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Post your Java projects on Upwork and hire expert software engineers and senior Java developers. They can create mobile applications for Android and iOS, redevelop Android widgets, modify and add new Java scripts to your custom Java software, or develop GUI applications with the Swing GUI widget toolkit. The java developers on Upwork are experienced in Java persistence frameworks (like Hibernate), web development, security or database frameworks and Java project lifecycle management tools (like Maven). They can also check, fix or add new Java classes into your Java code, or manage your software debugging, quality control software development or testing tool programming.

Java is a class-based, object-oriented computer programming language that is ideal for cross-platform application development. It comes with a library of commonly used classes and utility functions, called the Java API. On Upwork, the world’s largest online workplace, companies hire experienced Java architects and software engineers to develop all kinds of cross-platform applications, from torrent clients and media players, to helpdesk tools and mobile apps.

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Java Job Cost Overview

Typical total cost of Upwork Java projects based on completed and fixed-price jobs.

Upwork Java Jobs Completed Quarterly

On average, 584 Java projects are completed every quarter on Upwork.

584

Time to Complete Upwork Java Jobs

Time needed to complete a Java project on Upwork.

Average Java Freelancer Feedback Score

Java Upwork freelancers typically receive a client rating of 4.70.

4.70
Last updated: June 1, 2015
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  1. José-Manuel López-Cobo

    José-Manuel López-Cobo

    Technology Specialist

    United Kingdom - Last active: 1 month ago - Tests: 2

    I have been working on the application of Semantic Web technologies to different commercial sectors since 2001, where I was involved in one of the first projects applying that technology in Europe (Daimler-Chrysler in Madrid, Spain). Since then, I’ve been working in the scientific side (See my publications at https://www.researchgate.net/profile/Jose-Manuel_Lopez-Cobo/), the development side (defining and developing products and commercial projects with Semantic Technologies, using the following technologies: Java, J2EE, RDF, OWL, WSMO, OWL-S, UPML, f-Logic) and the management of R&D and commercial projects. I have been involved in J2EE application for several years (more than 8), using technologies and platforms like Spring MVC, Hibernate, JSF, Struts and others. I provide a strong background using version control and continuous integration. With respect to databases, I am proficient with relational databases, like Oracle, Mysql, SQL Server or Postgress and NoSql databases as MongoDB. More recently, I have been involved in playence (http://www.playence.com), as Chief Technical Officer, designing and overseeing the creation of playence Enterprise and playence Express, two enterprise search solutions that take full advantage of the application of Semantic Technologies. In particular, I helped to build a Semantic Search Engine based on Solr, Lucene and a strong NLP platform, using ontologies and Linked Data to annotate and link pieces of information and connecting them with third party information sources.

    $50.00 /hr
    0 hours
    5.00
  2. Ahmed I.

    Ahmed I.

    Computer Engineer/Web Developer

    Egypt - Last active: 10 hours ago - Tests: 10 - Portfolio: 4

    A computer and communication engineering graduate with 6 years of experience in development and programming: • C/C++ (Preferred Language) • C# • Java • PHP, JavaScript, JQuery, CSS, HTML • MySQL • Apache • Wordpress • Data scraping (php-Curl) • Task Automation C# Selenium 2.0 • APIs: Facebook API (php), Youtube API (php), Google Maps API • Bootstrap • LESS (SCSS), CSS sprite • Ajax & Dynamic sites Experiences & Trainings • Received a Microsoft Gold certificate for “2124 Programming with C#” course at New Horizons Computer Learning Centers, 2008. • Attended “Object Oriented Programming in C++” course at the faculty of engineering, Cairo University, 2009. • Participant in ACM programming contest, 2009 • Vodafone internship in summer 2011 • Participant in Oracle’s “Thinkquest International Competition 2011” • Giza Systems - infrastructure internship in summer 2012 • Participant in Code Jam for 2012 • Participant in Facebook Hacker Cup for 2012 & 2013 Projects • Controlling a robot by a smartphone that scouts any closed environment searching for specific object(s) - Application and mobile development using java - Artificial intelligence - Embedded system and hardware programming using Arduino - Image processing using OpenCV library - Circuit design - Mechanical engineering (motors and robotics) • Designed and developed a search engine with complete interface using Java, HTML, and CSS. • Created an automatic university timetable scheduler using C# and MySQL, applying graph coloring and genetic algorithm. • Followed and documented a software development cycle while designing and developing a university website using PHP, MySQL, Javascript, JQuery, CSS and HTML. • Created a chess engine using C++ and applying A* algorithm (with 15 other members). • Developed a program that converts 2D circuit layout to 3D objects using C# and WPF library. • Designed and developed a bank website using PHP, MySQL, Javascript, CSS and HTML. • Designed and developed a 32-bit processor with parallel architecture using VHDL. • Developed a PC to PC chat and messaging program through serial communication using assembly. • Designed and implemented a cooling system using gates, decoders, relays, buffers, etc. for the hardware and C++ for the software. • Created a simple wireless mobile network through server and receiver nodes using Arduino and MIRF library . • Developed a code for an elevator program using object oriented C++. • Developed a simple logic gate software using object oriented C++. • Created a simulation program for scheduling processes in an operating system using C++.

