Demian Ferreiro
Senior Frontend Developer at Navgar, Inc.
San Carlos de Bariloche, Río Negro Province, Argentina
Summary
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Rockstar🎓
Top SchoolDemian Ferreiro is a Senior Frontend Developer with 15 years of experience building web applications from startups to distributed teams, currently based in San Carlos de Bariloche, Argentina. He combines deep frontend expertise in React, TypeScript and live-update architectures with practical backend experience in Ruby and GraphQL, having modernized user-facing apps and led search and API initiatives. A seasoned remote engineer, he contributed to high-impact projects at Toptal and has hands-on startup experience founding a tourism booking platform. His open-source work touches notable repos like CoffeeScript and RubyMoney, where he improved compiler robustness and usability of money handling APIs—signals of a developer who values developer experience and maintainable core libraries. He pairs pragmatic engineering judgment (e.g., recognizing when complexity outweighs value) with a history of mentoring, interviewing, and cross-functional collaboration.
14 years of coding experience
13 years of employment as a software developer
Master's degree Computer Software Engineering, Master's degree Computer Software Engineering at University of Buenos Aires
English, Spanish
Stackoverflow
19,019reputation
1.1mreached
199answers
9questions
closures
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sinatra
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sorting
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dictionary
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java
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oop
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Github Skills (31)
coffeescript10
groovy10
testing10
monetary10
ruby10
compiler-design10
javascript9
oop9
json9
refactor9
java9
grails9
android-fragments9
variadic-functions9
backbonejs9
Programming languages (11)
Github contributions (5)
RubyMoney/money
Feb 2015 - Jun 2016
A Ruby Library for dealing with money and currency conversion.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 4 PRs, 1 branch in 1 year 4 months
Contributions summary:Demian focused on improving documentation examples and enhancing the core functionality of the Ruby money library. They updated the documentation to reflect proper usage of `Money.new` and `Money#inspect`. The user also added a new class method, `Money.from_amount`, which provides a more convenient method for initializing a `Money` object from a numeric value. They also refactored the testing structure.
currency-conversioncurrency-converterrubycurrencycurrency-exchange-rates
jashkenas/coffeescript
Oct 2012 - Feb 2014
Unfancy JavaScript
Role in this project:Back-end Developer
Back-end DeveloperContributions:49 commits, 46 comments in 1 year 3 months
Contributions summary:Demian primarily focused on improving the CoffeeScript compiler. Their work involved refactoring the code base by removing unnecessary code, preventing constructor issues and making the error messages more explicit. They addressed specific issues related to constructors and parameter handling and enhanced the overall error reporting for a better developer experience. These commits indicate efforts to improve the core functionality and reliability of the CoffeeScript compiler itself.
javascript
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