Michel Weststrate
Michel Weststrate
Open source fanatic, speaker and trainer. Author of MobX, MobX-State-Tree, Immer and a plethora of smaller packages. On a continuous quest to make programming as natural as possible. React, JavaScript and TypeScript fan. Working at Facebook on dev tooling for mobile developers.
React Advanced Conference 2022React Advanced Conference 2022
24 min
A Career As Software Engineer
Typically I talk a lot about deeply technical concepts like TypeScript, type systems, (im)mutability, MobX, Immer etc. But this time it's going to be personal and I'll share lessons, good and bad, about growing as an engineer. I've been leading open source projects, short lived projects as a freelancer and I went through the transition of engineer to tech lead twice. Both at a young startup and at Meta. This talk will be about personal experiences, unpopular opinions and even actions, and anything else that might be counterintuitive. Join for some take-aways for anyone aiming at an engineering focused career. Probably I will be wrong about most things, so don’t miss the opportunity to follow up afterwards!
React Advanced Conference 2021React Advanced Conference 2021
27 min
Beyond Virtual Lists: How to Render 100K Items with 100s of Updates/sec in React
There is generally a good understanding on how to render large (say, 100K items) datasets using virtual lists, …if they remain largely static. But what if new entries are being added or updated at a rate of hundreds per second? And what if the user should be able to filter and sort them freely? How can we stay responsive in such scenarios? In this talk we discuss how Flipper introduced map-reduce inspired FSRW transformations to handle such scenarios gracefully. By applying the techniques introduced in this talk Flipper frame rates increased at least 10-fold and we hope to open-source this approach soon.

React Summit 2020React Summit 2020
32 min
Flipper: The Extensible DevTool Platform for React Native
Are you a React Native developer? Have you always been longing for the rich ecosystem of developer tooling that exists for the web in e.g. Chrome and Firefox? Flipper is Facebooks internal, extensible mobile devtool platform, used the mobile devs that work on the Facebook, WhatsApp, Instagram and many more apps.
Recently the React Native and Flipper team have been working hard to add first class support for React Native as well. This means that monitoring network traffic and performance, using the React Devtools, inspecting device and application logs or even debugging JavaScript can now can now be conveniently done using one coherent tool.
And best of all: Flipper is extensible, so let's build our own plugin while at it!