Core Java Developers & Programmers

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Core Java Job Cost Overview

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

Upwork Core Java Jobs Completed Quarterly

On average, 407 Core Java projects are completed every quarter on Upwork.

407

Time to Complete Upwork Core Java Jobs

Time needed to complete a Core Java project on Upwork.

Average Core Java Freelancer Feedback Score

Core Java Upwork freelancers typically receive a client rating of 4.68.

4.68
Last updated: May 1, 2015

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  1. Artem Bogush

    Artem Bogush Agency Contractor

    Android/iOS Reliable Products Development

    United Kingdom - Last active: 1 day ago - Tests: 4 - Portfolio: 13

    oDesk VERIFIED --oDesk has recognized me as one of their top Mobile Developers. I'm glad to have an opportunity to provide my best to help people come their ideas to live with committing all the experience I have in technical and communicative aspects. Contact me If you are looking for a reliable developer who will care about your project as his own and for someone who knows how to implement your idea in a stable and scalable way. I'm open to discuss the details so you can decide if I'm really the right person you've been looking for. I'm passionate code architect. I'm doing programming for more than 6 years. Deep and versatile experience in Java language as well as Android development in which I'm enthusiastic expert for already more than 4 years. My another passion is Objective-C and iOS development where I've build a number of successful applications as well. Сreating stable, structured, and maintainable products for clients. This is what is crucial for project's evolving on technical level which I'm responsible for. It is very important paradigm which should be followed during all the development lifecycle. I think code quality must be on a priority list while delivering products to customers. This basic and simple idea always helps to focus on the main work achieving goals in a shorter terms which in the end helps to save customer's time and budget. I'm always trying to build an open business relationship at the very beginning of cooperation as it helps to create a stable contact and efficient partnership which in the end leads to better understanding of customer's needs and requirements allowing to achieve high performance. A brief list of skills and technologies covered: 1. Android app development 2. Java programming 3. iOS (iPad, iPhone) app development 4. Objective C programming 5. Wearables 6. Parse 7. Advanced asynchronous flows covering/multi-threading 8. Complex custom control building. 9. Complex home screen widgets developing. 10. SQLite database managing/data persisting 11. OpenGL-ES programming with shader language (HLSL) 12. Http, XMPP, json 13. Push notifications 14. Interprocess communications (IPC) 15. Work with wide range of device's modules/sensors (GPS, gyroscope, etc.) 16. Social networks integration 17. Google maps integration 18. Advanced experience in supporting of wide range of different device types - tblets/phones with all possible resolutions and screen configurations 19. Supporting application localizations 20. Security tools 21. NDK development

    Groups: Application Developers Alliance

    Associated with: php-professional

    $45.00 /hr
    895 hours
    5.00
  2. Alexey B.

    Alexey B. Agency Contractor

    Senior Java Developer / Team lead: Java/J2EE

    Ukraine - Last active: 16 hours ago - Tests: 2 - Portfolio: 6

    IT-Specialist with more then 15 years experience in software development. Over last 12 years I was working on web sites/portals development using Java and related techs: JSF, Facelets, RichFaces, Spring, Seam, JPA, Hibernate, EJB, Portlets, Maven, HTML, DHTML, CSS, JavaScript. JBoss AS, JBoss Portal, Tomcat, AMF, BlazeDS, SOAP, JSON, XML. Over last 7 years worked as team lead/architect. Last 3 years spent as project manager for eCommerce platform server-side/portal development. Hardworking, team and goal oriented, challenge seeking, work well under pressure. Ready for sporadic overtime.

    Groups: Yahoo Web Hosting Designer

    Associated with: U268

    $33.33 /hr
    15,552 hours
    4.86
  3. Sara S.

    Sara S. Agency Contractor

    United States - Last active: 14 days ago - Tests: 2 - Portfolio: 8

    The revelbliss team has come together from a desire to produce quality products. We are a team of hand picked individuals who have all excelled in our own careers but have decided not to take the corporate route and actually dedicate a little more attention to our customers and our products. Yes, we are a just another startup made up of brilliant minds, that individually have the track record to prove it. At revelbliss, our main goal is to take the process of app creation and make it straightfoward, concise and keep you involved every step of the way. We are here to create your brain child, and we vow to keep the integrity of your idea intact from the whiteboard to app store. Here is a closer look at the journey that will turn your brilliant idea into a reality.

