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dubzn/README.md

Santiago Galvan

Backend Engineer | Blockchain

I'm a backend engineer with 5 years of experience building and operating production APIs, background workers, payment flows, release pipelines, and blockchain infrastructure.

At Caravana Studio, I work as the founding backend engineer on Jokers of Neon, a production onchain card game available on the App Store, Google Play, and desktop that has processed 250K+ Starknet mainnet transactions since December 2025.

For my next role, I'm interested in backend and blockchain infrastructure positions that combine production ownership, smart contracts, and product engineering.

Production Engineering

My work on Jokers of Neon spans the backend and onchain infrastructure behind the game:

  • TypeScript/Node.js APIs, background workers, transaction queues, scheduled jobs, payment flows, and third-party integrations.
  • Communication between frontend clients, PostgreSQL/Supabase, Torii indexers, and Cairo smart contracts.
  • Dedicated Katana and Torii deployments on AWS EC2 with Nginx, TLS, rate limiting, encrypted EBS volumes, and restricted Security Groups.
  • Performance-critical Cairo flows, including onchain caching that reduced processing time and gas usage by approximately 50%.

Browse 200+ merged PRs at Caravana Studio

Open Source

I've contributed fixes, features, tests, and developer tooling across smart contracts, backend infrastructure, and the Starknet ecosystem.

Browse 70+ merged PRs across 15+ external repositories

Contributions include work across Dojo, Beerus, Madara, Kakarot RPC, Alexandria, Yet Another Swap, and Logos C++ SDK.

Core Stack

Cairo Dojo Starknet Solidity TypeScript React Noir Garaga Three.js

Backend: TypeScript, Node.js, Java, Spring Boot, REST APIs, background workers, PostgreSQL, Supabase
Blockchain: Cairo, Starknet, Dojo, Solidity, Foundry, OpenZeppelin
Infrastructure: AWS, EC2, Nginx, Linux, GitHub Actions, Jenkins, Datadog, Kibana
Additional project experience: Rust, Noir, Garaga, Aztec, React, Three.js, Firebase, RevenueCat, AppsFlyer, Vercel, Render

Featured Work

Project Focus Stack Links
Jokers of Neon Production onchain card game with 250K+ Starknet mainnet transactions TypeScript, Node.js, Cairo, Starknet, PostgreSQL Website · Worker · App
Logos Private Balance Attestation Private balance proofs and token-gated integrations Rust, RISC Zero, Logos Repo
StarkBound 1st place at Dojo Game Jam #8; onchain artillery game Cairo, Dojo, TypeScript, React Repo · Demo
Mental Poker 1st place at RE{DEFINE}; trustless card protocol with browser-generated ZK proofs Cairo, Noir, Garaga, TypeScript Repo · Winners
Liar's Proof 1st place at Zypherpunk; privacy-preserving card game Cairo, Dojo, Noir, Garaga, TypeScript Repo · Devfolio · Demo
X402 Operator Payment and operator prototype for X Layer Arena Solidity, TypeScript, React Repo · Demo

Hackathons & Events

Since 2022, I've participated in 20+ international hackathons and ecosystem events, including in-person events in France, Mexico, Turkey, and Argentina. I've earned 11 awards or finalist placements across Starknet, Dojo, ZK gaming, and onchain application projects.

2026

2025

  • Starknet 1st place, Zypherpunk Hackathon (December) - Liar's Proof - Devfolio - Cairo Dojo Noir Garaga TypeScript
  • Starknet Argentina Starknet Startup House (Argentina)
  • Starknet 3rd place, Dojo Game Jam #7 (October) - Tomie Games
  • Starknet Starknet Grinta Sprint (August) - Starky
  • Starknet France Starknet Startup House (France, July)
  • Starknet 1st place, Starknet Winter Hackathon 2025 (January) - Jokers of Neon Mods

2024

  • Starknet 1st place, Dojo Spooky Game Jam (November) - JON x Loot Survivor Mod
  • Starknet 3rd place, Starknet Winter Hackathon (February) - Verdania
  • Avalanche Mexico 2nd place, ETH 5 de Mayo Hackathon (Mexico, February) - Paymeez

2023

  • Starknet 2nd place, Dojo Game Jam #3 (December) - Starkane
  • Starknet Turkey Finalist, Starknet Hacker House (Istanbul, November) - VAUTT Protocol
  • Starknet Dojo Game Jam #1 (October) - Wordle
  • Starknet Pragma Hackathon #1 (June) - MechaStark

2022

  • Starknet 1st place, Gaming MatchBoxDAO Hackathon #2 (October) - PathfindersAr

Demos & Media

These demos, trailers, and presentations show both the technical work and how the projects were presented:

X402 Operator demo
X402 Operator
Payment operator prototype
StarkBound demo
StarkBound
Dojo Game Jam #8 winner
Liar's Proof demo
Liar's Proof
Privacy-preserving card game
Tomie Games demo
Tomie Games
Dojo Game Jam #7 project
Jokers of Neon MOD trailer
Jokers of Neon MOD
Modding platform trailer
Jokers of Neon video
Jokers of Neon
Production game preview

Contact

Pinned Loading

  1. starkbound starkbound Public

    TypeScript

  2. dpinones/pathfinders-ar dpinones/pathfinders-ar Public

    Cairo 8

  3. liars-proof liars-proof Public

    Prove your hand fulfills conditions without reveal

    TypeScript 3 2

  4. dpinones/mental-poker dpinones/mental-poker Public

    Cairo 1

  5. tomie-games tomie-games Public

    TypeScript

  6. logos-private-balance-attestation logos-private-balance-attestation Public

    Private token balance attestation for Logos/LEZ: prove balance thresholds without revealing account identity or exact balance.

    Rust