The Arc developer experience: Hear from early builders at Sequence, Dynamic, and BuFi
Speakers

Corey Cooper is a technologist with experience spanning development, founding and scaling products, solutions engineering, and developer relations. He blends vision, creativity, and strong business acumen with deep technical expertise to drive go-lives, product launches, and high-impact developer experiences. Corey is known for his ability to navigate across roles, lead cross-functional initiatives, and deliver scalable, well-crafted solutions that support both product growth and customer success.

Founder/CEO of BUFI—an AI-native, stablecoin-first financial workspace for global remote teams.Tomas is a Self-taught full-stack dev and blockchain builder shipping at the edges — focused on emerging markets, climate, decentralized energy autarky, and financial inclusion. AI-first. 20+ hackathon wins with prizes distributed, 5+ years leading remote teams as a crypto native. Lives for the build.
SUMMARY
What is it like to build on and work with the Arc team? Hear straight from early adopters at BuFi, Dynamic and Sequence.
Peter Kieltyka (CEO and Co-Founder at Trails and Sequence), Ellie Farrisi (Lead Software Engineer at Dynamic) and Tomas Cordero (CEO at BuFi) joined Corey Cooper (Senior Manager Developer Relations at Circle) at the inaugural Arc Studio event in Buenos Aires to talk about what they are building on Arc and their experience working with the Arc team.
Are you a builder? Be sure to:
- 👉 Browse our docs: https://docs.arc.network
- 👉 Get developer support: https://discord.com/invite/buildonarc
- 👉 Follow us on X: https://x.com/Arc
- 👉 Read our blog: https://www.arc.network/blog
- Arc testnet is offered by CTS. CTS is a software provider and does not provide regulated financial or advisory services. You are solely responsible for services you provide to users, including obtaining any necessary licenses or approvals and otherwise complying with applicable laws. Arc has not been reviewed or approved by the New York State Department of Financial Services. The product features described in these materials are for informational purposes only. All product features may be modified, delayed, or cancelled without prior notice, at any time and at the sole discretion of CTS. Nothing herein constitutes a commitment, warranty, guarantee or investment advice.*
TRANSCRIPT
COREY: So thank you all for for joining this panel. We've got some really, strong ecosystem partners who are either support in the ecosystem from, wallet infrastructure or, also too from like a consumer base.
I think what I'll first like to do is, is allow for, each of the, the partners who are on stage to, to, to give like a quick intro what they offer, and how, what they're bringing is going to help the ecosystem grow.
And then we'll jump into some questions. So. So, Peter, I guess I'll start with you, the to introduce your, your company and what you're providing to the ecosystem.
PETER: Hey, everyone. Thank you for having me. And thanks, Corey. Yeah, for being a great ambassador. Yeah. So my name is Peter Kieltyka. I'm the CEO of Sequence.
We are a developer platform and infrastructure stack for chains, apps and building any kinds of systems. We are very expansive, platform where we have wallets. Transaction delivery systems, indexers, standard library contracts, very expansive, kind of anything the developer needs to really power the application layer. In particular, one of the, and we support over 50 chains in particular, what we're working with Arc and I'm very excited on is our latest project at Trouncing Tomorrow called Trails, which, you know, I'll talk more.
There's a lot more to talk about on this topic, but it's a really fundamental, massive problem of fragmentation that, trails in sequence, does a really fantastic job on solving, including, you know, support with MetaMask, which is, you know, quite, novel and groundbreaking and very important. So thank you.
ELLIE: So, hi, I'm Ellie Farrisi. I'm a lead software engineer at Dynamic. Thank you for having me. If you're not familiar with dynamic, we do wallet infrastructure. So we are really the layer that sits between your authentication and accessing, docs, etc., across 50 plus different chains. So if you log in with a social account, you can connect your wallet or you can actually get one of our embedded wallets that we offer through MPC.
I lead the embedded wallets team, so that's definitely there. I'm very excited about in this industry. And with Arc, we support it similar how we do many of our other chains through this wallet connection and via, these embedded wallets that you can automatically log on through the developer portal. They can just toggle on Arc. It's already there live today. And they can generate a, a, embedded wallet compatible, via Dynamic.
