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!

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    335 trabajados encontrados, precios en USD

    Ocupo ayuda con 2 tareas sencillas en Kotlin.

    $35 (Avg Bid)
    $35 Oferta promedio
    6 ofertas
    Modificación Unicenta 4.6.2 -- 2 6 días left
    VERIFICADO

    1. Cambiar diseño y Colores del Programa . teclas para abrir cajon , no imprimir tickets. la opcion de impresion de recibos opcional en el inventario. impresion en Carta y pdf en todos los reportes. de Puntos (fidelizacion de clientes) Opensig web a esta version . .exe del programa para instalar todo de una vez. 8. entregar un instalador demo por 1 semana del programa

    $479 (Avg Bid)
    $479 Oferta promedio
    11 ofertas

    Busco un programador que sepa kotlin, la aplicación se encuentra en play store "Yo Nunca - Juego para Beber". Se necesita corregir errores e introducir mejoras.

    $11 / hr (Avg Bid)
    $11 / hr Oferta promedio
    17 ofertas
    Backend idioma Español 4 días left
    VERIFICADO

    Se requiere una persona que haga equipo con un grupo de desarrolladores como principar tener conocimientos mongoose, node, expresss se requiere docuemntar el proyecto y como opcion principal generar la refactorizacion, se requiere experiencia comprobable

    $104 (Avg Bid)
    $104 Oferta promedio
    14 ofertas

    Hola mi nombre es Gustavo Ceballos, Estoy realizando un proyecto para la maestría, soy del área de la salud, lo que queremos realizar es una app para celular y Tablet la cual conste de un avatar con un progreso en niveles, cada nivel va a tener tareas como de higiene, hidratación, lectura, nutrición y activación física, cada vez que el niño cumpla un reto lograra ir pasando los niveles, por cada nivel va a obtener monedas las cuales le servirán para comprar cosas para su avatar en una tienda virtual, es un proyecto para el área de salud, buscamos fomentar los buenos hábitos en los niños y que mejor que con un buen videojuego, también queremos que la app lance algunas alertas de cuando el niño se teng...

    $474 (Avg Bid)
    $474 Oferta promedio
    27 ofertas

    Buenos días. Buscamos un programadores que haga el mantenimiento de nuestras app.

    $221 (Avg Bid)
    $221 Oferta promedio
    29 ofertas

    El Ajolote en 3D Debe contener lo siguiente: Requerimientos mínimos: - Movimiento automático nadando. - Giros en eje que corresponda para que siga nadando hacia el fondo o frente y hacia la izquierda o derecha y arriba o abajo. - Textura Extras: - Luz Direccional - Agregar un movimiento personalizado. (ejemplo: caminar y hacerse el muertito)

    $85 (Avg Bid)
    $85 Oferta promedio
    5 ofertas
    Busco constructores 1 día left
    VERIFICADO

    Necesito constructores habilidosos para construir una ciudad en minecraft, no será demasiado grande ya que el proposito de la misma es usarla para roleplay. Interesados mandar sus portafolios

    $17 (Avg Bid)
    $17 Oferta promedio
    6 ofertas

    Necesito una aplicación Android que permita enviar y recibir solicitudes de pago entre usuarios sin compartir datos de acceso, mediante la simulación de toques para abrir la aplicación de pagos y completar la transacción. Adjunto los requerimientos:

    $354 (Avg Bid)
    $354 Oferta promedio
    13 ofertas

    1. Cambiar diseño y Colores del Programa . teclas para abrir cajon , no imprimir tickets. la opcion de impresion de recibos opcional en el inventario. impresion en Carta y pdf en todos los reportes. de Puntos (fidelizacion de clientes) Opensig web a esta version . .exe del programa para instalar todo de una vez. 8. entregar un instalador demo por 1 semana del programa

    $468 (Avg Bid)
    $468 Oferta promedio
    8 ofertas
    Grupo Kopler 12 horas left

    Nuestra empresa de publicidad se especializa en ofrecer servicios de diseño gráfico, manejo de redes sociales, creación de contenido, diseño web y software. Nos enfocamos en proporcionar soluciones creativas y efectivas para las necesidades de nuestros clientes en el mundo digital. Buscamos diseñadores gráficos altamente capacitados que pueden crear diseños atractivos y personalizados para lograr la imagen deseada de la marca. Además, nuestros especialistas en redes sociales pueden ayudar a nuestros clientes a aumentar su presencia en línea mediante la creación y gestión de contenido en múltiples plataformas. Nuestro equipo de creadores de contenido produce material innovador y relevante para mantener el ...

