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!

From 243,608 reviews, clients rate our Java Developers 4.9 out of 5 stars.
Hire 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!

From 243,608 reviews, clients rate our Java Developers 4.9 out of 5 stars.
Hire Java Developers

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    We have an Android app (TC58) that prints ShipStation shipping labels (4x6 PDF) to a Zebra mobile printer over Bluetooth. We need a definitive fix for unreliable PDF Direct printing and a robust default path that works across power cycles and app sessions. Current setup Device: Zebra TC58 (Android handheld) Printer: Zebra mobile thermal printer (Link‑OS 6.x) over BLE Labels: ShipStation 4" x 6" PDFs (~63 KB) SDK: Zebra Link‑OS Android SDK (Bluetooth + FileUtil/sendFileContents) What we’ve tried and observed We toggle (PDF Direct) per print: set to pdf before print, none after. This is wrong per Zebra docs; only applies after a printer restart. After the first successful label, subsequent prints often fail silently (no label) or “corrupt” printer state ...

    $136 Average bid
    $136 Avg Bid
    18 bids

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

    $424 Average bid
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    143 bids

    I need a secure and efficient mobile app for both iOS and Android that integrates with personal NAS systems. Key Features Required: - File synchronization: Ensure that files are consistently updated across devices. - Access management: Control who can view or edit files. - Data encryption: Keep all data secure during transmission and storage. Ideal Skills and Experience: - Proven experience in mobile app development for both iOS and Android. - Strong background in NAS and remote storage technologies. - Expertise in implementing security features like data encryption and access management. - Familiarity with synchronization protocols and ensuring data integrity across platforms. Looking for a developer who can deliver a user-friendly, secure, and reliable app within budget. Please provi...

    $33 / hr Average bid
    $33 / hr Avg Bid
    113 bids

    I'm a Full-Stack Developer with 8+ years of experience designing, building, and scaling web applications across the MERN and modern JavaScript ecosystem. My work spans end-to-end product engineering — from architecting backend services and APIs to building responsive, performant frontends used by real users in production. My expertise lies in backend engineering, RESTful and event-driven architectures, database design, and cloud infrastructure. I also work extensively across frontend systems, state management, and CI/CD-driven delivery. Over the years, I have: Built and maintained scalable backend services using Node.js and Express, handling REST APIs, authentication, and business logic for production applications Developed dynamic, responsive frontends using React.js and , inc...

    $10 / hr Average bid
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    38 bids

    Turkish Senior React + Node Developer for an AI EdTech Platform (Türkiye only) ReadMate is an adaptive English reading platform for schools, running as a Teknokent R&D project. The MVP works. We need a senior developer to extend it and take it to production. Stack: React, Node.js / Express, PostgreSQL, REST APIs, LLM (AI) integration. Scope of work: Extend the existing React + Node/Express + Postgres codebase Build out AI features: on-demand text simplification and an end-of-book AI debate tutor Harden the platform for school deployment: role-based access across six user types, analytics dashboards, testing, CI/CD [Estimated hours per week / project duration] You must have: 5+ years of senior-level React and Node.js/Express work Strong PostgreSQL schema design and query optim...

    $6822 Average bid
    $6822 Avg Bid
    90 bids

    Basically, i need an Android application where channel partners can register/login, submit their details and required documents, track the progress of their application through different stages, upload the installation proof once the project is completed, and receive status updates via notifications. The backend and APIs will be developed by your team, and our scope will be to develop the Android app, integrate all the APIs, and publish it on the Play Store. Based on the timeline of 10 -15 days This estimate should cover the complete Android app development, API integration, testing, and support for publishing the app on the Google Play Store

    $15 / hr Average bid
    $15 / hr Avg Bid
    40 bids

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

    $273 Average bid
    $273 Avg Bid
    51 bids

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

    $423 Average bid
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    151 bids

    I’m moving the Dynamo initiative at Handshake AI into its next phase and I need a seasoned Python developer to write production-ready machine-learning algorithms that slot straight into our existing codebase. The heavy lifting is pure code development—no data wrangling or system plumbing—so I expect clean, well-documented Python modules that import neatly and respect our current project structure. You’ll work against the latest commit in our private Git repo, build out the ML logic we’ve specced (classification and ranking models to start), and deliver passing unit tests so the CI pipeline stays green. Feel free to lean on scikit-learn, PyTorch, or TensorFlow if they keep things elegant and maintainable; the end goal is fast, accurate models that can be calle...

