Màxim Colls
Software Developer at Self-employed
Valencia, Valencian Community, Spain
Summary
🤩
Rockstar🎓
Top SchoolMàxim Colls is a versatile full-stack software developer with 14 years of experience building web products, primarily with Ruby on Rails and modern JavaScript (Node, React, React Native). He blends hands-on engineering with product and team leadership—having served as developer, team lead, and product manager—and has helped hire and mentor engineers across remote teams. For the past three years he’s worked as a freelance developer, joining startups to build features, improve processes, and scale small teams while contributing to notable open-source projects like Open Food Network and Decidim. His background in research and applied math (including an Erasmus in mathematics and a master in meteorology) informs a pragmatic, data-aware approach to problem solving that surfaces in localization, UX fixes, and full-stack integrations. Based in Valencia, he favors impact-driven projects that connect technical quality with real-world community or product outcomes.
14 years of coding experience
14 years of employment as a software developer
Erasmus Exchange, Mathematics and Statistics, Erasmus Exchange, Mathematics and Statistics at Ecole normale supérieure de LyonUPC Universitat Politècnica de CatalunyaMaster, Meteorology, Master, Meteorology at Universitat de Barcelona
Catalan, Spanish, English, French, Portuguese
Github Skills (12)
ruby10
ruby-rails10
localization10
rails10
backend9
back-end-development9
javascript8
ruby-on-rails8
coffeescript8
front-end-development7
fody4
par4
Programming languages (7)
Github contributions (5)
decidim/decidim
Nov 2017 - Nov 2020
The participatory democracy framework. A generator and multiple gems made with Ruby on Rails
Role in this project:
Localization / Internationalization Specialist
Localization / Internationalization SpecialistContributions:66 reviews, 9 commits, 35 PRs in 3 years
Contributions summary:Màxim primarily contributed to the localization of the application. They added Portuguese translations for select2, foundation-datepicker, and fixed an aria-label attribute. The user updated and extended the Portuguese locale for foundation-datepicker, including format options. These changes show the user focused on making the application accessible and usable for Portuguese speakers.
ruby-on-railsdecidimdemocracygovernmentcivic-tech
openfoodfoundation/openfoodnetwork
Nov 2017 - Nov 2018
Connect suppliers, distributors and consumers to trade local produce.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:7 commits, 7 PRs, 23 comments in 1 year
Contributions summary:Màxim's contributions focused on improving the user experience and fixing bugs within the Open Food Network project. They addressed issues related to state abbreviation handling, updated checkout page UX, and fixed test specifications. Code changes span front-end (JavaScript/CoffeeScript) and back-end (Ruby on Rails) components, indicating a full-stack development role. The updates improved the user interface and fixed integration issues.
farmersdistributorsrailsnonprofitfood
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