Jussi Kalliokoski
Senior Software Engineer at Unity Technologies Finland
Helsinki, Mainland Finland
Summary
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Rockstar🎓
Top SchoolJussi Kalliokoski is a senior software engineer based in Helsinki with 15 years of experience building full-stack web and audio-related systems, currently contributing at Unity Technologies. A lifelong programmer who started at eleven, he combines deep frontend and JavaScript expertise with standards work—he co-designed and co-edited the W3C Web MIDI API and contributes to the W3C Audio Working Group. He favors pragmatic, tool-agnostic engineering, shipping utilities like the modern JS trine library and shaping HTML/IDL specs for MIDI device access. Comfortable working autonomously or in highly motivated teams, he has taken on small leadership roles in both open source and industry settings. Bilingual in Finnish and English, with usable Swedish, he balances technical rigor with clear written and verbal communication—and in his spare time pursues music and hands-on tinkering that feed back into his audio/web work.
15 years of coding experience
11 years of employment as a software developer
Student, Physics, Mathematics, Music, Student, Physics, Mathematics, Music at Alppila High SchoolElementary, Elementary at Askolan peruskoulu
English, Finnish, Swedish
Stackoverflow
814reputation
45kreached
25answers
1question
Github Skills (16)
unit-testing10
javascript10
web-standards10
w3c10
api-design10
idl9
html9
functional-programming9
babeljs6
git6
gulp6
bugzilla6
backbonejs6
webpack6
minify6
Programming languages (13)
Github contributions (5)
jussi-kalliokoski/trine
Jun 2015 - Oct 2016
A utility library for modern JavaScript.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:125 commits, 42 PRs, 102 pushes in 1 year 4 months
Contributions summary:Jussi primarily focused on implementing a utility library for modern JavaScript. They added, modified, and implemented various iterable methods, including `aggregate`, `convolve`, `count`, `difference`, `drop`, `dropWhile`, `find`, `first`, `fork`, `head`, `intersection`, `last`, `map`, `quickSort`, `reduce`, `reverse`, `sort`, `sortAlphabetically`, `sortAlphabeticallyBy`, `sortBy`, `tail`, `take`, `takeWhile`, `to`, and `uniq`. Additionally, the user added the boolean and function utility methods.
lodashjavascriptgeneratorsmodern-javascripttypescript
WebAudio/web-audio-api
May 2012 - Dec 2012
The Web Audio API v1.0, developed by the W3C Audio WG
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:22 commits, 2 comments in 6 months
Contributions summary:Jussi focused on developing the Web MIDI API specification. Their work involved defining and implementing the core interfaces for MIDI access, including MIDIAccess, MIDIPort (MIDIDevice), MIDIInput, MIDIOutput, and MIDIMessage. They also specified the behavior of these interfaces, including event handling and interaction with MIDI devices, and implemented the permission model. The user's contributions included code modifications in HTML and IDL.
apiv1-0javascriptaudio-apiaudio
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