Top Upwork Freelancers

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  1. Andrew B.

    Andrew B.

    Data Specialist

    United States - Last active: 22 hours ago - Tests: 4 - Portfolio: 3

    Over the last 8 years, I've been involved in a wide range of research projects performing statistical analyses, database management, technical writing, and business analytics. I'm highly proficient in Microsoft Office suite (with a special focus on Microsoft Excel), SPSS, and SAS statistical software, research writing and editing. My core competency lies in complete end-to-end management of research and data projects, from collecting/analyzing data, to creating high quality and clean graphs, to writing finished technical reports. I am well-versed in both parametric and non-parametric tests. I am seeking opportunities to organize, analyze, and interpret data from all sizes of projects. I also have experience in the following areas: HTML5, CSS3, social media, graphing data, and teaching.

    $40.00 /hr
    235 hours
    4.92
  2. Derek Harrington

    Derek Harrington

    Ruby on Rails Developer

    United States - Last active: 4 days ago - Tests: 2 - Portfolio: 8

    I am a talented and experienced full-stack web application developer. I work almost exclusively in Ruby on Rails. I love developing applications “the Rails way”. I appreciate the brilliance of the Rails architecture and enjoy using it to build world-class applications. I’ve created a number of complex systems using Rails including e-commerce sites, inventory management systems, scheduling systems, forum applications, internal organizational systems, and order fulfillment systems. My rails knowledge is also augmented with intimate knowledge of HTML5, CSS3, Sass, SQL, and jQuery.

    $105.56 /hr
    1,154 hours
    4.86
  3. Vlad Mikhailov

    Vlad Mikhailov

    Ruby/Rails Sotware Engineer

    Russia - Last active: 22 hours ago - Tests: 4

    I am a senior software engineer with over 7 years of experience. I love to work with ruby/rails and whole stuck. I really like to do projects that rely on good API design, complex client/server interaction and provide real value to their customers. My key skills: * Ruby, Rails 3/4, Sinatra/Padrino, Adhearsion, Minitest, Rspec, Capybara * PostgreSQL, MySQL, NoSQL ( MongoDB, Redis, Memcached) * RabbitMQ, Beanstalkd, Sidekiq, Eventmachine * Javascript, Coffescript, HAML/SLIM, HTML5, CSS, SASS * TDD, BDD, Continous Integration (TeamCity), Nant, Rake, Git, SVN, Capybara, Nginx, * DevOps, Chef, Ansible, Docker. * Amazon AWS (EC2, RDS, S3, ELB), Heroku, Engine Yard, Rackspace I also have experience in UX, product and project management (was a head of development with 15 developers and two QA engineers in a my team)

    Groups: Coding Champs, Engine Yard Ruby on Rails Professionals Network

    $50.00 /hr
    2,705 hours
    4.87
  4. Dorin Duminica

    Dorin Duminica

    Software Developer

    Romania - Last active: 22 hours ago - Tests: 12 - Portfolio: 1

    Over the past 6+ years as a Delphi developer I have worked on database, desktop and web applications. I'm proficient in Delphi(version. 7 to 2010) and PostgreSQL. I have a very good analytical thinking and elegant taste for user interface. I also have experience with RTL, VCL(shipped, DevExpress, TMS), OOP, SQL. I'm constantly doing my best to improve my skills and learn new technologies.

    $38.89 /hr
    8,638 hours
    4.90
  5. Ursula Murphy

    Ursula Murphy

    Experienced Researcher and Information Professional

    United States - Last active: 1 day ago - Tests: 3 - Portfolio: 2

    To see more about me, please visit my website: www.ujmservices.com My experience includes: Educational marketing and business research Providing clients with customized research services to help them prove their value to their own target market with authoritative statistics and sources. Researching, analyzing and compiling authoritative, targeted statistics and market research based on identified topics. Writing compelling and organized summaries of findings, outlining key issues of project objectives. Past projects have included 100+ page targeted reports for manufacturing, high-tech, small business, healthcare, and energy industries among others for use in marketing, sales, promotional and educational materials. On a smaller scale, I have also provided topic reports for use in social media marketing, startup business research, sourced and updated information for infographics, and created targeted contact lists. Specialized business database subscriptions held include IBISWorld, Standard & Poor's, Business Monitor, Gale Research, EBSCOHost, Proquest, ABI/INFORM, etc. Writing and Editing Experience writing and editing web content and blogs, copy for infographics, marketing and promotional materials, instructional and training materials, business presentations, business and industry reports, resumes, creative and non-fiction writing, book proposals, resumes, etc.

