Sergio Saldaña
Desarrollador De Software Sénior at Wikimedia Foundation
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolSergio Saldaña is a senior software developer based in Barcelona with 11 years of experience building web and mobile applications, APIs, and developer tooling. He blends hands-on feature engineering at Wikimedia Foundation—improving newcomer editor experiences and contributing backend fixes to the MediaWiki core—with years of freelance and team-lead work designing Node.js APIs and modern JavaScript frontends (Vue, React, AngularJS). Comfortable across the stack, he has led architecture, CI/CD and code review practices while mentoring junior engineers and accelerating delivery cycles. A lifelong technologist who began coding at university, he also brings practical cross-platform experience from Electron and Cordova apps to Chrome extensions. Notably, his open-source contributions include permission-auditing hooks and Vue 3 i18n integrations for Wikipedia’s platform, reflecting a focus on robust, user-focused engineering.
11 years of coding experience
13 years of employment as a software developer
UPC Universitat Politècnica de Catalunya
Spanish, Catalan, English, French
Stackoverflow
1,893reputation
445kreached
24answers
10questions
amazon-s3
top-5%
Github Skills (17)
mediawiki10
wikipedia10
php10
javascript9
amazon-s39
vue9
vue-jsx9
html8
emulation6
satellite6
s3cmd6
android6
geolocation6
gps6
debugging6
Programming languages (6)
Github contributions (5)
wikimedia/mediawiki
Jun 2022 - Jan 2023
🌻 The collaborative editing software that runs Wikipedia. Mirror from https://gerrit.wikimedia.org/g/mediawiki/core. See https://mediawiki.org/wiki/Developer_access for contributing.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 commits in 7 months
Contributions summary:Sergio contributed to the MediaWiki codebase by implementing several features and improvements. They added a hook for auditing permission errors, enabling more detailed tracking of permission-related issues. The user also made changes related to the Vue.js integration, allowing i18n functionality to be injected into Vue 3 setup functions. Furthermore, the user modified the HTML functionality to allow custom icons in the noticeBox. They also focused on temporary user account expiration notification.
wikimediaphpwikipediacollaborative-editingruns
sgimeno/metricon
Apr 2017 - Jan 2018
Contributions:3 releases, 31 commits, 2 PRs in 9 months
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