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Darius Cepulis

Darius Cepulis

DevEx Engineer

Pretends he knows more about coffee than he does. Happier when he's outside. Thinks the web is pretty neat.

Written by Darius:
A diagram depicting a client device interacting with a server via a communication line. A lightning bolt sits in between both the client and server.

August 10, 2023 (about 1 month ago)

Can React Server Actions finally fix forms?

Darius Cepulis
By Darius Cepulis9 min readEngineering

React Server Actions offer a way of simplifying posting data to the server by calling a simple function instead. But do they live up to the promise?

An illustration of a browser window showing different page components highlighted in different colors, depicting that some components are client-rendered while others are server-rendered.

July 19, 2023 (about 2 months ago)

Everything I wish I knew before moving 50,000 lines of code to React Server Components

Darius Cepulis
By Darius Cepulis20 min readEngineering

Here's everything we learned by migrating our production applications to React Server Components — including how to mix Client and Server Components.

A documentation icon and the letters M, U, and X in an isometric grid

January 20, 2023 (8 months ago)

The building blocks of great docs

Darius Cepulis
By Darius Cepulis15 min readEngineering

Great documentation is the backbone of a great API company. How do you scale it and keep a good experience? Learn about information architecture, Next.js 13, React Server Components, and Tailwind.

A browser showing Mux Player loading

November 1, 2022 (11 months ago)

How we made Mux Player’s loading feel great

Darius Cepulis
By Darius Cepulis6 min readEngineering

With lazy-loading and a blurhash placeholder, we make the loading experience of Mux Player feel great in our Next.js app

A mockup of custom Mux water bottles that were designed for CascadiaJS conference.

September 13, 2022 (about 1 year ago)

400 water bottles and a video guestbook at CascadiaJS

Dave Kiss
Dylan Jhaveri
Darius Cepulis
Amin Amos
By Dave and 3 others6 min readEvents

Mux was proud to be a sponsor at CascadiaJS 2022 – here's a recap of our experience in the high desert.

A screenshot of the Mux guestbook project

April 27, 2022 (over 1 year ago)

Leaving an impression in our video guestbook

Dave Kiss
Darius Cepulis
By Dave and Darius10 min readEvents

If you’ve ever attended a conference in person, you know just how taxing they can be. You try to present your best self: unravel the hotel iron from the closet, work that one uncooperative cowlick to ...