Java is an object-oriented, general purpose programming language used to create and develop a wide range of software applications ranging from simple desktop programs to full-fledged enterprise solutions. Java enables developers to create programmable components and modules that can be easily reused and provide high levels of security, scalability, and reliability. It is one of the most popular programming languages in the world today and due to its cross-platform features, is found on many different devices.

What can a Java Developer do for a client? As an experienced Java Developer, you are able to provide assistance in designing and implementing software applications with high levels of quality. With your expertise, you are able to create solutions that run on any platform and integrate with external applications such as databases with ease. From creating high-performance web applications to redesigning existing solutions with the latest technology stack, clients can hire you for a variety of development needs.

Here's some projects our expert Java Developers made real:

  • Developed complex enterprise solutions, from the back end to the front end
  • Created mobile solutions for both Android and iOS platforms
  • Designed secure software architectures designed to scale
  • Built detailed business logic in custom software systems
  • Connected backend databases with various frontend solutions

With so many development options available with Java, it's no wonder it's such a widely used programming language today. Our experienced Java Developers have superior programming skills that help create solutions of all scopes and sizes -- whatever your needs may be. Get your perfect project at Freelancer.com by hiring an expert programmer who has the skills you need to turn your ideas into reality. Post a project today and find a qualified Java Developer to bring your project life!

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    328 trabajados encontrados, precios en USD

    Nos encontramos en la búsqueda de un Desarrollador Fullstack Senior para incorporarse al sector "Study Management" de nuestro cliente. El sector está compuesto por equipos ágiles responsables del ciclo de vida completo de las soluciones de TI que dan soporte a los procesos de negocio en la gestión de estudios. La persona seleccionada se integrará a un equipo ágil responsable del desarrollo y mantenimiento de soluciones de TI, muchas de las cuales son desarrollos internos y algunos de los principales paquetes de software. La persona participará en el trabajo evolución y mantenimiento de los sistemas existentes, así como nuevos desarrollos según sea necesario.

    $12 / hr (Avg Bid)
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    hola buenas tardes os comento tenemos un server de minecraft y le hemos echado el ojo a un mod llamado (mine piece) pero tiene varias cosas que no nos gustan entonces nos gustaria o bien si se pudiera modificar para que no esten o deshabilitarlas lo que nos gustan mucho son sus npcs y sus animaciones nos gustaria o bien modificarlo o hacer uno muy parecido

    $147 (Avg Bid)
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    Hola que tal busco alguien que me ayude a programar una aplicación para PC que tenga funciones de inventario entradas salidas compras reportes de movimientos de inventario generación de códigos de barras para artículos consultas de skus almacenaje de imágenes usuarios contraseñas consulta de artículos

    $482 (Avg Bid)
    $482 Oferta promedio
    40 ofertas

    Desarrollo de una aplicación para agregar un stream de datos KLV a un video, el resultado debe entregar un archivo MPEG-TS con 3 Streams (Video, Audio y KLV) Debe permitir recibir el video de una cámara (streming) y la telemetría de una antena GPS o desde archivo de video (mov, mp4, etc) y archivo KLV (csv, json, binario, etc) El KLV generado debe apegarse al Standard Stanag 4609. El video resultante es para reproducir en una aplicación de drones que muestra el video y en el mapa la animación del vuelo y el footprint de la cámara. La aplicacion se requiere para windows 11 y ubuntu en linea de comando.

    $584 (Avg Bid)
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    10 ofertas
    Ventas Producto 1 día left
    VERIFICADO

    Es un sistema de venta y almacenamiento solo le falta facturar tiene login y elimina, actualiza ,guarda datos etc. Todo lo demás también hacemos los proyecto jdk NetBeans

    $173 (Avg Bid)
    $173 Oferta promedio
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    Aplicación para técnicos de mantenimiento, funciona como agenda de trabajo, en el cual se podrá apuntar tareas de reparación pendientes y también tener un calendario con día y hora de las inspecciones del centro de trabajo. Contendrá un historial de las reparaciones finalizadas anteriormente. La aplicación será desarrollada de forma nativa en Android utilizando lenguaje Java y consumiendo una API para temas de backend. Si es posible me vendría tener el Código fuente de la aplicación y de la API, así como también diagramas de entidad relación y diagrama de clases

