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Tejas Kumar

@tej.as
6.8K followers 234 following 381 posts

AI Engineer at IBM, Berlin. Host, ConTejas Code Podcast. Best Selling Author, Fluent React. Keynote Speaker. Investor. Advisor. tej.as

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Tejas Kumar @tej.as · 14/09/2026
I turned my AI Engineer Europe talk into a post: what an agent harness is, and how a harness took GPT-3.5 Turbo from lying about success to finishing the job in 6 iterations, with the same prompt. tej.as/blog/what-is-an-agent-harness
tej.as
What Is an Agent Harness? Harness Engineering Explained
An agent harness is everything around an AI model that grounds it in reality: tools, context, guardrails, the loop and verification. How to build one.
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François Best @francoisbest.com · 26/03/2026
Let’s go, @tej.as & @sarahdayan.com kicking off #ReactParis 2026 The lineup is amazing 🤩
Sarah and Tejas on stage with all the speakers on a slide
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cityjsconf.bsky.social @cityjsconf.bsky.social · 12/04/2026
UX is changing with AI — from clicking clunky interfaces to speaking commands naturally. 🚀 @tej.as shows how JavaScript developers can adapt with practical tips and live demos. 🎟️ Tickets: london.cityjsconf.org/ #AI #UX #JavaScript #software engineer #frontend #WebDevelopment #cityjsconf
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WebExpo Conference @webexpo.bsky.social · 14/04/2026
AI engineering is more than a glorified fetch call to an LLM. 💻 At his workshop, @tej.as will take you beyond the prompt: ✅ Building and orchestrating agents ✅ Hands-on with RAG, OpenClaw, and the 2026 AI stack ✅ What happens inside the "black box" of AI 🎫 Limited spots!
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Martin Michalek @machal.bsky.social · 16/04/2026
This year's #FrontKon conference is shaping up to be a big one: – Sara Polak (AI from a strategic and philosophical perspective) – @tej.as (AI & future of frontend development) – @matuzo.at (accessibility in React) See you in Prague on October 6th? 🇨🇿 #WebDev #Frontend #Prague www.frontkon.tech
frontkon.tech
FrontKon#26 – frontend event in Prague
Full-day live conference of the Frontendisti.cz community
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R "Nearest" Nabors @nearestnabors.com · 16/04/2026
Writing recap post of AIE, and found this in my photos! What a great time! Only complaint: afterparty needed a little more wub-wub on the floor! <3 @tej.as @nickyt.online
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Tejas Kumar @tej.as · 01/03/2026
honestly, @cursor_ai has the best execution of context engineering ive ever seen credit where credit is due
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Tejas Kumar @tej.as · 28/02/2026
did skills.md kill mcp (model context protocol)? a lot of people are talking about this so i thought this excerpt from the latest podcast episode might help distinguish these two concepts in ai engineering full ep in reply
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Tejas Kumar @tej.as · 27/02/2026
if you've ever had trouble understanding mcp (model context protocol), i made a podcast episode that explains this. i hope it helps? (full ep in reply)
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Tejas Kumar @tej.as · 26/02/2026
❗ llms are not agents and agents are not llms here's a clear explainer of what an agent is and how it compares to regular language models from the podcast for those who are feeling a bit behind full episode in reply
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Tejas Kumar @tej.as · 26/02/2026
nobody asked but here’s my year round fitness program that i heavily enjoy - jan-mar: bulk up (hypertrophy) - apr-jun: cardio base building (aerobic capacity) - jul-sep: peak cardio performance (anaerobic capacity) - oct-dec: strength (1rm)
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Tejas Kumar @tej.as · 25/02/2026
context engineering in ai is a thing because it's really just working memory optimization. both humans and machines have distinct working memory vs. long-term storage mechanisms. more on this in the podcast (links in reply) h/t @hubermanlab for a great episode on memory (also linked in reply)
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Tejas Kumar @tej.as · 24/02/2026
every time i ask someone if they can be an ai engineer, they say "no because i don't know anything about machine learning" ...these are very different topics. here's an excerpt from the contejas podcast that clearly defines what ai engineering is full episode in reply
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Faris Aziz @farisaziz.com · 23/02/2026
Clearly copy pasta from brain is a skill
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Tejas Kumar @tej.as · 23/02/2026
imagine a coding interview where they test how well you memorize code
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Cal Irvine @calirvine.com · 19/02/2026
I always found the answer to be the least interesting part anyway, and this hasn’t changed with AI. Doing it asynchronously is silly as heck though, you won’t get any signal from that.
