Rich Harris, creator of Svelte, worked at the Guardian. Svelte has been adopted at NYT however [0].
You might be thinking of Mike Bostock, the creator of D3.js and ObservableHQ.com, who led data visualization work at NYT for several years [1]. I'm not sure if they have people of that magnitude working for them now.
Rich did work at the NYT. I thought there was some Mandela effect going on for a second, because you misled me into believing you had actually googled it by providing sources.
Yeah, my bad. I shouldn't have relied solely on the Wikipedia article and my (sketchy) memory. Rich Harris is still listed as a graphics editor on the investigative team at NYT: https://www.nytimes.com/by/rich-harris
Might want to update the Wiki article on Svelte, which strongly implies Rich worked at The Guardian, not NYT. The only source I could quickly find that seems to corroborate what you're saying is a LinkedIn page, but because of its bullshit paywall, there's context missing.
You might be thinking of Mike Bostock, the creator of D3.js and ObservableHQ.com, who led data visualization work at NYT for several years [1]. I'm not sure if they have people of that magnitude working for them now.
[0] https://en.wikipedia.org/wiki/Svelte
[1] https://en.wikipedia.org/wiki/Mike_Bostock