    $467 (Avg Bid)
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    20 ofertas

    Esta tarea se refiere al desarrollo de un sistema de control para un robot, mediante comandos de voz. El robot funciona con un sistema de navegación autónomo que se puede controlar también desde una plataforma. No obstante, habrá situaciones en las que será necesario realizar algunos cambios en su ruta o actividad, y estos cambios deberán realizarse mediante comandos de voz. **Hispanohablante- es imprescindible

    $946 (Avg Bid)
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    Busco a alguien interesado en el proyecto en el cual participaran más de 20 personas, la cual busca presentar algo basico pero entretenido a un publico general, con tematicas de cierta forma absurda pero que llame la atención, aclaro esto porque la tematica que voy a plantear es muy surrealista y de cierta forma un chiste, y por esa misma razon llama la atención. Mi proyecto se basa en series como Permadeath y Dedsafio, el cual plantea algo interesante y desafiante, la cual es poner a varios jugadores de Minecraft en un mundo con una dificultad creciente, el cual mientras pasan los días dentro del servidor el juego puede ir modificando o añadiendo nuevos enemigos dentro del juego, los cuales buscaran acabar a toda costa con la vida de los participantes co...

    $104 (Avg Bid)
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    4 ofertas

    Looking for a passionate Android developer Experience with messaging, WebRTC apps is a important Deep expertise in voice and video calling Experience of React Native is a plus

    $317 (Avg Bid)
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    10 ofertas
    Keycloak expert needed 6 días left
    VERIFICADO

    We are integrating Keycloack with our product and to speed up this activity we are looking for Keycloack and JAVA experts to support the team. Is important a good knowledge of Keycloack.

    $62 (Avg Bid)
    $62 Oferta promedio
    9 ofertas

    We are integrating Keycloack with our product and to speed up this activity we are looking for Keycloack and JAVA experts to support the team. Is important a good knowledge of Keycloack.

    $34 (Avg Bid)
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    4 ofertas
    Load Balancer In Java Netbeans 6 días left
    VERIFICADO

    Implementation Once you have decided on the type of algorithm to implement, you will need to start programming the system. The language you will use is Java using the Netbeans IDE. Here, your round-robin or weighted round-robin algorithm will be running on the load balancing machine (i.e. the load balancing program will be working on a single machine in its own project) while a number of node programs will be running on each of the nodes (separate machines or on the same machine if none available). Your system will need to at least consider the following functionality and messaging (in no particular order and not an exhaustive list): You will be expected to produce separate programs for: 1. The load balancer system. 2. General worker node. Do not hard code names, IP address, etc into t...

    $87 (Avg Bid)
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    4 ofertas
    Digital Signage Solution 6 días left
    VERIFICADO

    We are looking to create a digital signage solution, which will display content from CMS directly to an android app. You need to have experience of web development, and also android app development. More details will be given over chat.

    $14 / hr (Avg Bid)
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    I am an astrology student and looking for someone who can build an AI model astrologer chatbot/web site that will answer customer questions based on vedic astrology principles which will be provided by me in text(pdf books)/chart(image)/pdf format. I want to extract the principles into Python or Java or C++ codes. Also it can be desktop software whichever is easy and simple. Please let me know the approximate cost for this. Regards, Krishna.V

    $235 (Avg Bid)
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    I'm looking for an experienced Java programmer and developer Remote Position Full Time to assist with a project I'm currently working on. Specifically, this project requires the creation of a web application using the Java language. The code base is completely new, so someone who is capable of starting from the ground up is pivotal. In addition to programming and development using Java, knowledge of other technologies such as PHP, CSS, and MySQL will also be required. Any successful candidate must have a strong understanding of all these languages and frameworks as they will likely be required at some point during the project. I need someone well-versed in the Java language and perfectly comfortable with developing complex web applications. An eye for detail, creativity, and a...