    $96 Average bid
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    23 bids

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

    $131 Average bid
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    86 bids

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

    $620 Average bid
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    94 bids

    We are looking for an experienced Full-Stack Java Trainer with strong expertise in Java, Spring Boot, REST APIs, and either React or Angular. The ideal candidate must have successfully completed Karat certification/assessment and should have prior experience delivering corporate training to professionals. Required Skills: Core Java & Advanced Java Spring Boot, Spring MVC, Hibernate/JPA RESTful API Development React.js or Angular HTML, CSS, JavaScript, TypeScript SQL (MySQL/PostgreSQL) Git, Maven/Gradle Microservices (preferred) Good understanding of software development best practices Mandatory Requirements: Karat Certified (or successfully completed the Karat assessment) Proven experience as a corporate trainer or technical mentor Strong communication and presentation skills Abili...

    $50 / hr Average bid
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    28 bids

    I need a developer who can turn my intraday stock-trading logic into a fully automated system inside the Fyers automation environment. The priority is simple and clear: once my entry parameters are met, orders must be sent to the Fyers API automatically—no manual clicks. Key expectations • Use Fyers automation tools and endpoints exclusively, wiring in any authentication, token refresh, and order-routing flows so the bot can run unattended during market hours. • Focus on placing trades automatically; position monitoring, reports, or other extras are not required at this stage. • Build the logic cleanly so I can later plug in new entry/exit rules without rewriting the framework. • Deliver well-commented source code, a short README that shows setup steps, a...

    $97 Average bid
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    33 bids

    I'm looking for an experienced developer to create a custom bounty SMP plugin for Minecraft Java Edition on PaperMC. The plugin should include a system called "Bounty Credits." You earn 10 bounty credits for each bounty kill, which is defined as completing a bounty task. Key Requirements: - Bounty Credits System: Award 10 credits per bounty kill. which every 10 credit you get a extra heart until you reach 20 hearts and then you get permanent strength and speed 1 credits cap at 200 - Customizable bounties: Ability to set, manage, and complete bounties. - Multiple management commands: Develop several commands for bounty management. Ideal Skills and Experience: - Proficient in Java and Minecraft plugin development. - Experience with PaperMC and its ecosystem. - Strong command...

    $133 Average bid
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    87 bids

    I need twelve Android users to help me measure how my app affects battery life during heavy, real-world use over a 14-day window. The sole focus is performance, specifically battery usage when the phone is under high-usage pressure—think continuous video streaming, navigation, gaming, or other power-hungry tasks. What you’ll do • Install the latest build from Google Play (link provided after hire). • Use the app for at least two hours each day while your device is already running another intensive activity. • Capture screen recordings or annotated screenshots that show battery percentage at the start and end of every session. • Export Android battery stats and simple logcat excerpts once daily (I’ll share clear, step-by-step instructions&mdash...

    $5 / hr Average bid
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    59 bids

    I have a list of Discord servers operating in different countries and languages. The job is to send direct messages to users across each listed server. The message content will be customized for every server, with versions prepared in 10 different languages. Pricing Required 1. Test Run Send 1,000 test messages so I can evaluate whether your method works and whether the messages are successfully delivered. 2. Full Campaign Send 10,000 messages per month for 5 months. Total volume: 50,000 messages. Scope of Work You will handle the entire operation from start to finish, including the required accounts and setup. I will provide: graphics, message content, server links, instructions showing which message and language should be used for each server. The contract may be expanded if ...

    $22 Average bid
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    39 bids

    AI-Powered Customer Support Web Application Project Description We are looking for an experienced AI developer to build a modern web application with an AI-powered customer support assistant. The application should provide accurate responses based on a knowledge base and offer an intuitive user experience for both customers and administrators. Project Scope Develop a responsive web application. Integrate a large language model (LLM) through a suitable API. Implement a chatbot capable of answering questions using uploaded documentation. Create a secure admin dashboard for managing content and users. Develop RESTful APIs for frontend and backend communication. Build a searchable knowledge base. Implement user authentication and role-based access. Optimize application performance and securi...