TOMAS: Hello, everyone. My name is Tomas. The founder of BuFI or BuFinance. It's a project that started in, remote workhub here in Argentina in Aleph, in Crecimiento, thanks to the work that the guys did. We're all now here in dev connect, in Buenos Aires. And during that time, we developed the concept for BuFi.
Now it's practically built. And BuFi are financial agile workspaces for global teams. So basically it's a blank page with a bunch of features that you can drag and drop to create a workspace for your projects. It's very modeled after Notion. Yeah, Notion for finance, pretty much. And the idea that we're trying to to do is bring the best UX UI possible. And that's what we're very excited about doing with Arc. We've built a platform with, Circle Developer Services. So I'm really excited about combining all of the new features that are coming in from Arc with the existing services from Circle to create. Yeah, an outstanding UX UI that's cross-platform so we can onboard, millions of users, through web3 in a simple way, without them knowing that they're actually interacting with web3. Hopefully, hopefully we'll see.
COREY: I love it, love it. Keep the mic in your hand because, I ask you another question and then we'll go back. But, Tomas, can you you can talk about, when you first heard about Arc, like, what was, you know, the thing that hooked you in what you said. You know what? This is not a of chain. I need to take this serious, and I need to integrate.
TOMAS: Yeah. When I first heard about Arc, I was honestly pumped because I had been working with Circle developer tooling for a couple months, and I could really see how, how that thought behind every API that was put out and the ability that it gave developers to actually create novel applications that advance web3 UX, UI experiences, and yeah, the features such as, native gas being USDC, through its development as a new ecosystem, that works with other ecosystems as well as Circle has done in the past, positioning USDC as this asset that, you know, has a bunch of liquidity in all of these chains.
I can see a lot of potential for this ecosystem to just spread out and, yeah, do great for for everyone.
COREY: That's nice. Nice, I guess. Ellie, you know, your company has done an excellent job, of bringing wallets into applications through authentication, custody, and other things. You, designed, like, you know, social sign ins.
How does, you know, Dynamic, in Arc, you know, some type of combination where, we see more cash balances at staples.
ELLIE: Yeah, I think, over, over the last. Yeah, like 12 months, 18 months, we've we've all kind of seen this influx from the traditional finance world, the excitement around stablecoins. And so I think with, with dynamic learning about what Arc is doing, it just makes so much sense for us as where we've been moving towards as an industry with embedded wallets, what we're seeing that like the traditional finance market wants, and needs, frankly.
And so I think understanding like the, the way that Arc is able to utilize, the USDC, gas payments, etc., I think is really just aligned with our vision of the customers we were talking to. You know, we've had we have conversations with a lot of the the large players in the financial tech world and even from like Wealthsimple, who runs out of out of Canada, that need these, this wallet security and wallet management.
So I think for, for, for having global cash, USDC, it's, it's really what our bread and butter is that Arc is facilitating on an accelerated scale.
COREY: Thanks. That's Peter, you've been building it, at the base layer, like the smart contract layer for a long time, right. You know, trails, you know, I got to see the product, from the beginning and see where it is today. Amazing work you've done under the hood. Can you talk about how trails interacts with some of our primitives on Arc, like CCTP and what that does for the Arc ecosystem of end users?
PETER: Yes, absolutely. So I think, you know, obviously when we heard of Arc, we're very excited to work with you guys. And CCTP is already been a very ground breaking, breaking, you know, interoperability protocol. And bridge for some time in some years, very novel and with CCTP V2, I think having a really credible and transparent bridge that everybody understands and trust coming from Circle, it was a really obvious choice for us to interoperate on top of the interaction for us is effectively trails allows. It's like a transaction rails protocol that can take a set of transactions. Merchandise them into a certain intent address, and then you can fire it, and it'll just kind of orchestrate across the chain, permissionless. It's really neat. And one of the interesting parts from a cross-chain perspective, of course, is being able to you need the bridge. The bridge is really important. Bridge has to be secure. As you know, you have to make sure that when funds are moving across it, it's they're incredible.