You've landed at the right place. oDesk is now Upwork. Learn about the new platform.

Core Java Jobs

351 were found based on your criteria

show all
show all
only
only
only
show all
only
only
only
only
only
show all
only
only
only

Hourly - Est. Time: More than 6 months, 10-30 hrs/week - Posted
I am looking for a skilled technology lead with good understanding of java and development methodologies and with good mentoring skills to work with us on a niche product. The ask is for this individual to lead a team of 6 java and Sql developers in bringing out a Revenue Cycle management product into the market asap. The skills we are looking out for - Java, Spring Hibernate. (exposure is nice to have) Microsoft SQL Server or MySQL. (exposure is nice to have) Responsive GUI frameworks using json/jquery/bootstrap, HTML5, ajax, Angular JS, javascript. (exposure is nice to have) Pentaho BI or any other BI framework exposure (nice to have) Exposure of cloud computing and infrastructure (nice to have) Soft skills requirement - Very, very good communication skills Able to handle a team of 6 developers Able to draw up fortnightly sprints and track tasks, enhancements and issues. Very good in organizing the team and experience with writing a tech product from scratch up-to...

Hourly - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Are you interested to join a team with a high degree of engineering and automation? Are you an JEE developer with a deep knowledge of WebServices (SOAP) and ideally also knowledge about Polarion ALM and a understanding of a business analyst? Or you can implement xwiki/velocity scripts in Polarion ALM? Please file us your CV and your reference work about Polarion ALM.

Hourly - Est. Time: 1 to 3 months, 30+ hrs/week - Posted
We're looking for an android developer to build out our marketplace product for android versions 4.0+. This android developer will be working with our internal Python API (This is a RESTful API that requires token authentication). We will provide 1. Detailed requirements/documentation to the selected contractor 2. Access to our development API and database (we will approve up to 2 IP addresses for remote DB access) 3. Access to our production API and database upon completion of the prototype/test demonstration 4. API documentation and contact support 5. We will implement any necessary changes to our API upon the developer's request pending review and approval by our internal team 6. Color guide and logos/imagery for branding 7. Wireframes and design concepts -- however we are open to making sacrifices here to meet deadlines and price points We are ideally looking for a contractor to build out this product for us and perform a complete hand off to our team upon completion and...

Hourly - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
Need someone to test and modify an algorithm that matches users with a number of criterias given in requests and client preferences (more details, including diagrams will be given to selected freelancers to provide a quote) Deliverables: - complete JPQL tests, JUnit Test Classes + JUnit Test Suites - code coverage should be at as near to 100% as possible, shown using CodeCover Eclipse PluginTest - Unit white-box test design – covering white document testing criteria, methods and test cases - Unit white-box test report – covering unit white box test results, problems, summary and analysis - Modified algorithm code Skills: Java, JPA/Hibernate (some queries are quite complex), Junit
Skills: Core Java

Hourly - Est. Time: 1 to 3 months, 30+ hrs/week - Posted
Hi, We are looking for a strong java developer having 4+ years of experience. An ideal candidate should have following skills - Strong algorithmic and programming skills - Clarity on core Java concepts - Should be able to solve complex problems - Fast and independent contributor - We are using Play framework(Java) for backend. Someone already aware of it would be plus - Experience in Restful APIs (JSON based) creation Please apply only if you are able to spend more than 30+ hours every week on the project.

Hourly - Est. Time: More than 6 months, Less than 10 hrs/week - Posted
Please check out our website here for an idea of what we have been working on: http://goo.gl/2Uw4jC We are looking for an experience talented coder who has experience with web API's of all kinds including: twitter, facebook, linked-in, shopify, instagram, pinterest, youtube etc. We have many api's we support so wide and specific api knowledge is an asset. You must have knowledge of APIs, their implementation and maintenance, version control, caps and limited and other related API software. You will manage our library of over 20 API's in development and enhance and upgrade, manage, as you expand, enhance, and improve our codebase. You must have knowledge of Java, REST Thanks for your interest
Skills: Core Java

Fixed-Price - Est. Budget: $ 2,000 Posted
Responsibilities include: *Work with product management to design requirements *Envisage, create, build innovative websites & products *Maintain, edit, improve existing websites & products *Other creative duties associated with developing web and mobile applications Qualifications include: *Experience with Java development *Experience with Google Web Toolkit development *Experience with Spring Framework *Certain experience with Responsive web developments and Bootstrap framework usage (JS,CSS, Less) *Experience implementing software solutions that utilize REST and/or Web *Services, JSON and XML support *Experience in architecting (optional) and developing interactive websites and complex web platforms *Java and OO Analysis (optional) and Design experience *Data modeling experience (optional) *Experience using Eclipse and using Atlassian environment: JIRA, Confluence, Bamboo, ... *Experience in Agile methodology *Ability to implement high quality code *Ability to maintain...

Fixed-Price - Est. Budget: $ 100 Posted
We are looking for a Mobile developer to develop an online food ordering application for Android. The app design is simple, we have mobile screen mock ups and API endpoints ready to be consumed for the app. I can share the app design once I get to see your references and we have a chat. You will be responsible for the design, development of the layouts for Mobile app. Your responsibilities: - Review and perform a technical analysis of requirements - Produce a solid, detailed technical design - Write clean, modular, robust code to implement the desired requirements Your qualification: - Experience building Android app which can be demonstrated The app is required to be completed with in 1/2 days, and we have detailed wire-frames already in place, which can be used as a starting point (about 8 screens)

Fixed-Price - Est. Budget: $ 30 Posted
Hello. It is necessary to develop a simple Android-application that will record the а (voice) during a constant pressing certain button on а screen. In addition, necessary an options for viewing/listening/delete records. Complex work with the design of the user interface is not required. More detailed information will be given during the interview.

Fixed-Price - Est. Budget: $ 1,500 Posted
We're looking for a talented developer to build the mobile app version of our website in 5 weeks. We have an API that will connect you to our existing database. The app should also utilise the power of push notifications. UI design mockups/source files in .PSD or .SKETCH format will be provided. On completion of job we'd need you to submit the app to the app store. Project will be funded with release of funds at the end of the project. If all above is fine with you, then please feel free to bid. Website details will be provided when you message us. Thanks for your time.