John Hamelink, top Hstore developerHire Now
John Hamelink4.9
Freelance Hstore developer in Glasgow, United Kingdom

CTO: Elixir, Ruby, Rails, Android Developer (and scrum master) with 10+ years experience

I've now completed over 130 sessions on Codementor! I'm a consultant developer who's been coding for over 10 years now; 6 of those years professionally. I mainly work in Rails, EmberJS and Elixir these days, but I've built things in languages ranging from C to NodeJS to Go. I've had the opportunity to have large multi-nationals on my client list such as Mozilla, IBM,, and multiple large financial businesses. Outside of Codementor, I'm a CTO at a Startup in Scotland, as well as a consultant adviser for various startups and small businesses in Scotland and the UK.
Rick van Hattem, Hstore software engineerHire Now
Rick van Hattem5.0
Freelance Hstore developer in Rotterdam, Netherlands

Very experienced Python and Postgresql architect with a vast experience in scaling and helping others

Author of Mastering Python (, a book to teach advanced Python programmers everything they need to master the language. No cure, no pay for specific problems. I only accept issues if I'm confident I can fix them in a short amount of time. Always happy to give advice :) Over the last 15 years I've started several companies and according to Stackoverflow I've helped ~3.2 million people using my knowledge. I'm one of the top Python contributors on Stackoverflow and have over 30k points. My main interests are scaling of large infrastructures and websites to millions of users as I did with my last large startup ( I have many years of experience consulting people and companies with varying programming, dba...
Andrew Tian, Hstore freelance programmerHire Now
Andrew Tian5.0
Freelance Hstore developer in Los Angeles, United States

Security Researcher

web developer with 8+ years of experience. worked with high-traffic sites.
Gabriel Odess-Gillett, Hstore coder and developerHire Now
Gabriel Odess-Gillett5.0
Freelance Hstore developer in Austin, United States
Gabriel graduated top of his class from the Electrical Engineering department at UMass Amherst in 2008, and has dedicated his postgraduate career to perfecting his Ruby on Rails skill set. His career started working at successful web design and development firm Fuzz Productions, and more recently worked as the lead engineer founding and launching e-commerce platform
Justin George, top Hstore developerHire Now
Justin George
Freelance Hstore developer in Portland, United States

Software Engineer

I'm a software developer with about nine years of experience in a variety of technologies. I focus strongly on quality workmanship and understanding more than just the software I'm working on to be able to address the real underlying problems, rather than just drop a patch on the surface problem.

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