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Whitney McGruder: Author Coach | Publisher @whitneymg.bsky.social · 18/02/2026
Such a great reminder, everyone is human and growth comes from learning not comparing ☕✨
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Tejas Kumar @tej.as · 23/02/2026
I just created a podcast episode I'm quite proud of: what is AI engineering and how to become an AI engineer. Links in reply.
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Tejas Kumar @tej.as · 22/02/2026
the bar is so low.
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Tejas Kumar @tej.as · 21/02/2026
how to get a job at your dream company: cold applying doesnt work anymore. just listen to how @mkrl.xyz got an interview at @supabase.com when they previously ignored his emails.
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Tejas Kumar @tej.as · 20/02/2026
i think @vercel.com does devrel extremely well because it's more "build in public" than shilling. you don't need "devrel" in your title. you just need to build things youre proud of and share them.
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Tejas Kumar @tej.as · 19/02/2026
Leetcode interviews don't make sense anymore with AI. Is it cheating or is it just modern engineering? Is tech interviewing totally broken? @mkrl.xyz and I discussed this recently on the pod.
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Tejas Kumar @tej.as · 18/02/2026
Don't Idolize Tech "Superstars". They drink coffee and have bad days just like you. Stop putting senior engineers on pedestals. Great advice from @mkrl.xyz on the latest podcast.
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Tejas Kumar @tej.as · 17/02/2026
If you're looking to network effectively at an event, always leave the "mouth" open. Here is the Pac-Man rule explained by @mkrl.xyz. 👻
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Tejas Kumar @tej.as · 17/02/2026
Thrilled about the continued hypergrowth of the ConTejas podcast.
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Tejas Kumar @tej.as · 15/02/2026
Got the Sunday Scaries? Stop trying to "relax." Anxiety and Excitement are the exact same biological signal (high arousal). The only difference is the story you tell yourself. Don't calm down, get ready.
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Tejas Kumar @tej.as · 14/02/2026
Steve Jobs wasn't the best coder in the room. Neither is the person who just got promoted over you. The best communicators aren't always the smartest engineers—they are the ones who make you feel something. Here is the difference explained:
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Tejas Kumar @tej.as · 13/02/2026
Want to know if you're actually listening or just waiting to talk? Try the 4 L's: Listen, Loop, Label, Lead. If you can get the other person to say "Exactly!" before you pitch your idea, you've already won. Full episode in reply.
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Barret Blake @barretblake.dev · 10/02/2026
Other key phrases that mean the same thing: "Delighting our customers" "Above and beyond" "Go the extra mile" "Standing out"
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cityjsconf.bsky.social @cityjsconf.bsky.social · 12/02/2026
Only 2 months to go until we celebrate JavaScript in style! 🎉 3 days of talks & workshops sharing the latest trends with top speakers @tej.as @nodeland.dev @nikkitaftw.bsky.social @rich-harris.dev @addaleax.bsky.social @danielroe.dev Secure your spot: london.cityjsconf.org
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Tejas Kumar @tej.as · 12/02/2026
no one cares about your reasons when the room is hot, tired, or checked out. instead, you communicate well when you do so with clarity and brevity: short and sweet.
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Tejas Kumar @tej.as · 11/02/2026
Stop rambling. If you can’t summarize your thesis in one sentence, you don’t understand it well enough to teach it. Here is the template: "I believe [X] because [Y], so we should [Z]." Try it for your next meeting.
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Tejas Kumar @tej.as · 10/02/2026
"We are a family" usually means "We expect you to work unpaid overtime." 🚩 If the vibes are off, it’s because the alignment isn't there. It’s the corporate equivalent of the "ick." Here is why you should trust your peripheral vision when evaluating a company culture.
