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 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 today!

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    236 份搜到的工作,货币单位为 HKD

    Se busca desarrollador, que hable español. Para desarrollar aplicación hibrida en Flutter para ios y android. La aplicación tendrá 5 nivele de usuarios, notificaciones en tiempo real, chat, foro, encuestas. Etapa demo no mas de 30 días.

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    I am in need of a ready-made AEPS payment and recharge app source code that has been developed for Android. I do not require any customization or additional features, as the existing features are sufficient. The preferred method of delivery for the source code is through direct file transfer. Ideal skills and experience for this job include: - Android app development - Experience with AEPS payment and recharge apps - Familiarity with direct file transfer methods for delivering source code.

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    I would like to hire someone to make a web application in Java that interacts with chatgpt , essentially using some credentialapi key doing the following: Sending messages Receiving respones Exposing a chat interface to the user JSPServlets prefered

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    I am looking for a freelancer to develop an app that will disable USB data connection on Android devices. The app should be compatible with Android only. It should not disable charging, only the data connection. The design and user interface should be simple and minimalistic for easy use. Ideal skills and experience: - Experience developing Android apps - Knowledge of device admin permissions - Expertise in UI/UX design for mobile apps - Ability to test and debug the app for optimal performance.

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    Need Simple App 6 天 left

    Read Details Before Applying. I am looking for a developer to create a simple Android app for me. The primary purpose of the app is to record phone calls in minimum Android version 6 to All latest Android version. I am open to suggestions from the developer regarding the design and functionality of the app. However, it must be user-friendly and easy to navigate. The ideal candidate should have experience in Android app development and be able to create a stable and reliable app. Attention to detail is important, as the app must be able to accurately record all phone calls. Overall, I am looking for a developer who can deliver a quality app within a reasonable timeframe. Don't bid above the project budget range just if you can do it in my budget. Please write Yellow on top of your p...

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    We use an open-source framework to make our proof of concept for our business. I want to use the CI/CD scripts released by the open-source project to enable them for our custom implementation. The open-source repository is: We would like to have the following things: - Automatic build and tests for pull requests. - Automatic build and deployment on AWS for a staging branch. - Automatic build and deployment on AWS for a production branch. All core components are built into docker containers. The build system is Graddle, compiling Java. The whole application is, in fact, a docker-compose that needs to be deployed to AWS EC2. All cloud formation scripts to start from scratch are available in the open-source repository. We will stick as close as possible to the upstream scripts. I need an ...

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    Android Studio: Debugging 6 天 left

    I am looking for a skilled Android Studio developer who can help me resolve code errors in my Java-based project. The ideal candidate should have experience in debugging and troubleshooting code issues. The project has a deadline of 3 days, so the candidate should be able to work efficiently under time constraints. Key requirements: - Strong knowledge of Java programming language - Expertise in Android Studio debugging - Ability to identify and resolve code errors quickly - Experience in UI/UX design is a plus If you meet the above criteria and are available to start working immediately, please submit your proposal with relevant experience and portfolio.

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    Olá a todos, já temos o aplicatico publicado na na google play, precisamos de um(a) programador(a), com experiência em admob, aplicativos criados em Android Studio/Java e firebase. Inserção de anúncios: Vários banners, anúncio de abertura, volta e saída de app. Recuperação de password a todos os usuários em ligações com firebase já construídas. Link da app: Qualquer dúvida digam :)

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    Dada antry 6 天 left

    I am looking for a skilled artist to create a Dada entry for me. The type of entry could be visual art, poetry, or performance art. For poetry, I may have a theme or a rough idea in mind, or I may be open to anything. For performance art, the piece should be less than 5 minutes, 5-10 minutes, or more than 10 minutes. Ideal skills and experience for this job include creativity, knowledge and understanding of the Dada movement, and the ability to bring the concept to life through the chosen medium.