    $10.00 /hr
    0 hours
    4.86
  3. David Smith

    David Smith

    IT Programmer.

    Poland - Last active: 2 days ago - Tests: 3

    Thank you for viewing my profile. I have over 7 years of Windows programming, web programming and iPhone development experience. And I specialized in reverse engineering. I provide creative and detailed programming services in Web and mobile programming. I can take care of all of your needs in areas of reverse engineering, web and mobile programming. Regards.

    $40.00 /hr
    0 hours
    5.00
  4. Liu Yu

    Liu Yu

    Top Notch iOS & Android & PhoneGap & Back-end Developer

    China - Last active: 8 days ago - Tests: 2 - Portfolio: 17

    Experienced software developer with 8+ years of experience developing mobile applications and web products using wide range of programming languages and tools. Expert in development for iPhone/iPad, Android and web back-end. Self-motivated and responsible, always achieves goals that have been set. I have worked on a wide variety of complex projects with long term clients. I am looking for long term cooperation and opportunities to apply my skills and create new applications for you or your business. If you are looking for high quality product I will be available to deliver it. As an excellent mobile application & web developer I will deliver HIGH QUALITY for you. - Right on time I fight deadlines, procrastination and long line to help you get things done on time. The knight of your schedule, the guardian of your time, very noble, you get the idea,,, - I am always available I put your first in line. No waiting. I show you what's progressing, you choose the time and I will be there. 1) The range of development: - Mobile(iOS, Android) Social, dating, chat, business, health & fitness, Instagram, photo sharing, photo editing, Lifecycle, all Hybrid mobile app that interacts with web back-end. - Cross-platform mobile app - Back-end development for mobile app - Web app development 2) Languages Objective-C/Xcode Swift Java HTML5/CSS3 Ionic framework+AngularJS Rest API PhoneGap/Cordova Javascript PHP/MySQL

    $44.44 /hr
    0 hours
    5.00
  5. Asep Muhajir

    Asep Muhajir

    English | Indonesian | VB | VBA Automation | Android | PHP | MySQL

    Indonesia - Last active: 5 days ago - Tests: 12 - Portfolio: 2

    I am a native Indonesian of Sundanese descent. My areas of expertise include the following. 1. Translation of English documents to Indonesian and vice versa. I have 15+ years of translation experience under my belt. 2. Software development (10+ years of experience) With in-depth knowledge of a few programming languages, I have been working on various software projects in specific fields as follows. ♣ Desktop application development: using Borland Delphi 7, Visual Basic and C++ ♣ Mobile application development: Java for Android platform (see my portfolio) and C++ for Symbian ♣ VBA Add-In development (see my portfolio) ♣ Website design and coding: HTML, PHP, and MySQL Having been engaging in the above sorts of jobs, I assure you I can deliver top-notch results in a timely manner. Should you need to have your projects accomplished within a given time frame, feel free to let me know at your earliest convenience. I am available on both Skype and Yahoo Messenger, if you ask me. Thank you so much for taking the time to read this incredibly lengthy overview, which means either you are a serious client or a curious freelancer/contractor. :) Sincerely, Asep

    $5.00 /hr
    10 hours
    5.00
  6. Albert P.

