I'm Tejas Kumar,

and I've been building on the web for over 20 years at places like

and more.

I host a podcast.

Where I talk to world experts in web engineering and do lectures.

✨ Search across all episodes with custom AI . Give it a try below.

Here are some things people say about my podcast.

Josh Goldberg 💖 @JoshuaKGoldberg

There have been too many people on ConTejas recently I really really want to hear from: @ladyleet, @alexnmoldovan, @MichelleBakels, @gabe_g2i... ugh.

I'm getting FOMO from the last 2 weeks of just one podcast. You did this to me @TejasKumar_ :(

September 26, 2024 View on 𝕏 →
Michael Wheatfill @mwheatfill

I love the long format Tejas. It kind of reminds me of the Lex Friedman of web dev focused podcasts. The thoughtful questions and depth of answers was awesome to experience.

March 4, 2024 View on 𝕏 →
Guillermo Rauch @rauchg
Had a great podcast with @tejaskumar_ on:
- ◆ the physics of networks
- ◆ why move away from edge rendering
- ◆ fast vs slow global data transfer
- ◆ latency numbers every engineer (@jeffdean) and web engineer (@cramforce) should know
- ◆ RSC, PPR & Streaming
Dropping soon!
April 27, 2024 View on 𝕏 →
Shriram Balaji @shrirambalaji

highly recommend watching this video, if you haven’t, definitely needs more views! https://youtu.be/G-Js3CcD000?si=ufrOBE58U9q3ISSh
@tejaskumar_ has the ability to break things down calmly, and explain how computers work - from subatomic particles, electricity, hardware, software, firmware to servers and more.

March 13, 2024 View on 𝕏 →
Yoav Ganbar (🥑 Builder.io/Qwik) @HamatoYogi

Just finished listening to @TejasKumar_'s new podcast.
The first one is jam packed with tons of knowledge and great insights on what's going on in the web and software in general.
Awesome to hear him taking time to talk about @QwikDev especially 🙂
Highly recommend a listen 👌🏾

March 5, 2024 View on 𝕏 →
Atila Fassina @AtilaFassina

This was one of the most fun conversations I’ve had in a long time!
@TejasKumar_ is a great podcast host and an even better conversation partner!! ❤️

March 15, 2024 View on 𝕏 →
kvg @kevinvangundy

I love this sort of content-- right now AI is such a patchwork of poorly integrated tools that developers can't reason about unless they really really understand these core concepts.

March 8, 2024 View on 𝕏 →

I speak at conferences.

I've given about 50 talks in recent times. Here are the 10 most recent.

Invite me to speak at your event →

RAG++ London 2024
React Rally 2024
CascadiaJS 2024
Pixel Pioneers 2024
JNation 2024
JS Heroes 2024
CityJS London 2024
React Paris 2024
React Day Berlin 2023
RenderATL 2023

✨ Find answers across all of my talks with fine-tuned AI.

Here are some things people say about my talks.

Josh W. Comeau @JoshWComeau

I’ve said it before, but @TejasKumar_ has the most amazing energy when he speaks (and also in real life!). Amazing talk as usual about the tradeoffs React makes and why they’re really pretty good compromises.

June 1, 2023 View on 𝕏 →
Mark Dalgleish @markdalgleish

.@TejasKumar_ is such a charismatic speaker.

October 20, 2023 View on 𝕏 →
David K 🎹 @davidkpiano

Whenever @TejasKumar_ live codes in a presentation, it's absolutely stunning. Feels like he can turn almost anything into a 2-minute demo.

May 7, 2022 View on 𝕏 →
Cassidy @cassidoo

This talk by @TejasKumar_ is so inspiring. He’s got hemophilia, and he built an app that has a data visualization of the half life of his medicine! #DinoJS

June 20, 2019 View on 𝕏 →
Francesco @FrancescoCiull4

I met Tejas Kumar !!!! An amazing speaker and a super friendly, funny person in real life! Thanks for wearing my sticker @TejasKumar_!!

November 20, 2022 View on 𝕏 →
swyx @swyx

dude. i wish i had your energy, technical, and speaking skills! I dont know how you do it.

September 26, 2019 View on 𝕏 →

If you'd like me to speak at your event, please contact me below.

I wrote a book.

This book is a deep dive on how React works on the inside that can help you understand its internal mechanisms more deeply and unlock greater levels of fluency.

It was curated by me, published by O'Reilly, and thoroughly reviewed a number of peers including the React core, experts, friends, and more.

Buy

Here are things people say about this book.

Una 🇺🇦 @Una

I think I need to read @TejasKumar_'s new book 😅 Great talk about optimizing React w/useDefferedValue and useTransition at #ReactParis

March 22, 2024 View on 𝕏 →
Michelle Bakels @MichelleBakels

I got dropped into web dev via corporate mandate 6 yrs ago, so I love that Fluent React begins by outlining the ecosystem of the time — something I was largely disconnected from. This context has helped me appreciate everything I’ve learned so much more. @TejasKumar_ 🙏

March 23, 2024 View on 𝕏 →
Daniel Afonso @danieljcafonso

Fluent React is #1 best selling. As it should be 😁

March 23, 2024 View on 𝕏 →
Amanda 🌿 @hey_amandam

V excited for this. As someone who has used React for years but never as my only focus, it will be interesting to see how this deepens knowledge for me I'm a huge fan of @TejasKumar_ as a person and enjoy his teaching style so I expect to feel more of that same vibe in this book

March 14, 2024 View on 𝕏 →
Nisarg Parikh @nisargparikh90

Fluent React by @TejasKumar_ is an amazing book. Learning React by reading a book is a completely new experience.

March 7, 2024 View on 𝕏 →
Josh W. Comeau @JoshWComeau

Tejas previewed some of his book in his React Paris talk and it's seriously great. Goes deep into advanced topics. Just picked up a copy for myself 😄

March 23, 2024 View on 𝕏 →