Emanuel Guzman

Profile

Full stack developer with 8+ years building software and founder of Cosmos, a payments and commerce ecosystem for Latin America on Stellar, Solana and Monad. I design and build products end to end: TypeScript SDKs, APIs, wallets, smart contracts and developer platforms.

Experience

1. Founder · Cosmos · Cosmos Pay

   Feb 2026 – present

   Salta, Argentina

   A multichain payments and commerce ecosystem for Latin America. I lead product and engineering for Cosmos Pay: the Payments API, a non-custodial wallet, a TypeScript SDK and a developer platform on Stellar, Solana and Monad.

2. CEO · CloudyCoding

   Feb 2018 – present

   Argentina

   A software studio: custom websites, apps and backends for clients, open source libraries, and free infrastructure for the local tech community.

3. Full Stack Developer · SaltaDev

   Feb 2025 – present

   Salta, Argentina · remote

   Front end and full stack development for the SaltaDev community, plus hackathons and tech events across the region.

4. Independent developer · Freelance

   Nov 2018 – present

   Remote

   Web and backend projects for clients with Node.js, Java, Go and MongoDB: e-commerce, real-time platforms with WebSockets, bots and dashboards.

Selected projects

• Cosmos Pay — Payment gateway for LATAM

  2026

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

  TypeScript · NestJS · Astro · PostgreSQL · Stellar · APISIX

• Cosmos Pay Wallet — Cross-platform non-custodial wallet

  2026

  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.

  TypeScript · Astro · Rust · Kotlin · Stellar

• BancaSDK — Multi-bank TypeScript SDK

  2026

  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.

  TypeScript · Zod · Vitest

• SolaDB & MonaDB — Private, replicated on-chain storage

  2026

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

  Rust · Solidity · TypeScript

• ASide & ArkaCDN — SDKs to build on Arkiv

  2026

  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.

  TypeScript · WebCrypto · Arkiv

• StellarOrchestra — AI agents that get paid via x402

  2026

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

  TypeScript · Node.js · Stellar · Cloudflare Tunnel

Achievements & community

• Selected · Scale Track — Código Alebrije 2026, Mexico City, with Cosmos (Stellar Development Foundation · BAF)Mar 2026
• 1,000+ downloads in 3 days — ArkaCDN and ASide, open source SDKs for Arkiv (npm · Arkiv Network)Mar 2026
• Builder · ImpactaBootcamp — Soroban, trustless escrow and product mindset (Trustless Work · BAF)Feb 2026
• 15,000+ downloads in one week — MacroClickJS, an integration for Banco Macro’s gateway (npm · Open source)Oct 2025
• Speaker · Blockchain Salta — A conference covered on local radio and TV (DESAFIA · SaltaDev)Sep 2025
• Sponsor · Hackathon del Milagro — Free hosting for the winning projects (CloudyCoding · SaltaDev)Sep 2025
• Hacker · Ethereum 2025 — A global Ethereum hackathon and ETH Argentina: 96 h of code (Ethereum)2025
• NASA Open Science certificate — Open science principles and practices (NASA)Oct 2024

Skills

Languages

TypeScript · JavaScript · Java · Python · Go · Rust · Solidity

Backend

Node.js · Express · NestJS · Prisma · PostgreSQL · MongoDB · MySQL

Frontend

Astro · React · Next.js · HTML · CSS

Blockchain

Stellar (SEPs, Soroban) · Solana · Monad / EVM · Arkiv · x402

Infrastructure

Docker · Cloudflare · APISIX · GitHub Actions · Git