    $2705 Average bid
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    177 bids

    I need a production-ready chat agent that can handle frontline customer support in real time, generating dynamic answers instead of fixed scripts. The bot must: • Draw live information from my customer database, product catalog, support articles, and a separate set of internal training documents. • Create quizes, or downloadable PDFs in the users chosen language • Interpret a user’s intent, pull the correct data, and reply conversationally in clear English. • Maintain context across a session, hand off to a human seamlessly when confidence drops, and log the full conversation for analytics. You are free to build with Dialogflow, Rasa, LangChain, OpenAI, or a comparable NLP framework as long as you can deploy it to our existing platform (JavaScript - SEEDL) a...

    $2925 Average bid
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    227 bids

    **Title:** Python Developer — Build Open-Source AI Agent Evaluation Framework (Supply Chain) **About the project:** Building an open-source evaluation framework that tests how well AI agents make supply chain planning decisions. Final output will be a public GitHub repository. Not a commercial product — a research artifact. **What you will build:** - A synthetic supply chain dataset generator (network, vendors, BOM, demand) - 2-3 decision problem families (demand planning, replenishment, procurement) - A reference solver in Pyomo + HiGHS to compute optimal answers - An evaluation harness that scores any AI agent against the reference - 3 baseline agents: one LLM-based (LangGraph + Claude/GPT), one optimization-only, one heuristic - A scoring module measuring quality, reliabil...

    $438 Average bid
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    225 bids

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

    $17 / hr Average bid
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    142 bids

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

    $79 Average bid
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    57 bids

    Karat Interview Preparation This training program is designed to help participants prepare for technical interviews conducted on the Karat platform. The program focuses on strengthening problem-solving skills, coding proficiency, data structures and algorithms, system design fundamentals, and effective interview communication. Participants will gain hands-on experience through mock interviews, coding exercises, and personalized feedback to improve their technical and behavioral interview performance. The objective is to build confidence and equip candidates with the skills required to succeed in real-world technical interviews.

    $37 / hr Average bid
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    5 bids

    "I am a lawyer based in Gujarat. I need a custom Document Automation Software. I already have the front-end HTML ready. I need a developer to integrate Aadhaar e-KYC API (using providers like Digio, Signzy, or Sandbox). When I input an Aadhaar number, it should fetch details via OTP and auto-fill the Gujarati document templates. Final output should be in PDF/Word format. Indian developers who understand Gujarati language constraints are preferred."

    $2 / hr Average bid
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    12 bids

    I have worked as a Software Quality Analyst with 1 year of professional experience in testing web and mobile applications. During my tenure, I independently managed QA activities for multiple client projects, including serving as the sole QA resource on three applications across the EdTech and Transportation domains. My work included: Designed and executed 500+ manual test cases Reported and verified 250+ defects Performed Functional, Regression, Smoke, Sanity, Integration, UAT, Cross-Browser, Responsive, and Mobile Testing Conducted REST API Testing using Postman Prepared Test Plans, Test Cases, RTMs, Test Execution Reports, and Bug Reports Collaborated directly with developers and clients to validate features and ensure successful releases I have also built a personal QA portfolio fea...

    $5 / hr Average bid
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    14 bids
    BattleHub app
    4 days left

    I’m ready to bring a new social-networking experience to Android and need a developer who can take it from concept to a polished, downloadable APK. The focus of this first release is simple but critical: real-time one-to-one and group messaging. Users should be able to register quickly, find contacts, and exchange text, images, and short videos with reliable push notifications. I’ll provide the basic wireframes and brand assets. You’ll turn them into a clean Material Design interface, build the back-end (Firebase or another lightweight, scalable solution you’re comfortable with), and hook up the messaging logic with end-to-end encryption. Key deliverables: • Full Android Studio project with readable, well-commented code • Secure user authentication, cl...

    $105 Average bid
    $105 Avg Bid
    25 bids

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

    $10 / hr Average bid
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    54 bids

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

    $314 Average bid
    $314 Avg Bid
    78 bids
    Batocera Game Management
    4 days left
    Verified

    I need assistance with adding and managing NES/SNES retro console games on Batocera. Key tasks include: - Adding NES/SNES games - Organizing game libraries - Ensuring proper emulator configuration for new games Ideal skills and experience: - Familiarity with Batocera - Experience with NES/SNES games - Knowledge of emulator configuration

    $140 Average bid
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    73 bids

    Real‑Time Market Replication Platform (API Integration + Matching Engine) We are building a real‑time market replication platform that synchronizes external market data through API integration and manages user balances, exposure, and order execution through a custom matching engine. The platform will include: API data ingestion (real‑time external market feed) Liquidity mirroring (synchronized price ladder and market depth) Matching engine (order execution, partial fills, queue management) Wallet ledger (balances, transactions, exposure tracking) Risk/exposure logic (per‑user and global limits) Admin tools (market controls, user management, reporting) Audit logs (full traceability of operations) We are looking for experienced backend developers or small teams with strong knowledge of: dis...

