, Decrypt Later" threats using standardized Post-Quantum Cryptography. Key Technical Focus: This is not a standard encryption project. We require implementation of ML-KEM (Kyber) and ML-DSA (Dilithium) within a Hybrid Cryptographic Scheme (PQC + Classical AES-256). The Deliverable: A functional MVP for Windows/macOS featuring a "One-Click Shield" drag-and-drop interface and a "Quantum Health Dashboard" that monitors file vulnerability status. Required Tech Stack: High-performance systems programming (e.g., Rust, C++, or Go) with direct experience usi...

    €5486 Average bid
    €5486 Oferta promedio
    72 ofertas

    I want a lightweight program that links the 20 Schneider EM6436 energy meters installed on-site to my PC and streams their readings in real time. The meters already sit on the local network; what I need is the software layer—code plus installer—so I can open the application and immediately see up-to-date values without having to poll each unit manually. Language is flexible. If you prefer Python, C++, Java or another mainstream option, propose what offers the most stable performance for continuous acquisition. I’ll run the finished program on Windows, so please include any libraries or runtime packages I must install. Display format can be simple; the priority is receiving clean real-time data that I can later export or feed into other tools. If you have a quick way to ...

    €55 Average bid
    €55 Oferta promedio
    19 ofertas

    I need an AI-powered chatbot fully integrated with WhatsApp to drive sales and lead generation for my business. The bot must be able to greet new contacts with a personalized welcome, recommend relevant products based on their replies, and send smart follow-up messages that nurture the conversation until the prospect converts or asks to speak with a human. Key requirements • Seamless connection to the WhatsApp Business API (Twilio, 360dialog or a comparable gateway are all fine). • Natural-language understanding so the bot can pick up intent, handle objections, and upsell intelligently—Dialogflow, Rasa, GPT-based models or similar NLP engines are acceptable. • Simple dashboard or webhook endpoints where I can update product info and track captured leads. &bull...

    €92 Average bid
    €92 Oferta promedio
    52 ofertas

    Full-Stack Developer (Java / Spring Boot + Vue 3) – E-Commerce Platform – Ongoing Contract We are very interested in developers based in Ukraine, Romania, Czechia, Slovakia, Estonia, Latvia, Lithuania, Bulgaria, Slovenia, Croatia, Hungary, Poland, Vietnam, and Taiwan. If you are located in any of these regions, your bid will have priority review over bidders in much larger nations that tend to flood freelance markets with bids. About Us We operate an e-commerce platform serving international customers. Our system is built on a decoupled front-end/back-end architecture and is currently live in production. We're looking for a reliable full-stack developer to join us on an ongoing freelance basis to help with feature development, maintenance, bug fixes, and incremental imp...

    €139 Average bid
    €139 Oferta promedio
    53 ofertas

    I need a complete, production-ready 24 Hours Driver Tracking System that lets me see where every vehicle and driver is at any moment, day or night. Administrators, Drivers, and Dispatch Operators will each log in with their own role-based permissions. For tracking, GPS data must stream continuously to a secure database so I can pull up detailed trip history whenever required—start and stop times, routes taken, idle periods, and speed profiles. Beyond the live map view, the system should let me replay routes and export reports for safety audits and route optimisation. The administrator interface has to be a desktop application. I am open on framework choice—Electron, .NET, Java FX, or another stable stack—as long as it feels responsive and is easy to maintain. Front-...

    €13 / hr Average bid
    €13 / hr Oferta promedio
    38 ofertas

    We are looking for an experienced developer who can build an automated system to extract daily newly incorporated company data from the MCA (Ministry of Corporate Affairs) website – https://www.mca.gov.in. The system should automatically collect and deliver the list of companies incorporated each day in structured format (Excel / CSV / API / Database). Scope of Work: Develop a web scraping or API-based solution to extract daily incorporated company data from the MCA portal. The tool should automatically fetch newly incorporated companies every day. Data should include the following fields (minimum): CIN Company Name Date of Incorporation ROC (Registrar of Companies) State Company Type (Private Limited / LLP / OPC / Public Limited) Authorized Capital (if available) Regist...

