Hai B.
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Hai B.

Senior developer in ROR/J2EE, E-commerce, SNS, CMS, CRM, SaaS


Hanoi, Vietnam


Dear partners, Thank you very much for choose me to work on your projects. That it help me to get much experience on technical solutions and management. I have built a good team from 2012, ScrumTobe Software (www.scrum2b.com). We have growth up to 10-member team now. From 2015, I focus on activities of the team on outsourcing services in Software Development. And I will not work as freelancer anymore, If you need to get higher quality services on Software Development, please feel free to send me message or invite our team into your jobs. Our UpWork profile at: https://www.upwork.com/companies/~018a573a06d7ae8a23. Thanks ... moreand Best regards, Hai Bui ---- My personal skills/experience: ★ Programming skills: ☆ Ruby on Rails (2.3.x, 3.x, 4.0), ActiveMerchant, Devise, Attached, Memcache, Haml, HtmlDoc, Rspec, Cucumber, Capistrano ☆ J2EE, Struts, Spring, jBoss, Hibernate, JasperReport, Mockup ☆ HTML5/CSS3, jQuery, Bootstrap, BackboneJS, Sencha Touch, Responsive web ☆ Shopify Liquid/Shopify App ★ System Development experience: ☆ Test Drivent Development, Behaviour Driven Development, Selenium IDE ☆ Continuous Integrate (CI), GitHub (branching model) ☆ APIs: Paypal, Stripe, Balanced Payment, Stamps, MailVu, Twilio. etc. ☆ SpreeCommerce, SpreeGateway, Redmine Plugins ☆ Image Magick, Sphinx, Elastic Search engine ★ Server Administration skills: ☆ Nginx, Unicorn, Phusion Passenger, Apache ☆ Tomcat Apache, Spring server, jBoss server ☆ Cloud Application: Heroku, Rackspace, EngineYard ☆ SSH/SSL, DNS ☆ Server: AWS/EC2, CentOS/Ubuntu/FreeBSD, Delicated servers, VPS ☆ MySQL, PostgreSQL, PL/pgsql, MongoDB, Oracle 11g, OLAP I have experience with Scrum/Agile, speak fluently in English. From my experience, I understand how important to write clean codes, easy to read and easy to maintain. less

Hai B. has added 8 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Sep 2013 - Mar 2015

    Rails e-commerce site MVP build

    No feedback given

    538 hours
    $16.67 / hr
    $9,160.15 earned

  • Jul 2014 - Sep 2014

    Shopify store edits and app integration

    No feedback given

    14 hours
    $11.11 / hr
    $151.83 earned

  • Sep 2013 - Jan 2014

    Developer for Shopify

    No feedback given

    $25.00 earned
    Fixed Price

  • Sep 2013 - Oct 2013

    Simple Shopify theme modifications
    Great work again
    $60.00 earned
    Fixed Price

  • Aug 2013

    HTML to Shopify Liquid Conversion
    Professional, Got the project done within the timeframe and had great suggestions on extra things that could be done.
    $260.00 earned
    Fixed Price

  • Aug 2013

    Shopify Theme Guru Needed
    Hai took time to understand the objective, wrote efficient code, and completed the task within a reasonable time. Hai was also a pleasure to work with and responded to all questions within a day. I plan on hiring him again for other work and would recommend him.
    6 hours
    $13.00 / hr
    $71.50 earned

  • View More (5)

Hai B. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
RUBY Programming Skills Test (Hands-on programming skills) 4.65 Top 10% 7 mins
Ruby on Rails 2.3 Test 3.75 Top 30% 25 mins
Ruby on Rails Test v1 (Old) 3.90 Top 30% 28 mins
SQL Test 3.10 Top 20% 36 mins

Work History

100% Job Success
1,599 hours worked
27 jobs


More than 30 hrs/week


Phone Number: Verified

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