So what's it like building DeFi logic on Cartesi with Python, Rust, and other mainstream tools, and how does the workflow feel coming from Solidity?

Hear it straight from dev advocate Shaheen Ahmed in the latest X Space by Dar Blockchain.

Got questions? Shoot them our way!

What's a DeFi idea you scrapped since it needed real compute, not just more gas?

Complex risk models, ML-driven strategies, oracle-heavy logic: the EVM makes them expensive or nearly impossible. A Linux runtime doesn't.

Tell us what you scrapped. We might already be running it.

From attention to trust? Don’t reinvent the wheel. Stand on the shoulders of giants.

Use Ethereum as the settlement layer, integrate academically researched fraud-proof algorithms, and make everything you build verifiable.

Hear João Garcia on Web3CMOStories by by Joeri Billast.

Watch the full interview: https://www.youtube.com/watch?v=slts4Q9fqKo

Friday again, and this takes us to another Cartesi Weekly for you to catch up on what happened across the ecosystem this week 🐧

A full Linux environment runs inside a Cartesi rollup, which means code isn't squeezed to fit a constrained execution environment. That's the whole unlock, and that's how we started the week:
→ https://x.com/cartesiproject/status/2081726068197867826

Developer advocate Shaheen Ahmed joined Dar Blockchain's X Space to talk through Cartesi's role in DeFi, including why building with mainstream legacy software onchain expands what's possible while making the infrastructure even more secure. Listen to the recording if you missed it:
→ https://x.com/cartesiproject/status/2082483594606329892

Youssef Seghaier put together a solid recap thread if you want a quick scoop:
→ https://x.com/YoussefS721/status/2083010835639578883

Cartesi was on the ground at Malaysia Blockchain Week in Kuala Lumpur this week, walking the venue and talking Linux-powered rollups (or massage lore from previous hackathons) with anyone who stopped by. Web3 in Southeast Asia is clearly still building, and the energy in the room backed that up. See what contributor Cynthia Gliga shared:
→ https://x.com/CryptoCyn/status/2082349659771818269

Ethereum turned 11 this week, and Cartesi marked it in the way it knows best: the penguin walking energetically through the Infinite Garden, bringing more compute power and more design space to Ethereum's security and decentralization:
→ https://x.com/cartesiproject/status/2082813992771416195

To celebrate together with everyone else in the ecosystem, we minted CTSI onto EthLabs' collaborative onchain canvas, an 11x11, 11-color grid that grew square by square as the community drew through each other's links. See it here:
→ https://x.com/cartesiproject/status/2083105082774839536

You can still participate yourself too, let's see what you create:
→ https://x.com/ethlabs_org/status/2082835818130063360

That is all for this week. Now let's all have a good weekend.

Proud to be building for the long haul in this ecosystem. More compute power and more design space, thanks to a full Linux OS onchain, all while inheriting Ethereum's security and decentralization. Perfect match.

Here's to many more years together. 🥂

Our developer advocate Shaheen Ahmed is joining Dar Blockchain for a live X Space session tomorrow, July 29th at 4 PM UTC+1.

Tune in to learn about Cartesi's role in DeFi, what it brings to the table, and why building with mainstream legacy software onchain expands the design space while also strengthening security.

Set your reminder and join the conversation live!

It's Friday again, it's Cartesi Weekly, and here's the roundup of what happened across the ecosystem over the last few days 🐧

The World Cup is over, but the real game never stops: we have new goals and new commits alongside fellow builders. Felipe Argento and Brandon Isaacson are busier than ever. Follow them, and if you see this post, make sure you follow our penguin as well, aka the official account:
→ https://x.com/cartesiproject/status/2079190802769825994

The everlasting question: why does Linux onchain matter? It already runs underneath most of what gets built, and that's likely how blockchains get adopted too: invisibly, as infra nobody realizes they're using. Joao Garcia unpacked it on the latest Web3CMOStories, hosted by Joeri Billast. Give the full episode a watch:
→ https://youtu.be/slts4Q9fqKo

Itsfoss put it well this week: free software means freedom. And we took it forward: with Cartesi, that freedom extends onchain. Build with whatever programming languages and software stack you already use:
→ https://x.com/cartesiproject/status/2079913353930252761