    $825 (Avg Bid)
    $825 Oferta promedio
    12 ofertas
    Make a Whatsapp ChatBot 6 días left
    VERIFICADO

    Hi, Im looking for someone to make a WhatsApp chatbot for me. like foondamate USE #2189 IN YOUR BID like this:

    $71 (Avg Bid)
    $71 Oferta promedio
    6 ofertas

    Looking for an Android developer for multiple projects

    $1 / hr (Avg Bid)
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    6 ofertas

    I need a android app developer . About the project i upload a document. Kindly download the file and read everything clearly. This is simple project. If you do best i have long time work for you. Thank you

    $166 (Avg Bid)
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    Witaj, jesteśmy muzycznym portalem informacyjnym dla artystów, realizatorów dźwięku i oświetlenia. Potrzebujemy dokonać usprawnień portalu / portali w zakresie: 1. Rozwój aplikacji istniejących 2. Docelowo myślimy nad migracją do WordPress Wymagania: - Dobra znajomość PHP5.x i 7.x poparta minimum 2-3 letnim doświadczeniem - Znajomość CakePHP lub przynajmniej jednego z popularnych frameworków (Symfony, Laravel, Zend lub inne) - Dobra znajomość relacyjnych baz danych (preferowane MySQL/MariaDB) - Znajomość HTML oraz CSS - Znajomość języka JavaScript (ES5) oraz technologi AJAX Mile widziane: - Umiejętność pracy z poziomu CLI - Doświadczenie w używaniu framework-a CakePHP - Doświadczenie w używaniu biblioteki jQuery - Znajomość zagadnień związan...

    $1486 (Avg Bid)
    $1486 Oferta promedio
    10 ofertas

    I'm looking for an experienced Android developer to create an APK for a local audience. The application should have basic complexity with user friendly features and a fresh, modern design. This project requires someone with a deep understanding of the Android platform. The successful developer should be able to use their experience to customize a vibrant, well-designed application that both engages and meets the needs of our local users. They will be expected to work in a timely manner and provide technical support as needed. Our ideal candidate has experience developing graphics, code, and understanding of object-oriented principles. The ultimate goal is to create a reliable application that is easy to use and delivers a great experience for our local users.

    $32 (Avg Bid)
    $32 Oferta promedio
    3 ofertas
    mini graphic design project 6 días left
    VERIFICADO

    Hello potential contractors! I am looking for someone to complete a mini graphic design project for me. This is a project that requires animation with parallelism and transformation using OpenGL. I have a particular style in mind, so I'm looking for someone that can bring my vision to life. I'm looking for the result to be delivered in an animation file format. Thanks for your interest, and I look forward to receiving your offers. this is particularly done on windows.

    $23 (Avg Bid)
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    Saya bingung dengan alurnya. Server side menggunakan PHP, dan client side menggunakan Java. Saya butuh panduan untuk memahami alurnya dan menuliskan kodenya di kedua sisi

    $6 / hr (Avg Bid)
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    Full stack developer needed 6 días left
    VERIFICADO

    I have a program i have half-written and it was with selenium. I need someone to help me complete it!

    $8 / hr (Avg Bid)
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    Lookingn for server administrater for java application need to fast up application application is running to slow

    $19 (Avg Bid)
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    I am looking to hire a freelancer to help me create an Android app using OpenVINO format models. The OPENVINO models are basically what I got from the below repo- The above code uses two OPENVINO models- face detection and spoof detection. Once we pass an image or a video using a webcam, it creates a bounding box around the detected face and labels it as real/fake. I have tested the above code and it's working as expected. Now I need a simple android app integrated with the models as mentioned in the above code link. With this app, once a user will open the front camera, models should work and detect as they are working.

    $154 (Avg Bid)
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    selenium programmer 6 días left
    VERIFICADO

    i have a program i was writing in selenium that is not finished and i need it finished.

    $7 / hr (Avg Bid)
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    As a client, I am looking for help with an existing code base to implement a Task Offloading approach using cloudsim. We have a reference/base research paper that explains the concept. Our goal with this project is to use the existing code base to generate a simulation of the cloud environment, exploring the potential efficiencies of the approach. We need an expert who has experience with the CloudSim framework to get the most out of our resources and efficiently simulate the system. This freelancer will be responsible for executing the project from start to finish and ensuring that the output from the simulation is sourced in a timely manner.