    $6 / hr (Avg Bid)
    $6 / hr Oferta promedio
    9 ofertas
    Busco programador(a) WHM 2 1 día left
    VERIFICADO

    Hola, para iniciar por favor escribe la respuesta de la pregunta al inicio de tu oferta. ¿Cuál es el número de el chavo? Estoy buscando una persona proactiva con experiencia en programación y WHM para trabajar en diferentes proyectos con la posibilidad de establecer un equipo para ofrecer otros servicios relacionados con el área. El postulante debe saber trabajar bajo ambiente Windows o Mac El puesto de trabajo es presencial con facilidades en el horario. El precio de la oferta es en base un mes de trabajo. Si la persona es diseñador gráfico o sabe algunos programas de diseño, es un plus. Nuevos en la plataforma de freelancer son bienvenidos. Buena Suerte!

    $476 (Avg Bid)
    Local
    $476 Oferta promedio
    3 ofertas

    I need to extract all the data from all the databeses in all these programs below from their sql database to an excel files. The links are below: نظام الاشتقاق والتصريف برنامج الخليل الصرفي المعجم الحاسوبي التفاعلي للغة العربية * استيعابه جميع جذور اللغة العربية، فقد احتوى على: (7,820) جذرًا ثلاثيًّا ورباعيًّا. * استيعابه جميع أفعال اللغة العربية، فقد احتوى على: (21,345) فعلاً ثلاثيًّا مجردًا ومزيدًا، و(2,320) فعلاً رباعيًّا مجردًا ومزيدًا. * استيعابه جميع المصادر السماعية للأفعال الثلاثية، فقد احتوى على: (11,970) مصدرًا سماعيًّا للأفعال الثلاثية. * قدرته على توليد جميع الأسماء المشتقة، والمصادر القياسية (للأفعال الثلاثية المزيدة، والأفعال الرباعية) اعتمادًا على قواعد الاشتقاق لا على قواعد المعطيات. * استغراقه جميع أبواب النحو والصرف المتعلقة بالاشتقاق وبتصريف الأفعال والأسماء...

    $19 / hr (Avg Bid)
    $19 / hr Oferta promedio
    9 ofertas
    Thiefimage -- 2 6 días left
    VERIFICADO

    Trying to get facial images enhanced well enough to use facial recognition software

    $192 (Avg Bid)
    $192 Oferta promedio
    10 ofertas
    Marketing team for paid marketing 6 días left
    VERIFICADO

    I am looking for a team to help me with some paid marketing for an affiliate link and funnel I would need help setting up from start to finish I already have my target audience just Need help setting up marketing for instagram facebook tiktok et cetera whatever would be most productive this Would be long term

    $5 / hr (Avg Bid)
    $5 / hr Oferta promedio
    6 ofertas
    Modify open source sip client 6 días left
    VERIFICADO

    we need a developer to modify any open source sip client for android and do this tasks 1. you can use the 3rd party app to rout the phone mic audio to the headphone jack 2. you need to modify any open source sip client to take a sip mic audio from phone speaker 3. you need to modify sip client to connect sip client speaker to headphone Budget 500 no more no less example In Sipdroid, the file that designates the audio source for the app is "". This file is located in the "" package within the Sipdroid source code. Within the "" file, there are several methods that are responsible for managing the audio sources used by the app. For example, the "getAudioSource()" method is used to retrieve the current audio source being used by the app, while the &...

    $529 (Avg Bid)
    $529 Oferta promedio
    15 ofertas
    KSL202303SVR 6 días left
    VERIFICADO

    Hi we are looking for Server configurator/ maintenance to run java applications . We need identitfying right size of Server. Installing required software Providing access to our workforce who are working in different locations.