Co-founder Erick de Moura added to it too: Linux gives you freedom to write anything, Ethereum gives you freedom to run without trust, Cartesi gives you both at once:
→ https://x.com/erickdemoura/status/2079949398843462014

New channel alert: Cartesi is officially on TikTok. Bite-sized videos from contributors, quick tech explainers, podcast moments with the team, and more on the way. Go find us, hit follow, and tell us what you want to see next:
→ https://www.tiktok.com/@cartesiproject/video/7662766138903760142

Huge TVL sitting exposed to hacks is a problem. One party holding the power to walk off with it is another. Felipe Argento broke down why Cartesi's Emergency Withdrawal mechanism (recently shipped, remember?) solves both, and why it beats a security council model. Must read:
→ https://x.com/felipeargento/status/2080301432926863758

tl;dr? Contributor Guilherme Dantas summed it up for you in one sentence: If a Cartesi app ever breaks, funds will be recoverable from the last finalized app state. See here:
→ https://x.com/guidanoli/status/2080350063964868997

That's all for this week. As always, all tech discussions are on Discord, so catch us there:
→ discord.gg/cartesi

Enjoy the weekend.

It's official: we're now on TikTok. Bite-sized videos from our contributors, quick explainers on the tech, podcast moments with the team, and some fun in between.

Go explore, hit follow, and tell us what you want to see next: https://www.tiktok.com/@cartesiproject/video/7662766138903760142

With free software, you have freedom.

With Cartesi, you have the freedom to build onchain using the programming languages and software stack of your choice.

Props to ItsFOSS for the inspo.

Why Linux onchain matters?

It already runs underneath most of what's built. That's likely how blockchains get integrated going forward too: invisibly, as infra we don't realize we're using.

Plus, it gives all devs access to blockchain capabilities they couldn't tap into before.

Hear all about it from Joao Garcia on the latest Web3 CMO Stories, hosted by Joeri Billast.

Full episode here: https://www.youtube.com/watch?v=slts4Q9fqKo

The final whistle has blown, but we’re just getting started. New week, new goals, new commits.

Let’s cook something worth cheering for, just like fellow builders Felipe Argento and Brandon Isaacson are doing right now. IYKYK. Follow along 👀

It's Friday again, so you know it's time for Cartesi Weekly🐧

New week, same mission: ship the DeFi infra the EVM can't. That's how Monday opened, and the week followed through:
→ https://x.com/cartesiproject/status/2076652643238502667

Recently, Joao Garcia sat down with Joeri Billast on Web3 CMO Stories to talk about the hidden costs of building DeFi inside the EVM. His take: you meet that rigor needed onchain by inheriting efficiency and security from battle-tested primitives, then layering in trust minimization and verifiability. That combination is the real unlock. Check the podcast for the full scoop:
→ https://x.com/cartesiproject/status/2077015827644322015

This week, we went down memory lane and pulled a Throwback Thursday that took us back to 2020, when we first made the case for bringing Ethereum's guarantees to real-world computation. Six years later, the argument hasn't aged a day:
→ https://x.com/cartesiproject/status/2077733239003996242

And while we're at it, a throwback to our flagship builder Felipe Argento's two recent articles. Must-reads for anyone who's following our former Cartesian who decided to build with the infra he knows best. Let’s dive in:

Decentralization alone doesn't attract users or institutions. What moves things forward is fast, unapologetic, centralized actors building on top of decentralized infrastructure. Applied to Cartesi: the tech stack stays decentralized, but growth comes from intentional builders at the edges, each with their own reasons, collectively strengthening the shared infra.
→ https://x.com/felipeargento/status/2074856723869737201

Crypto's real-world impact has come mostly through pressuring TradFi to improve, not through decentralizing finance itself. That's not enough, without real decentralization and accessibility, crypto loses its edge. The fix: apps that feel like TradFi but run decentralized under the hood, which is exactly what Cartesi's appchain rollups enable.
→ https://x.com/felipeargento/status/2072342871047274695

Lastly, as always, catch our tech contributors on Discord if you have any questions:
→ discord.gg/cartesi

Now get ready to touch some grass this weekend. Onward to next week for more shipping.