    €87 Average bid
    €87 Oferta promedio
    30 ofertas

    I’m assembling a rotating panel of seasoned Java professionals to help me run technical interviews for upcoming hiring rounds. You should have a senior-level command of Core Java, the Spring Framework, and full-scale Java EE so you can probe candidates at depth and spot both strengths and red flags quickly. Every session will be a blend of structured technical questions, live coding challenges, and an open system-design discussion. I already have a question bank and an online coding environment in place, but I count on you to adapt on the fly, dig deeper when useful, and suggest new problems if a gap appears. Deliverables for each candidate you assess: • 60-minute video interview conducted on my platform • Real-time scoring against the rubric I provide • A concis...

    €18 / hr Average bid
    €18 / hr Oferta promedio
    83 ofertas

    I’m expanding a distributed team that delivers modern web applications for U.S.–based clients, and I need another full-stack developer who can jump in quickly and work 30+ hours each week for at least the next three months. Because many projects touch regulated data, U.S. citizenship is mandatory and you’ll be asked to confirm this during onboarding. The stack you’ll meet on day one is React on the frontend and Node.js/Express.js on the backend, so solid, hands-on experience with both is essential. If you also know TypeScript, Python, or Java—and have tinkered with Angular, Vue, Django, or Spring Boot—that versatility will come in handy, but React and Node.js are the core. I’m looking for someone who: • Has a minimum of two years of profess...

    €49 / hr Average bid
    €49 / hr Oferta promedio
    118 ofertas

    Saya ingin membangun sebuah aplikasi media sosial berbasis Android yang dapat segera mulai menghasilkan pendapatan. Fokus awal saya adalah memiliki prototipe fungsional yang memungkinkan pengguna: • Mendaftar dan masuk (email atau Google Sign-In). • Membuat profil dasar dengan foto. • Memposting teks, gambar, dan memberi “like” atau komentar. • Melihat feed beranda yang diperbarui real-time. • Melihat iklan bawaan AdMob sebagai sumber monetisasi pertama. Teknologi yang saya bayangkan mencakup Android Studio, Kotlin, dan Firebase (Auth, Firestore, Storage, serta Cloud Messaging untuk notifikasi). Silakan usulkan pendekatan lain bila lebih efisien, asalkan tetap ramah skalabilitas dan hemat biaya. Kriteria penerimaan: 1. APK debug dan source co...

    €22 / hr Average bid
    €22 / hr Oferta promedio
    13 ofertas

    I need an Android application that allows users to send and receive funds quickly, track their full transaction history, and handle multiple currencies inside a single, clean interface. Security is critical: log-in and every sensitive action must be gated by a traditional password plus a four-digit PIN flow. Core scope • Android-only build, coded in Kotlin or Java and compiled in Android Studio. • Real-time money movement between verified accounts. You may connect to an existing payment gateway or build REST endpoints; either way the transfer must settle instantly in a sandbox environment. • Persistent ledger so users can open “History” and filter by date, currency, or status. • Multi-currency wallet: balances, FX conversion at live rates, and clear...

    €274 Average bid
    €274 Oferta promedio
    91 ofertas

    Saya ingin membangun sebuah aplikasi media sosial berbasis Android yang dapat segera mulai menghasilkan pendapatan. Fokus awal saya adalah memiliki prototipe fungsional yang memungkinkan pengguna: • Mendaftar dan masuk (email atau Google Sign-In). • Membuat profil dasar dengan foto. • Memposting teks, gambar, dan memberi “like” atau komentar. • Melihat feed beranda yang diperbarui real-time. • Melihat iklan bawaan AdMob sebagai sumber monetisasi pertama. Teknologi yang saya bayangkan mencakup Android Studio, Kotlin, dan Firebase (Auth, Firestore, Storage, serta Cloud Messaging untuk notifikasi). Silakan usulkan pendekatan lain bila lebih efisien, asalkan tetap ramah skalabilitas dan hemat biaya. Kriteria penerimaan: 1. APK debug dan source co...

    €34 / hr Average bid
    €34 / hr Oferta promedio
    13 ofertas

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