Matjaž Horvat
Staff Software Engineer at Mozilla Corporation
Slovenia
Summary
🤩
Rockstar🎓
Top SchoolMatjaž Horvat is a Staff Software Engineer with over a decade of experience building localization-first web products and tooling, best known for founding Mozilla’s Pontoon localization platform. He combines product and UX design sensibilities with hands-on front-end and Python/Django development to centralize localization workflows and reduce duplicated effort across large projects. Beyond Pontoon, his open-source contributions span Mozilla projects like Common Voice and Firefox Send, where he focused on internationalization and broadening language support for global users. A long-time community builder and founder of Mozilla Slovenija, he also brings experience in virtual power plant UX, journalism, and public-facing tech education. Colleagues describe him as someone who blends technical depth with practical product ownership and a knack for turning community needs into durable engineering solutions.
11 years of coding experience
8 years of employment as a software developer
M.Sc., Computer and Information Science, M.Sc., Computer and Information Science at Univerza v LjubljaniGymnasium, Secondary/Grammar School, Gymnasium, Secondary/Grammar School at Diocesan Classical Gymnasium
Github Skills (17)
monitor10
translation10
fluentkit10
internationalization10
localization10
firefox10
fluentui10
fluentd10
translate9
gateway9
translators9
translator9
css7
html7
screen-shot5
Programming languages (7)
Github contributions (5)
mozilla-services/screenshots
Mar 2017 - Jul 2019
Firefox Screenshots: the best way to take screenshots on the web.
Role in this project:
Localization / Internationalization Specialist
Localization / Internationalization SpecialistContributions:379 commits, 4604 pushes in 2 years 3 months
Contributions summary:Matjaž's contributions primarily involve updating and maintaining language localizations for Firefox Screenshots. They've updated translations across numerous languages, including Japanese, Slovenian, Sorbian, Arabic, and many others, by modifying the server.ftl files. The changes consistently reflect Pontoon-related updates, indicating the use of a translation platform and a focus on ensuring the application's availability in diverse languages. This work significantly broadens the app's accessibility and usability for a global audience.
firefoxscreenshotwebextensionscreenshotsfirefox-webextension
common-voice/common-voice
Mar 2018 - Jan 2023
Common Voice is part of Mozilla's initiative to help teach machines how real people speak.
Role in this project:Front-end Developer
Front-end DeveloperContributions:62 commits, 35382 pushes in 4 years 10 months
Contributions summary:Matjaž's commits in the common-voice repository appear to be primarily focused on the localization efforts, with the largest part dedicated to the translation of strings. These changes were related to the modification of front-end components within the project. Based on the change logs, the user updated the translation for multiple locales, like Gurgula (ggg), Dhatki (mki), and Oadki (odk).
internet-freedommachinesinitiativeopen-datavoice
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.