Ed Castro
Senior Software Engineer (Web3) at Renlabs
Rio de Janeiro, Brazil
Summary
👤
Senior🎓
Top SchoolEd Castro is a Senior Software Engineer based in Rio de Janeiro with four years of hands-on experience building front-end driven full-stack applications, currently focused on Web3 within the Polkadot/Substrate ecosystem. He architects and ships complex UIs and 2D/3D visualizations that translate low-level on-chain logic into intuitive user workflows, and has led senior engineering teams to establish coding standards and review processes. Prior roles include driving a greenfield React-based platform used by 10,000+ active users and leading platform rewrites to improve type safety and performance. His work has gained public visibility—featured in a Fireship video with over 1.2M views—underscoring both engineering quality and product impact. Fluent in Portuguese and experienced in cross-disciplinary UX design, he blends front-end craftsmanship with systems thinking to make agentic blockchain features approachable.
4 years of coding experience
2 years of employment as a software developer
UnicesumarCS50, Ciência da Computação, CS50, Ciência da Computação at Harvard University
English, Portuguese, Spanish
Github Skills (16)
wallet10
blockchain10
react9
polkadot9
tailwindcss9
polkadot-js9
substrate9
nextjs8
css8
tailwind8
radix7
react-component-library7
radix-ui7
shadcn-ui6
ui-components6
Programming languages (4)
Github contributions (5)
renlabs-dev/torus-ts
Feb 2025 - Apr 2025
Monorepo for the Torus Network TypesSript Ecosystem. It's managed with Turborepo and pnpm.
Contributions:21 reviews, 41 PRs, 145 pushes in 1 month
commune-ai/commune-ts
May 2024 - Dec 2024
This is a monorepo for the Commune AI typescript ecosystem. It uses Turborepo and contains the code for our web apps.
Contributions:4 reviews, 45 PRs, 307 pushes in 6 months
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