Blockchain Engineer

Building resilient blockchain experiences and infrastructure.

NFT marketplace, explorer and SDK work, built end to end.

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Identity

I build blockchain applications that hold up in production.

I'm Vincent Medina, a full-stack engineer focused on blockchain applications and infrastructure. I wrote the RPC SDK behind FiroBlocks, then built the explorer, API and infrastructure around it.

I favor simple, resilient systems, and I work with teams that need dependable backends, data pipelines and web3 integrations, from first build to deployment.

Craft

What I do.

Blockchain Infrastructure

RPC tooling, explorers and backend services for blockchain networks, deployed and maintained on Linux, Docker and Nginx.

Full-Stack Web3 Development

React and NestJS applications with wallet, marketplace and on-chain integrations, built solo from frontend to API.

Technical Consulting

Architecture and infrastructure reviews with practical guidance for teams building on blockchain.

Technical Expertise

FRONTEND

React, Vite, Next.js, TypeScript

BACKEND

NestJS, Node.js, MongoDB, Jest

Web3

Ethereum, Firo, Ethers.js, Wagmi

DevOps

Docker, Nginx, Linux, KVM, Bare Metal

Work

Selected projects.

FiroBlocks explorer showing latest blocks and transactions, with transaction types labeled Coinbase, Transparent and Spark Shield

FiroBlocks

Blockchain explorer and swap

Commissioned by the Firo Org Committee to author the Firo RPC SDK, with end-to-end test coverage, which now powers the FiroBlocks backend. Built an explorer that surfaces data others don't, including Spark/Lelantus privacy transaction classification, live network stats, masternode distribution and accurate supply figures, plus a built-in cross-chain swap. Solo end-to-end build.

React, Vite, TypeScript, NestJS, MongoDB, Docker, Linux, Nginx

Veil Art NFT marketplace home page with a featured artwork card

Veil Art

1/1 NFT marketplace · Personal project

NFT marketplace with automated transfer monitoring, live floor price calculations and collection analytics. Includes wallet connection, listing and purchase flows. Solo build across frontend, API and blockchain integrations.

React, TypeScript, NestJS, MongoDB, Ethers.js, Wagmi

Drakaria collection viewer with dragon display, detail panel and egg carousel

Drakaria

Genome-based NFT collection · Front-end and API integration

Front-end and API integration for a generative dragon collection with on-chain trait evolution. Built the breeding interface with real-time trait visualization, a genome viewer and rarity ranking.

React, TypeScript, Tailwind, Wagmi, Figma

Let's build
together.

Open to contract and consulting work on blockchain applications, infrastructure and full-stack projects.

Inquiries
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Direct
GitHub