Daniel Ferrer
Industry Speaker at BrainStation
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolDaniel Ferrer is a seasoned front-end software engineer with 11 years of experience building polished, accessible user experiences for media and consumer platforms. Currently a Senior Software Engineer at Spotify and an Industry Speaker at BrainStation in New York, he pairs production-grade engineering with public-facing mentorship and teaching. His open-source contributions include notable work on JW Player and HLS.js, where he improved accessibility, caption handling, and playback logic for widely used streaming projects. Daniel has a track record of bridging UX and engineering—from control-bar polish and ARIA enhancements to fixing WebVTT and ID3 parsing edge cases that affect multilingual captions. He mentors engineers through organizations like ADPList and Hack.Diversity, bringing practical product insight to career growth. Colleagues describe him as a pragmatic problem-solver who focuses on subtle UX details that materially improve large-scale media experiences.
11 years of coding experience
8 years of employment as a software developer
Web Development, Web Development at Flatiron SchoolComputer Science / Digital Media & Arts, Computer Science / Digital Media & Arts at Empire State UniversityCertificate, Quality Assurance, Certificate, Quality Assurance at Year Up United
English, Spanish
Github Skills (12)
html10
css10
video-streaming10
javascript10
hlsl10
user-interface10
ecmascript9
user-experience9
accessibility9
ux-design9
mediasource8
react4
Programming languages (3)
Github contributions (5)
jwplayer/jwplayer
Oct 2017 - Oct 2019
No Longer Maintained
Role in this project:
Front-end Developer
Front-end DeveloperContributions:330 commits, 83 PRs, 300 pushes in 1 year 11 months
Contributions summary:Daniel primarily contributed to the front-end of the JW Player repository, focusing on enhancing the user interface and user experience of the media player. Their contributions involved modifying control bar elements, settings menus, and tooltips. The user also worked on adding accessibility features to the player, such as aria labels and keyboard shortcuts, and implementing visual changes to the player such as the drop-shadow effect on the player.
html5-videoandroidmedia-playervideo-playermse
video-dev/hls.js
Oct 2017 - May 2018
HLS.js is a JavaScript library that plays HLS in browsers with support for MSE.
Role in this project:Front-end Developer
Front-end DeveloperContributions:15 commits, 1 PR, 2 comments in 6 months
Contributions summary:Daniel primarily focused on improving the user experience and functionality of the HLS.js library. They addressed caption display issues by modifying the webvtt-parser.js and id3.js files, ensuring proper conversion and rendering of special characters in various languages. The user also made adjustments to level and stream controller logic, fixing potential playback issues and improving code efficiency, and upgraded the library. These changes indicate a focus on refining the core playback and streaming capabilities of the library.
hlsjsjavascripthlshtml5video
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