    $12 / hr Average bid
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    173 bids

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

    $20 / hr Average bid
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    131 bids

    Hiring Experienced Freelance IT Trainers **Informatics Corporate Training** is looking for passionate and experienced **Freelance Technical Trainers** to deliver high-quality training programs in both **online and offline** modes. ### Technologies Required * Java Full Stack * Python Full Stack * Web Development * Data Analytics * AI & Machine Learning * Generative AI (Gen AI) * Data Science * Google Cloud Platform (GCP) * AWS & DevOps * Microsoft Azure * .NET * Digital Marketing * ServiceNow ### Responsibilities * Deliver engaging, industry-oriented training sessions. * Explain concepts with practical examples and hands-on projects. * Guide students through assignments, projects, and interview preparation. * Share updated course content aligned with current industry trends. #...

    $11 / hr Average bid
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    30 bids

    I need twelve Android users to help me measure how my app affects battery life during heavy, real-world use over a 14-day window. The sole focus is performance, specifically battery usage when the phone is under high-usage pressure—think continuous video streaming, navigation, gaming, or other power-hungry tasks. What you’ll do • Install the latest build from Google Play (link provided after hire). • Use the app for at least two hours each day while your device is already running another intensive activity. • Capture screen recordings or annotated screenshots that show battery percentage at the start and end of every session. • Export Android battery stats and simple logcat excerpts once daily (I’ll share clear, step-by-step instructions&mdash...

    $7 / hr Average bid
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    48 bids

    I have a WordPress website that needs some fixes. Their number is not large, but the explanation itself is HUGE. So, you must be willing to do a lot of reading; a whole lot

    $91 Average bid
    $91 Avg Bid
    420 bids

    I need twelve Android users to help me measure how my app affects battery life during heavy, real-world use over a 14-day window. The sole focus is performance, specifically battery usage when the phone is under high-usage pressure—think continuous video streaming, navigation, gaming, or other power-hungry tasks. What you’ll do • Install the latest build from Google Play (link provided after hire). • Use the app for at least two hours each day while your device is already running another intensive activity. • Capture screen recordings or annotated screenshots that show battery percentage at the start and end of every session. • Export Android battery stats and simple logcat excerpts once daily (I’ll share clear, step-by-step instructions&mdash...

    $5 / hr Average bid
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    70 bids

    I’m a full-stack developer trainee who learns best by rolling up my sleeves and coding, so I’m looking for a tutor who can guide me through the complete web stack and accelerate my progress. The sessions must cover all three pillars—front-end, back-end, and database management—because I want to understand how every layer connects when building a real-world application. Front-end work will revolve around modern JavaScript/TypeScript frameworks (React, Vue, or Angular are all fine), component architecture, state management, testing, and performance tuning. For the back-end, I’d like to get comfortable with Node/Express or comparable frameworks, dive into RESTful API design, authentication, deployment, and containerisation basics. On the data side, we’ll ...

    $36 Average bid
    $36 Avg Bid
    15 bids

    so i want to build, an exe software, which will use my vpn - you can find out which vpn is best, it connect to united states or uk, which ever i select and then go on google search, and search keyword, i will provide 10 to 20 keywords, everytime, search a different keyord, and i will provide the domain name, which are running google ads, and only click on those domain one by one, on all, and then close everything, connect to another usa state or city in vpn and repeat the process until i stop it, but it only click on the domain which i enter in the starting

    $15 Average bid
    $15 Avg Bid
    8 bids

    My language-model experiments have finished training and I now need a junior engineer who can dive into the results and turn raw logs into clear, actionable insights. All work centers on text data that has already been pre-cleaned and trained; your focus is firmly on the post-training stage. You will • parse evaluation logs, confusion matrices, and attention weights coming from Python pipelines, • calculate and visualise key metrics (accuracy, F1, perplexity, BLEU, etc.), • compare successive model checkpoints, • write concise reports that highlight strengths, failure cases, and concrete next-step recommendations, • automate the above in repeatable Python or Java scripts so future runs can be analysed just as easily. Required know-how: solid Python (pandas, NumPy...