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    Mobile Developer Freelancer 6 天 left

    Responsibilities: Work closely with our Technical architect and development teams in developing sophisticated Mobile Applications with highly usable and intuitive user interfaces. Requirements: • 5 - 8 years of strong Architecture and programming experience with Object Oriented Programming design patterns • Must have at least 3 years of experience in o Native Android o Flutter • Should be familiar with UI/UX guidelines from Apple and Google • Strong knowledge in Android UI design principles, patterns, and best practices • Proficient in source code version tools such as Git Hub, SVN, TFS • Strong verbal and written communication skills • Team player with experience of working with ethnically and geographically diverse

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    I am looking for a freelancer who can help me find publishers to upload my social media Android app. I do not have an existing Google Play Developer account, so I would prefer if the freelancer could use their account. The ideal candidate will have experience in finding publishers and uploading apps. The app requires user authentication as a specific feature. The freelancer should be able to ensure that the app is uploaded with all necessary features and functionalities, and any updates are taken care of in a timely manner.

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    Excel extract - API solution 6 天 left

    A simple stand alone solution is required to extract data from spreadsheet and pass the columns as json payload for API request body

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    Hello! I'm looking for an experienced Andriod Developer to create a Simple SUNMI V2 Printing APP. The app should be developed using Kotlin Or Java, and I already have a complete design for the app. Furthermore, I only require the development and testing of the app - no other services are needed. If you have experience in developing similar apps and think that you can handle this project well, please apply. I look forward to hearing from you!

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    WhatsApp Marketing Software 6 天 left

    I am seeking a freelancer to create a WhatsApp Marketing Software that should be able to send messages both automatically and manually. The software should have the following essential features: send WhatsApp messages for businesses Automation, Chatbot, WhatsAppTM Automation and Chatbot Simple WhatsApp automation to send a sequence of messages to convert customers. Chatbots that reply automatically to decrease support time. marketing software provider directly connected with WhatsAppTM Cloud API The ideal candidate for this project should have experience in developing WhatsApp marketing software and should be proficient in the following skills: - Web-based Development: The software should be web-based and should be compatible with all platforms. - WhatsApp API Integration: The develope...

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    I am looking for a skilled freelancer to create a native app from my existing webview app. The ideal candidate will have experience in app development for the Android platform . It is mobile website that we are calling in android. Now want the android app to work like native app but calling of the website remains the same. Key features: - Platform: Android - Existing webview app available - We will still call website but user should have native app like experience.

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    We are in need of a Java developer who can implement backend API security using OAuth 2.0. The project is moderate and needs to be completed within 2-4 weeks. We have an existing API that needs to be secured. The ideal candidate should have experience with OAuth 2.0 implementation and Java development.

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    I am looking for a Java web developer to integrate a RESTful API into the customer profile creation screen of the Mifos X web application for my client. The integration involves making API calls to verify the customer's identity. The API server will receive the customer's name, address, and ID document number as parameters, and in response, it will provide the ID verification status and transaction number. These details need to be stored in the customer profile master table in MIFOS' MySQL database. The developer should have knowledge of MIFOS' database structure and its service-oriented architecture to incorporate the additional API-related fields into the customer master. If the ID verification status is returned as "further due diligence required," the ver...

    $180 / hr (Avg Bid)
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    I am looking for a developer to create a simple game engine for a 2D game on PC using Java. The ideal candidate should have experience in game development and Java programming. The game engine should include the following features: - Basic physics engine - Sound effects and music - Sprite animations - Collision detection - User input handling Overall, I want a game engine that is easy to use and could create at least 2 simple games. The developer should be able to provide regular updates and be open to feedback.

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    app reskining 6 天 left

    I am looking for a skilled developer to reskin my Android Ecommerce app with minimal changes to the UI and graphics. The ideal candidate should have experience in Android app development and be able to work quickly and efficiently. Some additional requirements include: - Familiarity with Android Studio and Java programming language - Ability to customize existing UI elements and graphics - Good communication skills to provide regular updates on the project progress - Attention to detail to ensure a high-quality end product - Ability to meet project deadlines and work within budget constraints If you have the necessary skills and experience, please submit your proposal and portfolio for consideration. Thank you.