    $85 (Avg Bid)
    $85 Oferta promedio
    1 ofertas
    Liferay 7.4 site subscription plan 6 días left
    VERIFICADO

    Hello, We are working on a Liferay CE 7.4 project, we are looking to add a website subscription plan for a certain user role to benefit from the website's services. Please contact us for more details if you are interested. Thanks.

    $30 (Avg Bid)
    $30 Oferta promedio
    1 ofertas
    Algorithms and DataStructures -- 4 6 días left
    VERIFICADO

    Solving few problems in algorithms and data structures.

    $23 (Avg Bid)
    $23 Oferta promedio
    17 ofertas

    I need a AI powered lead generation and engagement system software. I will need the software to 1. be able to do Data Acquisition on multiple Real estate lead sources like zombie properties, vacant properties, pre foreclosures, and distressed sellers to name a few. 2. preprocess and clean the data then feed it into an AI model 3. train machine learning to once data is collected and cleaned then it can be trained to predict which properties are most likely to be motivated sellers. 4. once the Ai has been trained and learned how to identify and create a list that meets specified criteria. 5. An AI-Powered system to send automated personalized messages using a chatbot or voice technology. with a built-in CRM to automatically record and track leads. for follow-up .

    $3974 (Avg Bid)
    $3974 Oferta promedio
    17 ofertas

    This is along term project, remote role with production support experience. Person should work in night shift from 7:00 pm IST to 4:00 AM. IST This is basically java project where we’re fixing the defects, we use sql db, IntelliJ, putty. Please read the description properly and do not come to me with other budget offers. My offer is between 20 to 30k based on the discussions we have for this project. Nothing more that described. This is a production support project and we need to solve defects daily. Even though we are not fixing the defects we should analyze and place our findings for the defects we get. Work will done through Zoom. Note: Salaries are paid only once at the end of month.

    $282 (Avg Bid)
    $282 Oferta promedio
    6 ofertas

    You have to modify this app You have to remove app ui , and it asks for chat I'd and bot token phone number etc you have to implement these things inside the code , just app open and ask for naccessry permission and it should open a web page like

    $12 (Avg Bid)
    $12 Oferta promedio
    1 ofertas
    programmering 6 días left

    We are a construction company in Norway and we need a program that can give us a clear price for all kinds of work. So we need a person who is very good with PC data who can make us such a program to help us with this.

    $547 (Avg Bid)
    $547 Oferta promedio
    44 ofertas

    Using Tgui libraries to develop the game

    $81 (Avg Bid)
    $81 Oferta promedio
    6 ofertas
    $115 Oferta promedio
    16 ofertas

    Hello i need help with writing scala unit test case using funsuite since i have written the codebase

    $27 / hr (Avg Bid)
    $27 / hr Oferta promedio
    3 ofertas

    more details will be in chat please start with "software"

    $105 (Avg Bid)
    $105 Oferta promedio
    27 ofertas

    Write or finish to write a code using the Structured Data or Object Oriented Programming for simple tasks or more complex projects. The projects may be selected according the difficulty and the time for obtain the program ready to send to the client.

    $22 (Avg Bid)
    $22 Oferta promedio
    9 ofertas

    I need a software that refreshes one website for a new option becomes available. When its available, it has to go to another website, find the option and place the bet. Then it has to send a Discord web hook saying it has been completed. I will message you with a more complete description.

    $373 (Avg Bid)
    $373 Oferta promedio
    48 ofertas

    Hello, We have setup a replication from MSSQL to MySQL. SymmetricDS auto creates the schema, but one table in source (MSSQL) contains trailing space => 'Artikelnr '. This gives an error with MySQL. This project is about fixing this issue so it automatically corrects it and creates the table. <!DOCTYPE database SYSTEM ""> <database name="dataextractor"> <table name=""> <column name="Artikelnr " type="VARCHAR" size="50"> <platform-column name="mssql2016" type="varchar" size="50"/> </column> Must be future proof so no one time manual fixes. A pastebin log file can be supplied for more info.