    $31 / hr Average bid
    $31 / hr Avg Bid
    42 bids

    I need a full, production-ready fork of the open-source Signal project, re-architected as a set of container-friendly Go microservices. The goal is to keep the rock-solid end-to-end encryption that Signal offers while gaining the flexibility, horizontal scalability, and deployment speed that a Go-driven service mesh provides. Project Overview We are building a next-generation secure communication platform based on the open-source Signal ecosystem. Our goal is to create a production-ready platform that supports millions of users while preserving Signal's proven end-to-end encryption. We are looking for senior engineers with experience in distributed systems, Go, Java, cloud infrastructure, and large-scale backed development. What do you want to add to…? Technology Stack •...

    $341 Average bid
    $341 Avg Bid
    43 bids
    Senior Interview Proxy Needed
    3 days left
    Verified

    I have a steady stream of recruiter, technical and HR screening calls coming up and need an experienced web-development professional who can step in for me on each one. The conversations cover full-stack topics, most often in Java, C#, Python and React Native, with occasional .NET questions. Your task is simple: join every scheduled call on my behalf, answer confidently, and carry the discussion through to the next stage until a formal offer is issued in my name. You should be able to speak to at least six or seven years of end-to-end web-development experience, explain project architecture decisions, discuss common design patterns, and handle soft-skill questions during HR screenings just as comfortably as the technical deep dives. Reliable English fluency and a calm, professional pho...

    $470 Average bid
    $470 Avg Bid
    36 bids

    I'm looking for an experienced developer to create an AI-powered stock trading system focused on swing trading. The system needs to incorporate several key features to ensure efficient and effective trading. Key Requirements: - Implement swing trading strategies. - Focus exclusively on the stock market. - Primary features: - Real-time data analysis - Automated trade execution - Comprehensive risk management tools - Trade accuracy 80%+ - Stop loss at 1% without exception Ideal Skills and Experience: - Strong background in AI and machine learning. - Proven experience in developing trading algorithms, specifically for swing trading. - In-depth knowledge of the stock market and trading dynamics. - Expertise in real-time data processing and risk management techniques. - Profici...

    $2684 Average bid
    $2684 Avg Bid
    114 bids

    Hiring: Senior Java Backend Freelancer – Spring Boot | Microservices | Kafka | Travel Booking Domain Location - Bengaluru only Hi, I am looking for an experienced Java Backend Freelancer to contribute to a Travel Booking Management project built on a microservices architecture. The technology stack includes Java, Spring Boot, Microservices, Kafka, Pub/Sub, orchestration, and service-to-service communication. Required Skills Java 8/17 Spring Boot Microservices Apache Kafka Pub/Sub Model Service-to-Service Communication Orchestration Patterns REST APIs Event-Driven Architecture The project consists of multiple services and complex workflows, so I am looking for someone who can quickly understand the overall architecture and contribute effectively. Prior experience with travel, ai...

    $174 Average bid
    $174 Avg Bid
    37 bids

    **Project FRIDAY – Seeking AI Engineer to Help Design an AI Wearable Assistant MVP** **Project Overview** I'm the founder of **Project FRIDAY**, an early-stage AI wearable assistant focused on improving independence for blind and visually impaired people. Our goal is to build a hands-free AI assistant that combines computer vision, speech recognition, natural language understanding, and voice guidance to help users: * Detect and identify nearby objects * Read signs, labels, and documents aloud * Answer questions about their surroundings * Provide basic navigation assistance * Continue functioning with limited internet connectivity through an edge-first AI architecture We recently received feedback from a startup pitch encouraging us to narrow the MVP, so our current focus i...

    $25 Average bid
    $25 Avg Bid
    34 bids
    AI Document Analyzer & Search
    3 days left
    Verified

    I’m building an AI-powered service that can read batches of PDFs, Word files, and spreadsheets, then instantly surface the information I ask for. The core functions I need are: • Accurate data extraction from those three file types • Concise English-language summaries generated on demand • Reliable keyword and phrase identification that feeds a searchable index Everything will run in English for now, so no multilingual processing is required. I’m open to whichever stack you prefer—Python, Node, or another language—as long as modern NLP libraries (think PyPDF, docx, pandas, spaCy, transformers, LangChain, etc.) are used cleanly and the code is well-commented. Here’s how I picture the workflow: I upload a document or folder, the system pars...