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    I am looking for a freelancer who can help me implement NTLM authentication with OkHttpClient in my android application. I have previous experience with NTLM authentication and require a standard implementation with no specific requirements or constraints. The project is urgent and needs to be completed within a week. Ideal Skills and Experience: - Strong knowledge of NTLM authentication - Experience with OkHttpClient - Proficient in Android development - Ability to work quickly and efficiently under tight deadlines

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    I am looking for a Java developer to create a metro website using graph data structures. The main purpose of the website is to provide information to commuters, including nearest stations. I am open to suggestions regarding the design and layout of the website. The graph data structure should include 1-3 lines and 10-30 stations. Ideal skills and experience for this job include: - Proficiency in Java - Experience with graph data structures - Knowledge of web development - Familiarity with metro systems - Attention to detail and ability to provide a user-friendly experience.

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    I am in need of a skilled developer to develop a software for a Conquer Online Private Server game. Specifically, I require improved mining capabilities for the game. Ideal Skills and Experience: - Knowledge of Conquer Online Private Server game - Experience with script and software management - Strong programming skills in languages such as C++, Java, and Python This is an ongoing project that will depend on patches, so I am looking for someone with a flexible timeline. Communication and collaboration will be key as we work together to ensure the software modifications are completed to my satisfaction.

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    Kafka Consumer 6 天 left

    Project Title: Kafka Consumer for Real-Time Data Processing We are looking for a freelancer who can help us build a Kafka Consumer for real-time data processing. Our goal is to process data from multiple sources in real-time and output the processed data in JSON format. Ideal Skills and Experience: - Strong experience with Kafka Consumer - Proficient in programming languages such as Java or Python - Experience in real-time data processing - Familiarity with JSON data format Specific Requirements: - Build a Kafka Consumer that can process data from multiple sources and multiple partitioned - Ensure the data is processed in real-time - Output the processed data in JSON format If you think you have the skills and experience we need, please send us your proposal. We are open to suggestio...

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    We are looking for a Java and Springboot developer who can assist in writing clean & scalable codes using Java.

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    Modification of existing opensource project on langchain, with custom LLM on gradio and opensource vector DB (hyperdb)

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    1. Introduction The purpose of this requirement document is to outline the specifications and functionality for developing a Restful API based on the open-source GitHub project, AppointmentScheduler (`). Additionally, the API will be integrated with a Telegram bot for enhanced functionality and user interaction. The Restful API will provide the necessary endpoints and functionality to manage appointments, while the Telegram bot will act as an interface for users to interact with the system. 2. Restful API Requirements The Restful API should be developed based on the AppointmentScheduler project, with the following key requirements: a. Endpoint for Appointment Creation - The API should provide an endpoint to create new appointments. - The endpoint should accept the ne...

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    Hello Friends, my current application was developed in c# ...i want same in android.. application have license manager and exe.. firebase is to be used and application code is on server regards

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    I am looking for a skilled developer to build various deep learning models for a classification problem involving time series data. The project requires expertise in Lstm, Bilstm, Cnn, Lstm+attention, and Resnet algorithms. The data has a shape of (1500,18000) and a dimension of 200x900. Ideal Skills and Experience: - Proficient in Python and deep learning frameworks such as TensorFlow and Keras - Strong understanding of Lstm, Bilstm, Cnn, Lstm+attention, and Resnet algorithms - Experience with time series data and classification problems - Ability to achieve high accuracy in classification - Detail-oriented and able to provide detailed documentation throughout the project. Dataset will be provided

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    Locket E-com 5 天 left

    E-commerce platform that can sell any product from anywhere in the world

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    I am in need of an Android developer who knows Gradle Tasks. My project requires immediate attention, as I am looking for someone who can help with debugging and optimization. The ideal candidate should have intermediate experience in development. Some of the skills I am looking for include: - Experience with Gradle Tasks - Proficiency in Android development - Knowledge of debugging techniques - Familiarity with optimization methods If you are a skilled developer with intermediate-level expertise, I would love to hear from you. Please apply with your relevant experience and skills, and we can take it from there. The actual error is Task "assembleglobalstagedebug" not found in the root project 'android' and it's subprojects. Looks like the mentioned tasks i...

