@_JustinCast

Ethereum Blockchain Engineer ⛓ Follow me on https://xitter.cf/t.co/wSOZpJpPTF. https://xitter.cf/t.co/dXA6t95eQR…

 San Carlos, Costa Rica
Joined May 2011
  • Tweets690
  • Following640
  • Followers333
19Media
Part of the students in the most recent class of the Solidity course that I’m teaching 👨🏻‍🏫
2
10
521
JustinCast retweeted
Kevin Wolf
@kvnwolfOct 6

One prompt-layout change cut my AI agent's model cost by 76%

Article · @kvnwolf
3
4
8
1,111
Meet the new Stitch, your vibe design partner. Here are 5 major upgrades to help you create, iterate and collaborate: 🎨 AI-Native Canvas 🧠 Smarter Design Agent 🎙️ Voice ⚡️ Instant Prototypes 📐 Design Systems and DESIGN.md Rolling out now. Details and product walkthrough video in 🧵
984
4,666
2,274
41,131
18,772,893
JustinCast retweeted
Naval
@navalMar 16
Coding an app is the new starting a podcast.
1,549
2,351
632
27,079
3,010,677
JustinCast retweeted
Claude
@claudeaiMar 14
A small thank you to everyone using Claude: We’re doubling usage outside our peak hours for the next two weeks.
1,868
3,434
2,728
47,488
12,780,187
I built something for developers who struggle with prompt engineering. Meet Promptly — an AI prompting trainer designed to help you sharpen your skills through hands-on practice. 🔗 Try it out: promptly-app-sable.vercel.ap…
1
73
JustinCast retweeted
Beja@0xBeja8 Mar 2024
A few months ago I began creating content and raising awareness about the opportunities for developers through OSS and Web3. Genuine and authentic content fueled by my personal brand and experiences. Yesterday 50 devs signed up for the first official @OnlyDust_com LATAM event.
1
2
1
20
1,975
And liftoff!! 🚀 As a community we're partnering with @ForteGlobal to onboard new developers into the Ethereum ecosystem During the next 7 weeks we're kicking of an intro course to onboard over +30 woman to web3 by the hands of @_JustinCast replicating @EthKipu 's educ content
1
2
7
398
JustinCast retweeted
IQ
@IQofficial23 Nov 2023
Meet the brains from BrainDAO building IQ v3 which includes new dapps like IQ Code (first #AI for smart contracts) and IQ.social (AI hub for crypto news). There are also updates to IQ.wiki and the IQ tokenomics. iq.wiki/blog/WCiojw3P3gZ5UsM…
2
12
4
35
12,297
Did you know? 🤔 Etherscan currently supports a simple display of ERC-4337 Account Abstraction transactions Let's delve into how ERC-4337 transactions are executed on Ethereum 🧵
36
168
35
509
102,275
I'm thrilled to share that I'll be speaking at Ethereum Costa Rica Day, the very first in-person event of the Ethereum Costa Rica community! Join me on November 14th for an introduction to creating digital assets using the ERC20 token standard Ξ. ethereum.cr/day
3
99
nextjs.org/conf/ticket/justi…
61
JustinCast retweeted
ETH Kipu@ETHKipu25 Sep 2023
Mañana puedes unirte a una sesión para aprender a navegar en Github y cómo comenzar a contribuir en Ethereum.org 💜 Toda la info 👇
ethereum.org Community@ethdotorg25 Sep 2023
📢 ¡Calling all hispanohablantes! 📢 ¿Quieres empezar a contribuir en proyectos de código abierto pero no sabes cómo usar Github? 😶 Únete a nosotros mañana, 4 p.m. UTC, en una sesión sobre cómo navegar en Github y cómo comenzar a contribuir en Ethereum.org 💙 🔗⤵️
1
3
25
1,314
🔥
Ethereum Costa Rica🇨🇷 ETH Pura Vida 1st Nov 2025
@EthereumCR5 Sep 2023
🇪🇸 ¡Estamos emocionados de presentar a nuestro primer partner y avenue para Ethereum Costa Rica Day! 🇬🇧 We´re excited to present our first partner and avenue for Ethereum Costa Rica Day! @texastechCR 🏛️🤘🎉🐎👩‍🎓👨‍🎓 📅 18 de Noviembre 2023 📌 Texas Tech University CR - Av. Escazu
2
4
220
New devs on the making ⌨️ 💻😎 Este fin de semana fue la 2nda clase de Apriendiendo a Programar #Solidity en #CostaRica Liderada por el crack @_JustinCast y apoyadas por nuestros partners @EthKipu y @Teccr en San Carlos. ethkipu.org/solidity-costa-r…
1
4
9
384
Dicen dicen....que vamos a tener un lugar chivisima para el Ethereum Costa Rica Day 🔥🔥👀
2
4
1
11
535
🛠️ ¡Desarrolladores, atención! 🛠️ ¿Por qué considerar Ethereum para tu próximo proyecto? Aquí hay algunas ventajas que hacen que Ethereum sea una opción emocionante para los constructores de aplicaciones:
1
1
3
180
JustinCast retweeted
ETH Kipu@ETHKipu9 Aug 2023
Aterrizamos en Costa Rica 🇨🇷 Pura vida y puro aprendizaje 🫡 👉 El 19 de Agosto comienza un nuevo curso para aprender a programar Solidity En esta ocasión la sede será Santa Clara, San Carlos, Alajuela, Costa Rica 📍
5
7
1
28
2,414
¡Atención comunidad de Ethereum Costa Rica! Estamos emocionados de anunciar el primer evento de todo un día: ¡Ethereum Costa Rica Day! 🇨🇷💻🚀
2
10
23
1,111
JustinCast retweeted
Uniswap
@Uniswap29 Jun 2023
1/ Uniswap v4 lets developers create hooks that integrate with the Uniswap Protocol. One hook we’re excited about is Time Weighted Automatic Market Makers (TWAMM), which can minimize the price impact of large trades. Let’s dive into what it is 🧵
15
48
6
226
66,603
Load more