    Albert P.

    Expert iOS/Android Developer with Webservice experience

    Poland - Last active: 1 day ago - Tests: 6 - Portfolio: 8

    Hi, Everyone. I am an expert Mobile App developer as well as Web Backend Developer. I have been working for the past 6+ years developing iOS(iPhone/iPad) apps and Android apps, including programming and graphic design. I love doing quality work and I am so easy to work with. I can get a lot done in a short time and I 'd welcome the chance to complete a high quality project for you. My Skills include as followings; * Social Media/Networking/Sharing App, * Google Map, GPS Location App * MMS, SMS, Push Notification App, * Hotel/Restaurant Booking App, * Barcode/QR Code Scanning App, * Quiz, Running, Endless, Puzzle, Fight Game etc. If you work with me, I make the promise as followings; * Daily or Weekly result. * Responsible communication for more than 10 hours each day. * 100% money back guarantee if not satisfied for any reason. Contact me and then you never regret! Let's do a good business together! Best regards, Albert P.

    $38.89 /hr
    0 hours
    4.95
  7. Uzair Z.

    Uzair Z.

    uzair zafar

    Pakistan - Last active: 1 month ago - Tests: 7 - Portfolio: 1

    Hi! First of all thank you for reviewing my profile. My main objective is to achieve the best quality of work to be delivered to satisfied clients. To provide excellent customer service and aiming for quality administrative work. I'm an internet savvy and computer literate. I am very much enthusiastic in learning new things through whatever job any employer will give me. I am flexible, open-minded and very hardworking. Rest assured that I can submit any tasks that you will give to me ahead of schedule.

    $10.00 /hr
    0 hours
    5.00
  8. Yuri Bushnev

    Yuri Bushnev

    QA Automation and Software Engineer

    Russia - Last active: 1 month ago - Tests: 2 - Portfolio: 3

    Professional skills: - experience developing applications using Java/J2EE technologies - strong experience as an automation QA engineer based on Robot and Selenium frameworks - extensive experience using JSP, Servlets, Spring, Hibernate and Maven - understanding of OOP principles and ability to implement them - extensive experience in using Oracle, Mongo and MySQL db's - experience with Hadoop and Akka framework - experience with Python and Shell scripting - experience with C# programming in perceptual computing - understanding of the design patterns - experience in WEB programming (JavaScript, JQuery, AJAX, CSS, Sass) Knowledge of foreign languages: English – almost conversational ( + confident reading teh.literatury without dictionary) graduated from high school number 11 with extensive English learning Additional information: sociable, diligent, very hard-working.

    $7.78 /hr
    1 hours
    5.00
  9. Stanislav K.

    Stanislav K.

    Android Developer

    Belarus - Last active: 9 days ago - Tests: 1 - Portfolio: 2

    Hi, my name is Stas. I'm responsible Android developer with strong knowledge in application development, testing, performance improving and publishing. I work with Android more than 2 years. I can: - develop application from scratch - fix bugs in exist application and add additional features - add In-App Purchases and Ad Banners - intagrate your application with Facebook/Twitter/Google+/Instagram and any other social media - add cloud services to your project(Parse, Backendless, Google cloud) My main goal here is develop great apps and make my clients happy.

    $8.50 /hr
    4 hours
    5.00
  10. Muhammad Ishtiaq

    Muhammad Ishtiaq

    Android & ios development

    Pakistan - Last active: 4 days ago - Tests: 2 - Portfolio: 10

    I'm a software engineer working in android & ios. Its my ambition to acquire a challenging position in the field of Softwere Engineering reviving the true sense of the Discipline and Manners. I am a person who love to plan meticulously, enabling myself to endeavour for my goals in an efficient manner. This characteristic has been greatly Intensified through my academic studies and life experience. I am confident, that with ardent endeavour I can perform well in the concerning field. I just love to perform challenging work.

    $16.67 /hr
    1 hours
    5.00