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    Looking for expert developer in telegram bots. - ability to create complex bot store with many options - input Credit card and crypto gateway - creating client managing system - working with apis - client panel + admin panel Must have creative mind to help get this project alive. -

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    GPAY android 5 天 left

    I am looking for an android developer who can help me with integrating GPAY into my app. The ideal candidate should be proficient in android studio code and have experience with payment processing and user account management. The following features should be included in the app: - Ability to change/set the default card on GPAY - Feature for saving payment information As for integrating the app with other services, I'm not sure if I need assistance with that or not. Therefore, I'm open to discussing this further with the developer.

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    build for me admin login page 5 天 left

    I am looking for a developer to build a basic admin login page using Angular and Springboot. The page should have basic email and password authentication. No specific features are required. The ideal candidate should have experience with Angular and Springboot.

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    Mobile Application 5 天 left

    I am looking for a mobile application developer who can create an Android app that will be used for inventory mapping. The ideal candidate should have experience in developing Android apps and be able to implement barcode scanning. The app should be easy to use, and have a simple user interface. The following are the requirements for the app: - Platform: Android - Primary Function: Inventory Mapping - Features: Barcode scanning

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    We have Two Scripts to be written and integrated into existing Postgres database tables on AWS. Script 1’s primary job is to score individual user emotions according to rules in our requirements documentation and post results to various tables in Postgres. Script 1 may be run multiple times per day, producing intraday results that will be returned to our Loyalty partners and the systems of our Brand clients via our API (not part of the scope). Script 2’s primary job is to read the results of Script 1 from the Postgres tables and “classify” Users' history to date scores reflecting their individual emotional loyalty according to the rules in our detailed requirements documentation, then to update various Postgres tables with the results. We anticipate that Scrip...

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    ONLY ACCEPT TASK IF YOU ARE ABLE TO START WORK NOW AND COMPLETE IT IN A FEW HOURS, THIS INCLUDES MEETING ON ZOOM AND WORKING FROM MY LAPTOP REMOTELY. I am in need of a skilled developer to assist with white box unit testing in Java. The project requires expertise in JUnit 4 or 5 testing framework, as well as experience with git connection tasks. The ideal candidate should be able to complete the project as soon as possible. Skills and experience required: - Strong knowledge of Java programming language - Expertise in JUnit testing framework - Experience with git connection tasks

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    create a software 5 天 left

    I am looking for someone to conduct an intermediate-level cloud simulation in cloud computing. The purpose of the simulation is to conduct research and will be focused on the cloud computing

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    Estamos en búsquedas de un desarrollador con conocimientos sobre el despliegue de funcionalidades en Alfresco Comunity 7.1. Necesitamos realizar un fix sobre un desarrollo de “gestión de grupos”, puntualmente tenemos que mejorar el proceso de búsqueda de usuarios para agregarlos al grupo.

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    I am looking for someone to conduct an intermediate-level cloud simulation in cloud computing. The purpose of the simulation is to conduct research and will be focused on the cloud computing platform that the contractor feels most comfortable with. The simulation must be intermediate in complexity and be comprehensive enough satisfy the goals of the research. The contractor must have experience working with cloud computing platforms and have knowledge of the various features they offer. The successful candidate will have the experience and knowledge necessary to develop a successful simulation in order to meet the research goals.