    $483 (Avg Bid)
    $483 Oferta promedio
    22 ofertas

    We are seeking an experienced and talented mobile app developer to create a state-of-the-art learning application that transforms the way users engage with complex diagrams, maps, and cycles. The app will incorporate quizzes, progressive learning, and gamification elements to make the learning process enjoyable and efficient. This application will be developed for both iOS and Android platforms. Key features of the app: 1. Engaging quizzes: Users will learn intricate diagrams, maps, and cycles through interactive quizzes that challenge their understanding and knowledge. 2. Progressive learning: The app will employ a step-by-step approach, teaching a few terms at a time and gradually introducing more concepts as users master the material, ensuring optimal retention and preventing overwhelm....

    $13 / hr (Avg Bid)
    $13 / hr Oferta promedio
    24 ofertas

    I want to integrate chat gbt into an existing app

    $168 (Avg Bid)
    $168 Oferta promedio
    29 ofertas

    Android app for harvester farming

    $90 (Avg Bid)
    $90 Oferta promedio
    11 ofertas

    I'm looking for an experienced Technical Content Creator with expertise in the areas of C , C++ , Java & python programing in video format and screen recording. This person should be knowledgeable in these subjects and be able to create effective content to be used across web-based platforms. You must have previous experience creating content, specifically content related to C , C++ , Java & python programming. The content you create must be up-to-date and accurate in order to ensure user satisfaction. If you have experience in the field and are proficient in C , C++ , Java & python programming then please apply for this job. Thanks for your interest!

    $271 (Avg Bid)
    $271 Oferta promedio
    8 ofertas
    Android and Java developer 6 días left
    VERIFICADO

    Need good Android and Java developer.

    $158 (Avg Bid)
    $158 Oferta promedio
    37 ofertas
    Learning for html 6 días left

    Learning HTML basics step by step can be a great way to improve your skills as a freelancer and make your services more valuable to clients. One project that you can work on to practice your HTML skills is creating a short notice for a freelancing website. Here are the steps to create a short notice using HTML: Start with a basic HTML document structure. This includes the DOCTYPE declaration, HTML opening and closing tags, and head and body sections. In the head section, include a title for your short notice. This should be descriptive and give users an idea of what the notice is about. Inside the body section, create a heading for your short notice. This should be larger and more prominent than the rest of the text on the page. Below the heading, include the text of y...

    $21 / hr (Avg Bid)
    $21 / hr Oferta promedio
    8 ofertas

    In this mobile applications, based on Android a platform is basically capture image and video of Digital Micro Imaging Adaptor are widely used in medical clinical examination, teaching, in colleges, universities and scientific researches. To Establish Connection between Microscope and application If the viewer is using the microscope with an Android Application, they may need to begin by installing the Application in the device. Plug the microscope into open USB port on the Mobile Phone. then it will ask for the permission like (allow/deny) applications to access the media in connected device, etc. now the image should be visible on the mobile screen.

    $27 (Avg Bid)
    $27 Oferta promedio
    8 ofertas

    I'm looking for a skilled programmer to convert my existing Eclipse project to VScode, with assistance in debugging any existing code. This project will require expertise in Java programming. For assistance with debugging, I need someone with an aptitude for troubleshooting software issues. This is a time-sensitive project. I need this in the next hour

    $194 (Avg Bid)
    $194 Oferta promedio
    15 ofertas

    Looking for an expert developer to create a platform using Apache Fineract as a middle ground software platform for online lenders and financiers. As an online lender or financier, it is important to have a streamlined process that allows for easy communication and collaboration between different entities. Your role as a developer will be to create a platform that acts as a bridge between a BaaS (Bank as a Service) and online bank loan brokers such as or or . The platform should facilitate smooth communication, data sharing, and transaction management between these parties. The ideal candidate should have experience with Apache Fineract and be familiar with the unique challenges associated with developing a platform for the online lending and financing industry. You should also ha...