    $84 (Avg Bid)
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    1 ofertas
    Asset Register 6 días left
    VERIFICADO

    I am looking for a freelancer to develop an asset register for me. This asset register needs to include software and have the additional feature of notifications and tracking. No data analysis is necessary. Ideally, I would like the asset register to be user friendly and easily accessible by any authorized personnel. Features required are: * QR Code / Bar Code Tracking * Accessories for Asset (sub level) * Maintenance Schedule (time based / periodic) * Mobile App (QR Code Scan) to retrieve Asset Information) * Asset categories and Groups * Reporting / Dashboard * Admin / Setting Functionality * Multi language - choose language for navigation and data columns * Data hosted on cloud server (SQL Server / Azure) The freelancer should be knowledgeable about asset management systems and hav...

    $4616 (Avg Bid)
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    I'm looking to create a food ordering system called EatMania. This mobile app will be specifically for Android users. Customers will be the main users of the system, although restaurant owners and admins will need to have a user account as well. A back-end server will not be required since all of the data will be kept in-app. Lastly, I want to include cash on delivery as a payment option, so customers can pay for their orders at the time of delivery. With this project, my goal is to simplify the process of ordering food so that customers can quickly and easily find what they're looking for, and conveniently pay for it when received.

    $4 / hr (Avg Bid)
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    I am looking for a highly talented and experienced freelancer to run a software project written in GoLang and Elixir. This project requires expertise in these two powerful programming languages. The project itself is a software application, and I already have an existing codebase to utilize for its development. The ideal freelancer will have professional-level experience in both languages, as well as a proven track record of successfully developed applications. If you are up to the challenge and have the qualifications needed, I encourage you to apply for this project. Thank you for your interest in this project.

    $33 (Avg Bid)
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    Hi, We are looking for a full stack developer with experience in Golang and React js. Please bid only developers with more than 3 years of exp with Golang and React. Thanks

    $16 / hr (Avg Bid)
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    14 ofertas
    Manual Map DLL Into Memory 6 días left
    VERIFICADO

    I have an proxy wrapper dll i have kernel driver that do { read - write - allocate - protect } inside the memory with the process id i need an manual mapping code to use my driver so i can map my x86 dll into a process simple task

    $22 (Avg Bid)
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    2 ofertas

    I need programmer who know how to add payment gateways on v3cube

    $181 (Avg Bid)
    $181 Oferta promedio
    11 ofertas
    automate windows application. 6 días left
    VERIFICADO

    I want to start the application, insert Link, threads and hit start (icon) on windows application. After certain time, i want it to stop and close the application. I will send orders via url - the orders will contain, link, threads, time. I also want script to keep checking for new orders, and as soon as it receives order, it should return received to my url and execute the task. We may open application multiple times, according to the orders we get. The application, only works on my rdp. If you can work on rdp, only then bid.

    $177 (Avg Bid)
    $177 Oferta promedio
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    I'm trying to create a CD release pipeline in Github Actions for my Java Spring application and to deploy the output into an AWS Elastic Beanstalk application. I'm receiving errors and I need guidance/help.

    $42 (Avg Bid)
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    I neee help for creating application in Apache NetBeans

    $156 (Avg Bid)
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    Request details We are integrating Keycloack with our product and to speed up this activity we are looking for Keycloack and JAVA experts to support the team. Is important a good knowledge of Keycloack.

    $165 (Avg Bid)
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    13 ofertas
    OpenCBS Full Customisation 6 días left
    VERIFICADO

    We have a microfinance management software called OpenCBS that is relatively easy to install on a Windows computer. However, to use it, we need to install a database management system like SQL Express and Crystal Report Viewer for report visualization. We have four milestones to achieve: We need to analyze and deploy the existing OpenCBS source code found in two folders, client, and server. We need to customize the existing software to meet at least 50% of our specific requirements, focusing on the existing modules in the software. We want to rebrand the software to match our organization's branding guidelines. We need to develop new modules not found in OpenCBS, with a timeline for deployment, a rollout plan, and User acceptance testing (UAT). We will also maintain version contro...

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    need someone who can implement code for calculating CFG and PDG in Java. In areas static and dynamic slicing

    $30 (Avg Bid)
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    Programator React Native 6 días left
    VERIFICADO

    Căutăm colaborare pe termen lung pentru a realiza diferite update-uri pentru aplicația noastră mobilă care deja este publicată pe AppStore și Google Play. Android: Apple: Aplicația este construită în React Native și folosește Firebase.

    $18 / hr (Avg Bid)
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    52 ofertas
    Add some features to our chatbot 6 días left
    VERIFICADO

    We want to fine tune our bot so that users can narrow down their message categories using text links or form elements. We also want to parse the bot's replies so we can provide links to our detailed information, shopping cart and checkout pages as well as icons that show if the replies fit into certain categories.