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    I am in need of assistance for Selenium automation robot test creation, parallel execution, framework creation, best practices, Selenium grid, data-driven approach, and integration with CI/CD. I have a rough idea of what I want my framework to look like, but I need someone to help me create it. I prefer to use Java as my programming language for the Selenium automation. The applications I want to test are web applications. Ideal skills and experience for this job include: - Expertise in Selenium automation and frameworks - Strong knowledge of Java programming language - Experience with Selenium grid, data-driven approach, and CI/CD integration - Ability to create parallel execution test cases - Familiarity with best practices in Selenium automation - Experience testing web applications.

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    We are looking for a skilled developer who can prove a theory for us that we can create a emulated screen of a browser window (possibly using WebRTC or something similiar), showing every action of a user (clicking around, paginating, etc), and hiding the content of our chrome extension, that is on the parent screen, from the emulated screen. Real world example: - A user would use our solution to put sticky notes or Prompts on any web screen. - A user would then create a emulated screen of their browser window - The emulated window would show every action of the user BUT would not show the sticky notes or Prompts. Reason: A user would use our solution when they are presenting via screen share. The user would screen share the emulated window but work off the parent screen using the ...

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    I have employment application documents in adobe. We currently have 2 separate versions in english and spanish. I would like to created 1 PDf file that lets the signer choose the language of the actual document to sign. Once signed in whatever language chosen adobe should mark as completed.

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    scrape data from site 5 天 left

    I am looking for a Experienced Programmer to scrape data from website. Only highly experienced programmer. Completed details will be provided to shortlisted candidates only. Write CODE at the starting of your proposal.

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    I am seeking a freelancer to develop a clinical decision support medical application that will support critical care and infectious disease. The application needs to provide diagnostic and treatment recommendations to support clinical decision-making. I do not require integration with any specific EHR system, but a general solution is needed. Ideal skills and experience for the job include: - Strong knowledge of medical terminology and clinical decision-making processes - Experience in developing medical applications - Proficiency in programming languages such as Java or Python - Familiarity with EHR systems and healthcare data standards.

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    Sniff hls from android app 5 天 left

    I am looking for a freelancer who can help me sniff HLS data from a specific Android app, which I can provide the name of. I don't have a preference for programming language or platform, so the ideal candidate should be proficient in both Python and Java. The sniffed data will be used for research purposes, so experience in data analysis and visualization is a plus. The project requires knowledge of network protocols and security, as well as experience with packet sniffing and analysis tools.

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    Android Developer (Exposed Module)

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    Java springboot + CQRS pattern + Test coverage + ELK stack

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    My project is a simple IoT project using TCP/IP sockets in Flutter. I am building for both Android and iOS platforms. I have not decided yet if I need a server-side component or not; it might be needed if my requirements become more complex. I will be using cloud services as part of the project implementation. With this project, I am looking for a freelancer who can help me navigate the complexities of IoT programming and ensure that this project is successful. Thanks for considering my project!

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    Courear management software 5 天 left

    I am in need of a freelancer to develop a courier management software with the following features: - Real-time tracking - Automated invoicing - Delivery scheduling The software will require integration with third-party services or APIs. The project needs to be completed ASAP. Ideal skills and experience for this job include: - Strong proficiency in programming languages such as Java or Python - Experience with API integration - Knowledge of courier management systems - Ability to work efficiently under strict timelines

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    I would not like to use Teilio or lex. I am seeking an experienced programmer to assist me in creating a robo-call and text program for sending out reminder messages. The goal of this project is to set up the program to send out pre-written messages to a list of recipients at specific times or intervals. The content for these messages will be provided by me, so I only require assistance with setting up the program. The program must be capable of storing recipient information and messages sent in a database using database management systems like MySQL, MongoDB, or PostgreSQL. The freelancer should also understand and comply with relevant regulations, such as the Telephone Consumer Protection Act (TCPA) in the US, which governs the use of automated telephone calls and text messages. If you...

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