Emanuel Guzman

Turning complex ideas
into real products.

I'm Emanuel Guzman. I design and build custom software, payment integrations and blockchain products for companies and startups across Latin America — from diagnosis to production, working directly with you.

Tell me about your projectSee services
8+Years building
Shipping software since 2018, freelance and at CloudyCoding
15k+npm downloads
MacroClickJS in its first week
20+Open source projects
SDKs, wallets and protocols
Emanuel Guzman speaking into a microphone, wearing a Stellar Summit 2026 T-shirt

About

Building with
Clarity and Intention.

I'm a full stack developer and the founder of Cosmos, an ecosystem connecting payments, commerce and blockchain across Latin America. Today I'm focused on Cosmos Pay: an interoperable payment gateway that works in local currencies with native USDC.

I believe good technology isn't just the kind that works — it's the kind people understand, can integrate easily, and that solves a real problem.

Now

See full CV
import { Client, Assets } from '@cosmosapp/pay_sdk';

const client = new Client({
  apiKey: process.env.COSMOS_PAY_API_KEY,
});

// Charge in USDC on Stellar
const pay = await client.paymentIntents.createPay({
  destination: 'GCAL…7AOO',
  amount: '25',
  asset: Assets.USDC,
});

pay.uri; // settled in ~5 s
  • TypeScript
  • Node.js
  • Stellar · Soroban
  • Solidity
  • Rust
  • Go

Services

What I can build for you.

Tailored solutions for companies and startups that want to launch fast, get paid better and scale without technical debt.

  • Custom software

    Web platforms, dashboards, APIs and backends built around your operation, production-ready and made to scale.

    • TypeScript
    • Node.js
    • Astro / React
    • PostgreSQL
    I want this

  • Payment integrations

    Get paid through local gateways, banks and stablecoins: checkout, payment links, webhooks and reconciliation. From Mercado Pago to USDC with Cosmos Pay.

    • Cosmos Pay
    • Mercado Pago
    • USDC
    • Webhooks
    I want this

  • Blockchain products

    Wallets, smart contracts and dApps on Stellar, Solana and EVM chains, focused on security and an experience anyone can use.

    • Soroban
    • Solidity
    • Rust
    • Stellar SDK
    I want this

  • SDKs & APIs for developers

    Libraries, docs and developer platforms so other teams can integrate your product in minutes. Like MacroClickJS: 15,000 downloads in one week.

    • npm
    • OpenAPI
    • Docs
    • CI/CD
    I want this

Process

From diagnosis to production.

You work directly with me, with a clear scope and progress you can try every week.

  1. Diagnosis

    A 30-minute call to understand the problem, your users and what has to happen for the project to work.

  2. Proposal

    Scope, timeline and budget in writing before a single line of code is written.

  3. Build

    Weekly deliveries with real progress you can try and comment on.

  4. Launch

    Production deploy, documentation and support after launch.

Book the diagnosis call

Projects

Breaking down problems, exploring ideas, and shipping meaningful solutions.

  • Cosmos Pay

    Payment gateway for LATAM

    • Founder
    • Product
    • Stellar · Solana · Monad

    Payments infrastructure for developers: payment intents, webhooks, stablecoins and fiat ramps, settling in seconds for fractions of a cent.

  • Cosmos Pay Wallet

    Cross-platform non-custodial wallet

    • Extension
    • Android
    • Desktop

    A Stellar wallet shipped as a browser extension, Android app, web and desktop: send, swap and track activity, with your 12 words as the only key.

  • BancaSDK

    Multi-bank TypeScript SDK

    • Open source
    • npm
    • 15k+ downloads

    The evolution of MacroClickJS, the library for Banco Macro’s payment gateway that passed 15,000 downloads in its first week. One client for banking integrations.

  • SolaDB & MonaDB

    Private, replicated on-chain storage

    • Protocol
    • Solana
    • Monad

    Files encrypted in the browser, sharded with Reed-Solomon and kept by nodes paid for every copy, checked with on-chain storage proofs.

  • ASide & ArkaCDN

    SDKs to build on Arkiv

    • Open source
    • npm
    • Arkiv

    ArkaCDN turns Arkiv into a content distribution layer; ASide adds profiles, a social graph, feeds, events and 70+ features. Over 1,000 downloads in 3 days.

  • StellarOrchestra

    AI agents that get paid via x402

    • AI
    • Stellar
    • x402

    A self-hosted AI agent orchestrator: register your agents, share API keys and charge per task with x402 payments on Stellar.

Got a similar project?

Let's talk

Achievements

A reflection of consistent work
and real impact

  1. Selected · Scale Track

    Código Alebrije 2026, Mexico City, with Cosmos

    Stellar Development Foundation · BAF

  2. 1,000+ downloads in 3 days

    ArkaCDN and ASide, open source SDKs for Arkiv

    npm · Arkiv Network

  3. Builder · ImpactaBootcamp

    Soroban, trustless escrow and product mindset

    Trustless Work · BAF

  4. 15,000+ downloads in one week

    MacroClickJS, an integration for Banco Macro’s gateway

    npm · Open source

  5. Speaker · Blockchain Salta

    A conference covered on local radio and TV

    DESAFIA · SaltaDev

  6. Sponsor · Hackathon del Milagro

    Free hosting for the winning projects

    CloudyCoding · SaltaDev

  7. Hacker · Ethereum 2025

    A global Ethereum hackathon and ETH Argentina: 96 h of code

    Ethereum

  8. NASA Open Science certificate

    Open science principles and practices

    NASA

Ecosystems & communities

  • Stellar
  • Solana
  • Monad
  • Ethereum
  • Arkiv
  • Stellar Development Foundation
  • Blockchain Acceleration Foundation
  • Trustless Work
  • SaltaDev
  • DESAFIA

Contact

Tell me what you want to build.

If you have a project, a payment integration or an idea you want to validate, write to me. I'll reply within 48 hours.

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I only use your details to reply to you. No spam. Privacy policy

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