    $30.00 /hr
    427 hours
    5.00
  6. Muhammad umar B.

    Muhammad umar B.

    Senior Expert Unity3D / Cocos2d /Iphone / Ipad / Android Dev

    Pakistan - Last active: 22 hours ago - Tests: 2 - Portfolio: 11

    I have 4+ years of experience in developing quality mobile games. I have worked on a diverse set of projects ranging from massive social games such as Family Farm to small fun tap games like the Best Dentist Game. I have experience and projects to back that up on various platforms. I have developed games on Cocos2d, Cocos2dX as well as Unity 3D. I have handled teams as well , during the past year i was handling a team of 20 people which included developers , artists and QA people. So i know what it takes to finish projects and do quality work and have a blast doing it !

    Groups: Application Developers Alliance

    $33.33 /hr
    1,046 hours
    5.00
  7. Novita Rahardjo

    Novita Rahardjo

    Graphic / Web Designer

    Indonesia - Last active: 22 hours ago - Tests: 4 - Portfolio: 29

    I am a Graphic Designer based in Surabaya, Indonesia, specializing in User Interface Design and Development. I build clean, appealing, and functional interfaces which comply with the latest web standards. But that's just a part of it. Design is my life. It's something I do before I go to bed, and something I can't wait to do in the mornings. Without it, my world would be black and white. I design with Photoshop, Illustrator, Dreamweaver, and Flash. I code sites with XHTML and CSS, using a little of JavaScript, Actionscript, and PHP.

    $55.56 /hr
    4,705 hours
    4.99
  8. Md. ziaul H.

    Md. ziaul H.

    Sr. Frontend Developer(JavaScript, jQuery, AngularJS, Backbone, HTML5)

    Bangladesh - Last active: 22 hours ago - Tests: 5 - Portfolio: 5

    Currently I am working with a well known web application, where my technologies are OOP based JavaScript, jQuery, AngularJS, BackboneJS with AMD, nodeJS, JSON, SASS/COMPASS, HTML5, CSS3. I am also working with some mobile prototype web app, where my technologies are jquery-mobile, backbone with AMD and nodeJS. These days I would like to work as frontend developer though I have handy skill on backend as well, where I work with some MVC based php framework like CakePHP, ZendFramework with MySQL as relational database and MongoDB as NoSQL. My future interest is to work on Ruby, Ruby-on-Rails and develop some cool app with AngularJS. I have developed a wide range of web application using XHTML, CSS2, jQuery, AJAX, PHP and MySQL for various kind of clients from all over the world. I have very good experience on developing jQuery plugin based on requirements.

    $38.89 /hr
    5,331 hours
    4.99
  9. Ahmed Sayed

    Ahmed Sayed

    Senior Linux Administrator / Virtualization /Asterisk / VoIP / cPanel

    Egypt - Last active: 22 hours ago - Tests: 7 - Portfolio: 1

    I am a senior technical engineer who has 15 years IT experience in the following areas: Advanced Linux Cluster Administration Advanced Proxmox Cluster Administration Asterisk/Trixbox/Elastix/VoIP architect Advanced Knowledge of shell scripting Advanced Knowledge of Perl programming Network Administration Network Security (Penetration Testing) Server Auditing Technical Support Virtualization (mainly Parallels Virtuozzo/openVZ/ProxMox) Web hosting Control panels such as cPanel,Plesk,DirectAdmin Tweaking and Optimizing Apache for better performance Hardening PHP Data recovery

    $44.44 /hr
    6,899 hours
    5.00
  10. Justin M.

    Justin M.

    European Ruby/Rails/JS/LAMP 19 years+ experience based in Asia

    Thailand - Last active: 1 month ago - Tests: 11 - Portfolio: 1

    Prelaunchr Expert - launch like Harrys ! Building web application since 1996 My current preferred stack is RubyOnRails. • Frontend: CSS, Javascript, Bootstrap, AngularJS • Backend: Ruby, Ruby on Rails, Sinatra, Python • Testing: Rspec, rcov, capybara • Full-text search: Elastic Search • Databases: MySQL, PostgreSQL, MongoDB, Redis, Memcached • Amazon infrastructure: S3, EC2, EBS • DevOps stuff: Docker, Capistrano, Ansible, Vagrant. Mina, • Operation systems: Linux, Mac OS X • Version control: git • APIs: geocoding, google services, merchant services, social networks, XML/XSLT, Nokogiri

    Groups: Twilio

    $59.00 /hr
    601 hours
    4.91