● Available for new projects

Alex Rivera, Blockchain Developer

I build security-first smart contracts, elegant decentralized apps, and the Web3 infrastructure that makes digital ownership work. Backed by 4+ years and $12M in audited DeFi protocols.

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3.2k GitHub stars
50+ contracts deployed
AR

Alex Rivera

Smart Contract Engineer

S V R
Solidity
Rust
TypeScript
Go
Audit-ready code
Zero hacks
About Me

From distributed ledgers to decentralized autonomy.

My path into Web3 started with a question: how can we build systems no single entity controls? That curiosity turned into a career designing smart contracts for DeFi protocols, NFT marketplaces, and supply chain consortia.

I focus on minimal, verifiable code and rigorous testing. Every contract I ship includes a full test suite and has been audited by firms like Consensys or Trail of Bits.

I'm always exploring new primitives — account abstraction, Layer 2 rollups, zero-knowledge proofs — and I love turning those into products real people use daily.

Featured Work

Projects that ship

Decentralized Voting DApp

Solidity React Ethers.js

A secure, transparent platform ensuring immutable, auditable votes on a public ledger. Used in the 2023 DAO elections with 15,000+ ballots cast without a single dispute.

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AssetVault Marketplace

Solidity ERC-721 OpenZeppelin

A suite of audited smart contracts handling minting, listing, bidding, and sales for a digital asset marketplace. Processed $4.2M in volume in its first year with zero vulnerabilities.

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TraceChain Solutions

Hyperledger Go Chaincode

A private blockchain for tracking pharmaceuticals across a 12-country supply chain, reducing counterfeit incidents by 98% and improving recall times from days to minutes.

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Expertise

A full-stack Web3 toolkit

Blockchain & Web3
  • Public Blockchains (Ethereum, Solana)
  • Smart Contract Design & Auditing
  • Token Standards (ERC-20, ERC-721, ERC-1155)
  • Development Frameworks (Hardhat, Foundry)
  • Local Environments (Anvil, Ganache)
  • Decentralized Storage (IPFS, Arweave)
  • Web3 Libraries (ethers.js, viem)
Languages & Frameworks
  • JavaScript / TypeScript
  • Python, Go, Rust
  • Frontend Frameworks (React, Next.js, Vue)
  • Markup & Styling (HTML5, CSS3, Tailwind)
  • CSS Frameworks (Bootstrap, MUI)
Tools & Platforms
  • Version Control (Git, GitHub Actions)
  • Containerization (Docker, Kubernetes)
  • Cloud Platforms (AWS, GCP, Alchemy)
  • Crypto Wallets (MetaMask, WalletConnect)
  • Dev Environments (VS Code, Remix)
Get in Touch

Have a project in mind? Let's build

Tell me about your vision — whether it's a DeFi protocol, an NFT platform, or a permissioned blockchain for your enterprise.

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FAQ

Common questions

It depends on complexity. A standard ERC-20 contract with a minimal token logic runs between $5,000 and $15,000. For a complex DeFi protocol with custom logic, audits typically range from $25,000 to $80,000. I also offer a streamlined code review for smaller projects starting at $2,500.

I specialize in Ethereum and EVM-compatible chains (Polygon, Arbitrum, Optimism, Base). I also have production experience with Solana (Rust) and Hyperledger Fabric for enterprise use cases. For most projects, I recommend starting with an EVM chain for the richest tooling and ecosystem support.

Absolutely. I regularly work with founders on token distribution models, vesting schedules, inflationary/deflationary mechanics, and governance structures. I can produce a full tokenomics document paired with the executable smart contracts, so your token model and code are perfectly aligned.