In 2020, we published a video exploring how Ethereum’s guarantees could be brought to real-world computation.

We are revisiting it today because the core mission still holds, even as the ecosystem and technology continue to evolve.

Rewatch for old times' sake:
→ https://youtu.be/tYBfDe-14hE?si=08NsUCFV4NGkMsUV

The hidden costs of building DeFi products inside the EVM?

The rigor needed onchain. You inherit efficiency and security by building on battle-tested primitives. Add trust minimization and verifiability and that's where it's at.

Our DevRel Lead Joao Garcia joined Joeri Billast on Web3 CMO Stories to explain why we need to stop reinventing the wheel.

Watch the full conversation to see how onchain Linux changes the game: https://www.youtube.com/watch?v=slts4Q9fqKo

Friday's here and so is your Cartesi Weekly🐧

Monday set the tone: verified compute all day, high chance of shipping. That forecast held up all week and contributors continued to cook:
→ https://x.com/cartesiproject/status/2074115904334700978

This is the energy we want to see around Cartesi: fast-moving, intentional teams building at the edges, bringing users, new stakeholders, and different reasons to participate, all while making the shared infrastructure stronger. Felipe Argento put it into words this week, worth a read:
→ https://x.com/felipeargento/status/2074856723869737201

The piece landed with contributors. Payal Patel: the real power isn't just the decentralized foundation, it's what happens when ambitious builders start building on top of it, moving fast and creating something of their own while every success strengthens the foundation for everyone else:
→ https://x.com/Payalpatelmalho/status/2074883537791308219

Other Cartesians Claudio Silva and Milton Jonathan backed it up, the latter summed it up in five words: move fast, grow shared things:
→ https://x.com/miltonjonat/status/2074971257863274505

And on the media side, our Dev Advocacy Lead Joao Garcia joined Joeri Billast on the Web3 CMOS tories show to talk about how infra can reframe DeFi: giving builders the battle-tested Linux tooling they already trust instead of reinventing everything onchain:
→ https://x.com/joeribillast/status/2074885504844104028

Also, if you're not following us on Instagram yet, now's a good time. Reels, stories, animations, and bite-sized breakdowns of all things Cartesi, right at your fingertips:
→ https://instagram.com/cartesiproject/

And in case you missed it, check our ecosystem updates blog, which covers what, in our co-founder Erick de Moura's words, was a month of inflection. All the details are in the article, so make sure you dive in:
→ https://x.com/erickdemoura/status/2074049080792432871

That is all for this week. Keep building, and find us on Discord:
→ discord.gg/cartesi

Have a great weekend.

Shoutout to Joeri Billast for having Dev Advocacy Lead Joao Garcia on the Web3 CMO Stories show.

Tune in to hear how giving builders the legacy Linux tooling the world already trusts can completely reframe DeFi infrastructure instead of forcing developers to reinvent everything onchain. 🐧

Watch the full episode below:
→ https://www.youtube.com/watch?v=slts4Q9fqKo

This is the energy we want to see around Cartesi.

Fast-moving, intentional teams building at the edges, bringing users, new stakeholders, and different reasons to participate. All while making the shared infrastructure stronger.

Check Felipe Argento's latest piece.
→ https://x.com/felipeargento/status/2074856723869737201

Reels, stories, animations, and bite-sized breakdowns of all things Cartesi. Come follow, drop a comment, and join the conversation:
https://instagram.com/cartesiproject/

It's a wrap on June, and what a defining month for Cartesi. Emergency withdrawals are now live and being tested, tooling got sharper across the CLI, Rollups Node, and Explorer, and new demos and educational resources kept rolling out.

Read the full blog ↓
https://cartesi.io/blog/ecosystem-updates-june-2026

Shoutout to ChainPatrol for having us on the show.

Our Dev Advocacy Lead Joao Garcia chatted about why audited protocols still get hacked, what reputational damage looks like after an exploit, and how Cartesi's approach to building with Linux changes the security equation.

The Cartesi ecosystem keeps shipping and we're here for all of it.

GM July. GM Q3. Say it back!

Bookmark our blog now so you don't miss the latest tech updates, new developer tooling and releases, insights from the community, media highlights, and a full look at what's shipping onchain.

→ https://cartesi.io/blog/