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Tejas Kumar @tej.as · 09/02/2026
Ever get a weird vibe from a leader but can't explain why? Your brain detects when words ("I don't care about money") don't match actions (turning a non-profit into a for-profit). Trust your gut. 🧠 We explore this in the latest episode of ConTejas on effective communication. Full ep in reply.
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Tejas Kumar @tej.as · 09/02/2026
NEW on ConTejas Podcast: How to communicate well. I am often complimented on my public speaking skills. This episode is a deep dive on things I've studied and methods I use to deliver great talks. I hope this is helpful.
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Tejas Kumar @tej.as · 08/02/2026
im really sorry if this feels like spam but this may be the best take ive seen about ai replacing artists (maybe including coders) and how to protect against it
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Tejas Kumar @tej.as · 07/02/2026
putting in the reps leads to mastery. in this recent episode of the podcast, Diazno shares inspiration from how Steph Curry relentless practice led to him becoming one of the greatest @nba.com players of all time full episode links in reply
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Tejas Kumar @tej.as · 07/02/2026
any guess what monday's episode of contejas podcast is about?
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Tejas Kumar @tej.as · 06/02/2026
in case you’re wondering how the weather is in berlin
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Tejas Kumar @tej.as · 05/02/2026
"Communication is not what you say, it's what they understand." This quote legitimately shook me from the ConTejas Code podcast where it immediately explained why people like my talks as much as they do: I instinctively/subconsciously make sure they understand, not just that I speak.
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Tejas Kumar @tej.as · 05/02/2026
“f you money” just reveals a really dark heart. i have a lot of money and could technically retire today if i wanted, but no matter how much money i have, id never think/say “f you” but instead i can (and do) pump it into things to help them grow healthily.
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cityjsconf.bsky.social @cityjsconf.bsky.social · 04/02/2026
UX is shifting with AI — gone are the days of clicking clunky boxes. Speak, create& interact. This talk @tej.as shows how #JavaScript developers’ roles are evolving, with practical steps, live demos, and AI-driven insights. Get tickets: london.cityjsconf.org/ #CityJSConf #ConteJAS #AIDriveNUX
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Tejas Kumar @tej.as · 03/02/2026
This is such an incredible take on how AI is affecting (and will affect) the music industry from producer Diazno on the ConTejas Podcast: elevator music can be replaced by AI, but human experiences can't (yet?) Full episode in reply.
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Tejas Kumar @tej.as · 02/02/2026
NEW on ConTejas Podcast: award-winning music producer Diazno on how to unlock creativity, execution, and leadership across any organization. We cover: ◆ How to get buy in ◆ AI in Music ◆ Taste vs. Talent Links to other platforms in reply.
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Tejas Kumar @tej.as · 01/02/2026
Fitting for Sunday: on the ConTejas Code Podcast, pro athlete and @crossfit coach Isaac Akinsete opened up about his faith and how staying spiritually healthy reinforces physical and mental health. Really good to chew on over the weekend. Full episode in reply.
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Tejas Kumar @tej.as · 31/01/2026
where are the short kings? maybe ur short because you trained too hard as a kid
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Tejas Kumar @tej.as · 30/01/2026
How do you get a six pack? It's not really by working out, but more by eating right. Pro athlete and @crossfit coach Isaac Akinsete explains in the latest ConTejas Code podcast on engineering optimal health. Links in reply.
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Tejas Kumar @tej.as · 30/01/2026
ai is kinda giving web3 vibes these days
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React Paris Conf' -by- BeJS @bejs.bsky.social · 29/01/2026
🚀 @tej.as is speaking at #ReactParis 2026 Expect a live ConTejas #AI Panel Discussion you don't want to miss😉 More ℹ️ to come, meanwhile, lock in your IRL pass. 👉🏼 react.paris #conference #speaker #reactjs
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Tejas Kumar @tej.as · 29/01/2026
On the recent ConTejas Code Podcast episode, sports scientist Isaac Akinsete and I teased out an actionable fitness protocol for desk workers that can start immediately: no gym or equipment necessary. It was really a great discussion. Full episode links in reply.
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