Top Upwork Freelancers

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  1. Victor Vlasenko

    Victor Vlasenko Agency Contractor

    Founder and Senior Developer at SysGears

    Ukraine - Last active: 1 day ago - Tests: 4

    A senior developer with over 12 years of experience, focused on creating complex Java/Scala solutions. Especially efficient at software optimization and implementation of high performance computing systems. Fully dedicated to product quality, beauty of architecture and performance of the code. Technical Proficiencies: - Languages: Java, Scala, Groovy, JavaScript - Web Frameworks: Grails, Play 2, AngularJS - Frameworks: Akka, Spray, ZooKeeper - Databases: MongoDB, MySQL, H2

    Associated with: SysGears

    $30.00 /hr
    1,615 hours
    4.92
  2. Ramesh V.

    Ramesh V. Agency Contractor

    Expert Java J2EE Developer

    India - Last active: 11 hours ago - Tests: 3

    I am an expert Java J2EE developer with 9 years of coding experience I provide outsourced services for Java, J2EE and Angular JS. I can handle a project from requirement gathering, analysis, design, coding (both backend and frontend), Junit Test cases and automation tests. Project Experiences: Yayo is an eCommerce platform stitched specifically for the needs of Film Production Companies. I have designed and developed API's for both mobile and Partners, built a portal for Production Company Managers. Involved in the development of a project Moose, which uses GWT and Sencha GXT. Also implemented Full Text Search in GAE by providing an objectify kind of framework. Designed and developed Sentinel project, which provides Guest Access Portal. Used Free Radius and Jradius modules to authenticate dynamically generated Guests. Sentinel has 3 modules, Admin Portal, Sponsor Portal and Guest Portal. Paladin MultiOS is a Wireless security deployment platform and device tracking/management platform. It provides a reliable and affordable solution for deploying and monitoring secure networks in the age of BYOD. This is deployed on Amazon EC2 linux with tomcat as web server. Eostis is one of the leading classifieds website in France. I have worked to move eostis from the old legacy system to Google App Engine and made it survive from the maintenance issues and frequent server deeds. Involved in the development of several live online projects like http://www.theflowerexpert.com , http://www.pickupflowers.com , http://www.giftsnideas.com and http://www.flowersforcelebrations.com. Migration of a legacy ehealth tool to web application (Central Configurator) by using Spring, Hibernate, Web Services and Ibatis. Migration of a command line tool to GWT + EXT GWT web application. Provided a Command Line Interface for a web application by using Web Services. Google App Engine Projects: Converting SAP reports from email attachments to google spreadsheets. Developed a GAE + Vaadin application for a sales company to maintain there whole inventory.

    Associated with: Soft Suave

    $33.33 /hr
    3,845 hours
    5.00
  3. David Codesido

    David Codesido Agency Contractor

    Linux Systems Administrator

    Spain - Last active: 1 day ago - Tests: 3

    Over more than 15 years I've been a GNU/Linux fanatic while I was studying my Computing Science Engineering career. After that I have worked for 8 years as a Systems administrator and DevOps for an IPTV company. During these years I've mastered on server side administration oriented to web services and web backends (Tomcat, Nginx, Apache, Postgresql, MySQL) and with Cloud oriented services (CDNs, High Availability, Clustering). As part of my job I also have knowledge of a whole set of tools on GNU/Linux for debugging networking and OS issues and both Bash and Python good programming and scripting skills. As a result of my career tesis and years on IPTV, I have a deep understanding on video technologies, transcoding and streaming. As a DevOps I have a good understanding on software design and testing, customer relationships and project managing which gives me a new angle on approaching projects on time phocusing on customer satisfaction and Quality Assurance.

    Associated with: Treitos

    $33.33 /hr
    179 hours
    5.00
  4. Roman Yerin

    Roman Yerin Agency Contractor

    Web and VoIP(FreeSWITCH, WebRTC) engineer

    Russia - Last active: 1 day ago - Tests: 4 - Portfolio: 2

    I'm a skilled software developer and VoIP engineer with more than 15 years of experience. I'm also a full-stack developer of the convergent systems of voip and web. Playing with Freeswitch, Kazoo, SipXecs, Ruby, Perl, JS(node.js), C/C++ and much, much more - I'm always choosing tools for the task. Probably the most important thing which differs me from others - I'm never working just to gain money. I'm always doing my best to reach your goal the fastest way possible. If you've chosen a non-optimal solution I'll correct it and suggest a more efficient way. I'm never promising something that you're probably expecting to hear instead of the realistic estimate of your project. I'm never lying to my clients and I'm always giving all the information I have - transparently and on a regular basis. In one word - you can trust me as you trust yourself.

    Associated with: Coderunes

    $45.00 /hr
    540 hours
    4.82
  5. Alex Momotyuk

    Alex Momotyuk Agency Contractor

    Senior Android Developer

    Belarus - Last active: 11 hours ago - Tests: 1 - Portfolio: 2

    I am an android mobile developer with 3+ years' experience. Last time I focused on developing full stack mobile projects for Android. I have a wide range of experiences in software development using Java, C++. I am able to provide full life cycle of software engineering right from requirements gathering, design (if needed), prototype, development, testing, publishing and maintenance. I am an highly effective and reliable person able to meet the job requirements and agreed deadlines. In mid and long-term projects I like to follow TDD, version control, code reviews and other good agile practices to provide excellent results in time and build continuous and productive communication.