    Associated with: RevelBliss, LLC

    $55.56 /hr
    665 hours
    4.94
  4. Monickavasakan N.

    Monickavasakan N.

    providing solutions in Higher education, elearning market

    India - Last active: 3 months ago - Tests: 2 - Portfolio: 4

    I have experience in providing solutions in Higher education market. I have experience in developing and supporting MOOC systems for multiple customers and also provide customization for Canvas LMS, BigBlueButton open conference system and Kaltura open video platforms. I am currently working on Kuali rice and Kuali Student platforms and developing REST API based integration between Kuali Student Curriculum management system and Canvas LMS system to manage courses, program and Learning outscomes, etc. I am looking to for works related to education market, projects related to Alfresco documentation management system, Workflow Development using Activiti, Canvas LMS, BigBlueButton open conference system and Kaltura open video platforms, etc.

    $33.33 /hr
    63 hours
    4.61
  5. Saravanan Mugund

    Saravanan Mugund

    Software Development Manager / Architect / Technical Manager

    India - Last active: 03/21/2014 - Tests: 8 - Portfolio: 7

    Proven track record of strong leadership and successful management of complex and difficult engineering programs. Consistently completed projects / programs on or before schedule, within the budget with desired result. 16+ year of unique blend of experience in both product and application development environments. Successfully contributed in solution architect, system architect, design for many products and applications. Well received people manager for large engineering and development teams. Strengths include leadership, high technical ability, multi-tasking, very quick learning ability, business acumen, troubleshooting and innovative solution providing.

    $33.33 /hr
    1,318 hours
    5.00
  6. Fernando R.

    Fernando R.

    Ruby on Rails Developer with Strong Linux Background

    United States - Last active: 07/03/2012 - Tests: 3 - Portfolio: 1

    Very proficient RoR Web developer with a strong Linux/Unix background. Located in Florida, USA I work on EST timezone, allowed to work legally in the USA, I can attend to meetings, receive and make calls worldwide, as my customer you will be provided with a direct line to contact me if necessary. Over 11 years of experience on the IT industry, mainly working for major 500 Fortune US companies such as Cisco Systems, LexisNexis, Sun microsystems and others. My focus is always to keep things as simple as possible and make stuff better. Relevant skills : - Ruby on Rails 3 - Authorize.net , Credit card systems - RSpec , Capybara ( Testing ) TDD - Memcache - C ANSI - Linux / Unix (Solaris) - Shell scripting - Unix power tools: vi,awk,sed,bash,truss,top,strace,tcpdump,iptables.. - Capistrano - Amazon EC2 and Clouding computing. - VPS (Heroku, SliceHost, DreamHost) - Git Collaboration tools and extras that we offer to our customers : - US Phone number landline and cell phone - Skype. - Outlook Calendar (Exchange server) - EST U.S timezone, Located in Florida, near by major airport (FLL) - Fluent in English, Spanish and Portuguese (Spoken and Written) Don't hesitate to contact me if you have any questions.

    $33.33 /hr
    157 hours
    5.00
  7. Rudi Grinberg

    Rudi Grinberg

    Software Developer

    Canada - Last active: 3 months ago - Tests: 5

    Hello, I'm a passionate software developer specializing in functional programming in OCaml, Haskell, Erlang and the scripting languages Perl, Python, Ruby, and JavaScript. I always stay up to date the latest methodologies and best practices and deliver code quality of the highest class. I've been programming for a long time as a hobby (10+ years) and more recently (3+ years), as a professional. I am confident that I can complete any task that is thrown at me and I guarantee satisfaction with any code that I write. If you care about the maintainability and extensibility of your project then I am a great candidate for your project. Check out my github profile to see what I'm working on in my spare time: https://github.com/rgrinberg I've recently started a tech blog at http://rgrinberg.com Any comments or feedback is most welcome!

    $59.99 /hr
    891 hours
    4.98
  8. Anton Kuzmin

    Anton Kuzmin

    Senior ruby/java web developer

    Estonia - Last active: 16 hours ago - Tests: 7

    Full stack senior web developer with aim at quality of the product, good performance and maintainable source code. 8 years of experience. Able to work remotely, self-motivated. Only heard positive feedback in that sense. Favorite programming books: - The passionate programmer - SQL performance explained

    $40.00 /hr
    40 hours
    5.00