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Sonny Castro  

Creating with code. Small details matter.

Overview

Full-Stack Developer @SAI

Full-Stack & Smart Contract Developer @AI Arena

Miami, FL, USA

Social Links

About Me

I enjoy taking products from zero to one. Over the past few years, I've built full-stack web and onchain applications using Next.js, React, and Solidity. I led development on Milady Colombia, Chonkpool, and Hypachinko, and worked on AI Arena's onchain infrastructure at ArenaX Labs. This past year, I also shipped full-stack features at SAI. I'm currently building out new ideas and open to new opportunities.

Stack

Blog

Experience

ArenaX Labs

  • Developed within a pnpm + Turborepo monorepo with Dockerized services.
  • Built APIs, endpoints, and UI flows for model submissions, leaderboard tracking, and benchmarking.
  • Optimized performance and usability to improve platform responsiveness for large-scale ML competitions.
  • Worked on SAI platform for large-scale ML competitions.
  • TypeScript
  • React
  • Next.js
  • Node.js
  • Docker
  • Turborepo
  • MongoDB
  • Tailwind CSS
  • API Development

SteakWallet (acquired by Omni)

Milady Colombia

Chonk Ecosystem

Education

Projects(4)

On-chain arcade experience on HyperEVM using vaults to reward users.

  • Designing non-custodial vaults for transparent reward accrual and distribution
  • Building lightweight mint/play flows and leaderboards
  • Focused on low-friction UX and verifiable onchain rewards
  • Live at Hypachinko
  • Solidity
  • HyperEVM
  • Vaults
  • React
  • Next.js
  • Node.js
  • Viem

Certifications(5)

Wyncode Academy – Full-Stack Web Development Bootcamp

Issued by
Wyncode Academy
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Next.js SEO Fundamentals

Issued by
Vercel
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Next.js App Router Fundamentals

Issued by
Vercel
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React Foundations for Next.js

Issued by
Vercel
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Introduction to Databases

Issued by
Meta
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