Kai Mallea
Staff Software Engineer at Spotify
New York, New York, United States
Summary
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RockstarKai Mallea is a Staff Software Engineer based in New York with 15 years of experience building front-end focused solutions at scale. Currently at Spotify, he blends deep JavaScript expertise with practical product sensibilities to ship reliable client-side features and tooling. Kai has a history of open-source work—authoring and hardening a lightweight isMobile JS library that improved device detection accuracy and added e2e test coverage—demonstrating attention to edge cases and test-driven improvements. He excels at refactoring for performance and maintainability, often tackling subtle bugs in real-world environments. Colleagues describe him as a pragmatic engineer who pairs hands-on coding with mentorship and a steady focus on shipping measurable improvements.
15 years of coding experience
Stackoverflow
9,128reputation
981kreached
84answers
6questions
javascript
top-5%
google-maps
top-5%
delimiter
top-5%
Github Skills (17)
javascript10
regular-expression10
testing9
delimiter9
google-maps9
html6
google-maps-api6
dom6
transition6
css6
jquery6
google-closure-library6
parseint6
image6
typescript-types3
Programming languages (12)
Github contributions (5)
kaimallea/isMobile
Jul 2012 - Nov 2022
A simple JS library that detects mobile devices.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:14 releases, 17 reviews, 222 commits in 10 years 5 months
Contributions summary:Kai primarily contributed to the development of a JavaScript library for mobile device detection. Their work involved writing the initial code, minifying the code, adding support for more devices (iPod and Amazon-specific devices), refactoring regular expressions for efficiency and fixing false detection. They also integrated and tested the library within a test suite. Furthermore, the user contributed to optimizing the code with the addition of e2e tests.
js-librarydevice-detectionbrowsersbrowser-detectionjavascript
spotify/web-scripts
Jun 2019 - Aug 2022
DEPRECATED: A collection of base configs and CLI wrappers used to speed up development @ Spotify.
Contributions:22 releases, 115 reviews, 234 commits in 3 years 2 months
speedconfigsspotifywrappersspotify-api
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