    Associated with: Panda Systems

    $25.00 /hr
    503 hours
    5.00
  6. Angeloluca B.

    Angeloluca B. Agency Contractor

    Google Apps Script / Node.js / Javascript Development

    Italy - Last active: 1 day ago - Tests: 3 - Portfolio: 6

    I like to understand, question and solve problems. I especially focus on building integration and automation tools, whatever can help people and systems to collaborate and behave smartly. I especially focus on Javascript, Node.js, Google Apps Script flexibility and Google App Engine powerful capabilities, but Python and Java are good friends too. I have developed a wide range of dashboard, automation and mining tools for startup companies and businesses exploiting the smartness and power of these tools. I built an extensive experience in data mining, recovery and automated analysis for business intelligence and bioinformatics. (2 years) - Cloud Development & Web Collaboration : Google Apps Script , Javascript, Node.js, Google Clous Products - Software Development : C/C++, JAVA, C#, PHP - Data Mining : Excel, Extraction & Recovery,Database MySQL/Oracle PHP/PERL/Python for scripting and Web Applications(3 years) JAVA/C# enterprise development for Web Services, SOA and Integration (4 year of practice) C++ distributed and network software development (3 year of practice) C++ network management development (2 year of practice) C++ system programming and low-level coding (2 year of practice)

    Groups: Crossrider

    Associated with: Web HQ

    $44.44 /hr
    679 hours
    4.98
  7. Andrey Chorniy

    Andrey Chorniy Agency Contractor

    Senior Java (JEE and Android) Developer

    Ukraine - Last active: 3 days ago - Tests: 3 - Portfolio: 7

    During my 11 years experience I've worked with a lot of java technologies and frameworks, performed a lot of refactorings and system re-deisgns and application performance tuning. My latest experience include application development for Android platform and web-applications with Java/Jboss-Seam/JSF/Hibernate/Spring. System integration with CMS systems like Alfresco, Artesia (OpenText) I have strong background in application performance tuning. Follow the best OOP principles and Design-Patterns. I also have an experience in developing information retrieval systems, datamining, textmining, evolutionary/genetic algorithms. I'm looking for challenging Java/JEE/Android projects.

    Groups: Android, Sun Certified Professionals

    Associated with: Texus

    $30.00 /hr
    2,876 hours
    4.83
  8. Muhammad W.

    Muhammad W. Agency Contractor

    PHP/Mysql Programmer

    Pakistan - Last active: 1 day ago - Tests: 4 - Portfolio: 1

    Dedicated, dynamic web developer experience in developing websites .Detail oriented, delivers results for employers.Eeager to learn new technologies. Hi,I am Muhammad Waqas.I have a good working knowledge and experience in MySQL, PHP, Javascript, XHTML, XML,ajax.I have also worked on php framworks like Codeiginiter,YII Framework.I have also work in .Net and Java.

    Associated with: Hameed&Majeed Soft (H&M)

    $12.22 /hr
    209 hours
    5.00
  9. Pavlo H.

    Pavlo H. Agency Contractor

    Professional .NET developer ASP.NET, MVC, EF, SQL, JS

    Ukraine - Last active: 1 day ago - Tests: 3

    Specialist in the field of IT technologies with 8+ years experience. A Software Developer with over 5 yrs commercial experience in the web/internet area primarily with ASP.NET and SQL Server. 3 yrs - DeskTop application. Within this area has successfully completed a number of different commercial projects. As a result of working on a variety of projects both within a team and individually using emerging technologies such as .NET 2.0/3.5/4.0/4.5 has the necessary skills and experience to work in areas of web/internet development. • Good insight into design patterns and designing applications using an OOPS • Experience of developing business applications using in C#/VB, . Net ramework, ASP.NET, ASP.NET MVC, Web Api, WPF, WCF, ADO.NET, LINQ, EF, AJAX, JavaScripts • Experienced working with Git, Perforce SVN, TFS • SQL programming experience, wrote back-end Procedures, Functions, Triggers and query optimization techniques • Experience in implementing reporting using Crystal and Microsoft Reports • Experience integrating open source tools and libraries in the .NET application project • Experience in front-end level: AngularJs, jQuery

    Associated with: SmartApes

    $30.00 /hr
    1,460 hours
    5.00
  10. Vinay K.

    Vinay K. Agency Contractor

    Experienced Mobile Developer(Exp+6 years)Objective-C/Swift/Android

    India - Last active: 2 days ago - Tests: 2 - Portfolio: 10

    Hi, I am an iOS developer with 6+ years in IT industry. From more than four years, I am working on XCode and Objective-C. My primary skill set includes development on the iPhone/iPod Touch, iPad,Android applications. I am skilled in Core Graphics,Core Animations SQLite, JSON/XML parsing, MapKit, FB connect, Twitter, Web Services, Push Notifications etc and many more.I am well furnished with every aspect of iOS Development I have completed many projects which highly includes the core animations and core graphics. I have worked on more than 30 iPhone/iPad Applications/Android. In which most of them are currently successfully running on App Store. I Love my work and Clients,my main objective is to provide quality work to my clients and satisfy them, So as to maintain a long time relationship with them. Thanks a lot for your attention. -Vinay Kumar

    Groups: Application Developers Alliance

    Associated with: WebTech Bridge

    $17.78 /hr
    444 hours
    4.91