    $498 (Avg Bid)
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    57 ofertas
    Senior Java Developer -- 2 6 días left
    VERIFICADO

    Well-versed with Java language, Core Java, Client-side programming, Server-side programming, and J2EE technologies. Knowledge of presentation languages such as JSP, HTML, Style Sheets, and JavaScript. Familiarity with AJAX, JQuery, and equivalent technologies Good understanding of relational databases, SQL & MySQL Understanding of Struts, Hibernate framework. Responsibilities and Duties Develop & implement new software programs. Maintain & improve the performance of existing software. Test & maintain software products to ensure strong functionality & optimization. Recommend improvements to existing software programs as necessary. Required Experience, Skills, and Qualifications. Qualifications and Skills Should have good written and verbal communication skills. He/ S...

    $307 (Avg Bid)
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    6 ofertas
    Convert C# Application into Python 6 días left
    VERIFICADO

    I'm looking for skilled developers to convert a C# application into Python 3.x. The C# application includes functions such aa only Web Requests. My ideal outcome is to have the project completed within a month - though I'm also open to hearing your estimated time frame.

    $279 (Avg Bid)
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    This plugin modifies the way different blocks work in minecraft. Using the ItemsAdder plugin (I can provide a version for testing), a special block is assigned to different blocks. This block will be written (either manually or via this plugin) to blockstates. Subsequently, when I call the item from the ItemsAdder, it will be this leaves, for example. Furthermore, this plugin will automatically convert already existing blocks to the default value (default value = Vanilla). This transformation would also take place in created worlds, preferably asynchronously. At the same time, vanilla functionality would be preserved for the new blocks. So, for example, sheet decay, etc. It is important that the plugin cooperates with plugins - Oraxen, ItemsAdder, WorldEdit. Furthermore, so that the plugin...

    $216 (Avg Bid)
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    5 ofertas

    I am looking for an experienced developer to create a complex, web application with extensive customization. The project requires expertise in Java, Spring MVC, HTML, CSS, and JSTL, as well as additional frameworks such as Java Spring. I expect a high level of customization for this project, and the developer should have an advanced understanding of these technologies in order to deliver the best possible results. If you have the skills and experience necessary to handle this project, I look forward to hearing from you soon. example:

    $343 (Avg Bid)
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    20 ofertas

    We required an Java + jBPM developer for a project . This is a web based application. Front End is React.js and back end is Java. We want to implement inrule jBPM for logic

    $317 (Avg Bid)
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    12 ofertas

    As a project, I'm looking for someone to create a Telegram scraper for me. I need the scraper to retrieve data on a daily basis, so I need someone with an eye for detail to ensure accurate and consistent results. The scraper should be written in Python so that it works optimally and provides me with exactly the kind of content I'm looking for. Thanks for your help.

    $102 (Avg Bid)
    $102 Oferta promedio
    12 ofertas
    Reskin app with source code 6 días left
    VERIFICADO

    I am looking for someone to help me reskin an app with existing source code. The source code I have is specifically for Android, so I need someone with expertise in that platform. I don't need any support with publishing the app as I already have a strategy in place, but I could use assistance in designing new graphics for the app. If you have experience with reskinning apps and making graphics changes, then I'd love to hear from you.

    $44 (Avg Bid)
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    18 ofertas
    Rental collection management 6 días left
    VERIFICADO

    I need a software for rental collection for my tenants and also include all the documents of tenants and there details and also it should be user friendly for both management and tenant.

    $1997 (Avg Bid)
    Acuerdo de Confidencialidad
    $1997 Oferta promedio
    20 ofertas
    APP PUBLISHER 6 días left
    VERIFICADO

    I am looking for a freelancer to help me publish an app for Android. The app is a game and I do not yet have a design for it. I'm looking for a reliable and experienced freelancer who can provide guidance and advice that can help me develop the app from concept to completion. The freelancer I hire will need to be able to create a design for the app, program it, test it, and get it approved for publishing on the Android app store. I'm looking for someone that can guide me through the entire process and help make sure that the app meets all the necessary requirements.

    $13 (Avg Bid)
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    3 ofertas

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