    $4337 (Avg Bid)
    $4337 Oferta promedio
    29 ofertas

    I am looking for a web-based chatting application that is coded in Any language and has messaging and voice calling features. I want the application to be secure and have a user database. Required features • A user can send a message to friends, and message can be text, picture, or short video. • A user can receive a message from a friend. • A user can search its chat history (only consider text). • All chat histories are stored in the cloud server. • We do not want the cloud server to learn anything about any chat history. • Ideally, we do not want the cloud server to learn anything about a user, e.g., communication pattern and connections with other users. Deliverables Three items need to be submitted, the source code, the document, and the presentation sl...

    $438 (Avg Bid)
    $438 Oferta promedio
    8 ofertas

    I need a developer that can design Cyclos (Java) system and make a few small changes to some custom code.

    $515 (Avg Bid)
    $515 Oferta promedio
    38 ofertas
    MentalHelp 6 días left

    I am looking for an experienced freelancer to create an innovative mobile app that offers mental health resources. The app is to be designed as a tool to promote awareness of mental health issues worldwide. This project requires the freelancer to have knowledge and experience in developing mobile applications, with special attention paid to user experience and user interface. In addition, the freelancer must be able to provide information regarding past work, as well as detailed project proposals that outline their experience and ideas for the project. Finally, the freelancer will be responsible for producing content for the app, including but not limited to adding mental health questionnaires, sharing capabilities, saving capabilities, and journaling and note-taking features.

    $643 (Avg Bid)
    $643 Oferta promedio
    52 ofertas
    Android Developer -- 2 6 días left
    VERIFICADO

    We need an Android Developer with Java or Kotlin experience. We need a only a freelancer. Develop / Fix the existing issues in the app.

    $18 / hr (Avg Bid)
    $18 / hr Oferta promedio
    44 ofertas

    Generating a synthetic finger print using GAN algorithm provided input images and calculate k-anonimity for the generated images. (PAT GAN)

    $85 (Avg Bid)
    $85 Oferta promedio
    1 ofertas

    Generating a synthetic finger print using GAN algorithm provided input images and calculate k-anonimity for the generated images.

    $103 (Avg Bid)
    $103 Oferta promedio
    2 ofertas
    Android App 6 días left

    I want a Android Developer with good UI/UX skills who can develop my app. App is very basic, its like the developer need to create a quiz based on sates of India. I will share more details once the interested freelancer contacts me. THANK YOU!!

    $439 (Avg Bid)
    $439 Oferta promedio
    33 ofertas
    Gann Wheel of 24 Software 14 horas left
    VERIFICADO

    The idea of the software is to predict the future of any stock markets using gann wheel of 24 with the implementation of the planets movements. 1. :~:text=The%20Wheel%20of%2024%20(also,it%20the%20Wheel%20within%20Wheel. 2. Planetary lines indicator. Full project overview is in the attachments

    $250 - $1300
    Destacado Sellado Acuerdo de Confidencialidad
    $250 - $1300
    4 ofertas
    Android Developer 6 días left

    JD for Android Developer(Augmented reality) Position: Android Developer Experience: 6+ years Notice Period: 15 days or less (Immediate joiners are preferred) Location: Permanent Remote Requirement:- ● Responsible for Troubleshooting the existing system. ● Understanding the problems and should suggest a proper way to solve the problem. ● Must have experience in Firebase of more than 6 years ● Proven experience as a developer or a consultant ● Must have demonstrated experience in Android studio ● Strong ability in using Bit Bucket ● Must have a working project experience in augmented reality

    $12 / hr (Avg Bid)
    $12 / hr Oferta promedio
    17 ofertas

    ABHISHEK HERE FROM INDIA I AM LOOKING FOR LUDO API. ALL INTERESTED MAY CONTACT ME [Removed by Freelancer.com Admin for offsiting - please see Section 13 of our Terms and Conditions]

    $14 / hr (Avg Bid)
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    6 ofertas
    Web page Perfomance Improvments 6 días left
    VERIFICADO

    Web Page Experience Mobile & Desktop Both Remove Unuse Java & CSS LCP Score FID Score CLS Score

    $24 (Avg Bid)
    $24 Oferta promedio
    12 ofertas

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