• James Sinclair is a great writer in general. His articles on functional programming are some of the most accessible I've read on the topic.
• Mark Seemann writes about software architecture, DI, functional programming, among other topics. His code examples are written C# and F#, but they can be easily understood if you just know JavaScript.
• Kent C. Dodds is pretty famous in the frontend JavaScript space. He has great articles on ReactJS, NodeJS and software architecture in general. He's also the main person behind React Testing Library.
• Josh W. Comeau writes excellent articles, many of them interactive, about ReactJS, CSS and frontend development in general.
• Fabien Sanglard writes about Linux, the history, source code and hardware of Video Games... and just general stuff related to computers. It's hard to place his articles in a single category, but they are pretty awesome.
• Dan Abramov's Overreacted has some cool articles on ReactJS.
• Kent Beck's Tidy First focuses more on the human-side of IT.