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José Valim

@plataformatec founder, Open Source developer, Rails Core Team Member, Ruby Hero and creator of Elixir, code available at

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Our stack and technology

  • Ruby
  • Ruby on Rails
  • JavaScript
  • MySQL
  • MongoDB
  • Elixir
  • Erlang

From the Plataformatec blog



Improve your agile estimates using the Ruler Score

The formal definition of estimate is “an approximate judgment or calculation of the value, amount, time or size of something”. In a software development project, estimates are important to help us predict how much time will be necessary in order to finish a set of activities, or to select and pri...

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Bootstrap 3 support for Simple Form

We just released Simple Form 3.1.0.rc1 with support to Bootstrap 3. To make it possible, we leveled up the Wrapper API to make it more extensible and to allow developers to directly configure it instead of relying on global state. After such improvements, it was very easy to change the Simple For...

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Latest Protips from the Plataformatec Team

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