    $81 Average bid
    $81 Avg Bid
    67 bids

    I need a full, production-ready fork of the open-source Signal project, re-architected as a set of container-friendly Go microservices. The goal is to keep the rock-solid end-to-end encryption that Signal offers while gaining the flexibility, horizontal scalability, and deployment speed that a Go-driven service mesh provides. Project Overview We are building a next-generation secure communication platform based on the open-source Signal ecosystem. Our goal is to create a production-ready platform that supports millions of users while preserving Signal's proven end-to-end encryption. We are looking for senior engineers with experience in distributed systems, Go, Java, cloud infrastructure, and large-scale backed development. What do you want to add to…? Technology Stack •...

    $267 Average bid
    $267 Avg Bid
    22 bids
    Proxy Partner For HR Calls
    2 days left
    Verified

    I have a full pipeline of recruiter screens and HR‐focused interviews for senior Java roles and I need a trusted partner who can sit in on those calls for me. Your spoken English must be clear and confident enough to handle small talk, salary discussions, and cultural-fit questions without raising eyebrows. When recruiters ask about technical background you will lean on my profile: 7–8 years of hands-on work with Java as the primary language, plus solid exposure to C#, Python, .NET and React Native. HR conversations should naturally showcase team collaboration, communication, leadership and light people-management stories; I will provide real project scenarios and achievements you can reference. No live coding is expected on these calls, but you should be comfortable answering bro...

    $434 Average bid
    $434 Avg Bid
    31 bids

    I need a standalone utility app built specifically for Android. This will not be a game or social platform; rather, it should help users handle everyday productivity or finance-related tasks with a clean, intuitive interface. I will provide the feature list, basic wireframes, and any necessary API documentation. I’m expecting you to handle: • Native Android development (Java or Kotlin) • UI implementation that follows current Material Design guidelines • Connection to the supplied RESTful endpoints and local data caching for offline use • Basic analytics and crash reporting setup When we finish, I want a fully functional APK, source code in a Git repository, and concise setup notes so I can compile it on my end. If you have shipped similar utility apps be...

    $282 Average bid
    $282 Avg Bid
    99 bids

    I need an Android APK that predicts Aviator game outcomes and automatically references my Telegram channel for updates and community support. The heart of the app must be a rule-based prediction engine built around real-time market analysis and indicators I will supply. No machine-learning black boxes—every rule should be transparent so I can tweak thresholds later. Alongside the APK, I also want a lightweight key-generator desktop tool (Windows preferred) that produces unique activation keys. On first launch, the APK should prompt for one of these keys, validate it locally, then unlock full functionality. This licensing step is crucial for controlling distribution. Deliverables • Signed Aviator prediction APK with integrated Telegram deep-link (I’ll provide the channe...

    $41 Average bid
    $41 Avg Bid
    15 bids

    I need a compact, reusable module that fires push notifications, in-app banners, device vibration, and audible alarms on both iOS and Android. The goal is to drop this code straight into an existing mobile app, expose a clean API, and have every alert behave consistently across the two operating systems. Here is the core workflow I have in mind: • From my app I call a single method with a payload (title, body, priority, sound, vibration pattern). • Your module decides—based on simple rules in code—whether to show a push, an in-app banner, start vibration, play an alarm tone, or any mix of those. • On iOS it should leverage APNs for pushes and local notifications for everything else; on Android, FCM and the native notification manager. • All alerts mu...

    $9 / hr Average bid
    $9 / hr Avg Bid
    72 bids

    I have a sizeable collection of publicly available PDFs that all follow the same template, and I need their text contents extracted in bulk for research. The job is straightforward: crawl or batch-download the files, parse each document, and return clean, structured text that I can drop directly into my analysis pipeline. Because the layout is consistent across every PDF, you can rely on positional cues or pattern-based parsing rather than complex heuristics. OCR should be unnecessary—native text extraction with a Python stack (, PyPDF2, or similar) or a Java/Node alternative is fine as long as the output is accurate. Deliverables • A reusable script or small utility with clear instructions • Sample output (JSON or CSV) showing the full text from at least a handful of...

    $947 Average bid
    $947 Avg Bid
    199 bids

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