Experienced developer specializing in smart contract development, DeFi protocols, and secure decentralized applications. 6+ years of shipping production-grade code on Ethereum, Solana, and beyond.
I'm Alex Rivera, a full-stack developer with a focused specialization in blockchain technology. My journey into this field began with a fascination for the transformative potential of decentralized systems, and I've since dedicated my career to mastering smart contract development, integrating modern web technologies, and contributing to innovative ecosystems.
With experience developing on Ethereum, Solana, and Hyperledger, I've tackled complex challenges across DeFi, NFTs, and supply chain. I believe in writing clean, audited code and staying at the forefront of technology innovation — my contracts have passed audits with zero critical findings across 14 independent security reviews.
My goal is to leverage technology to create impactful solutions that empower users and redefine industries. I'm always eager to collaborate on innovative projects and contribute to the growth of the digital landscape.
A selection of production-grade applications I've designed, architected, and shipped from ideation to mainnet.
A production DApp on Ethereum implementing token swaps, liquidity pools, and yield farming mechanics. Currently securing $42M in TVL across 3 networks.
Developed audited digital asset and marketplace smart contracts for buying, selling, and auctioning NFTs. Facilitated $2.8M in total volume within the first year.
An enterprise-grade application for tracking goods provenance and ownership on an immutable ledger. Traces over 1.2M product units across 4 countries with 99.98% data integrity.
Version control, containerization, and database management for production-scale infrastructure.
"Alex is the most thorough smart contract engineer we've worked with. His code passed our audit with zero critical findings, and his architecture suggestions improved our gas efficiency by 37%."
"We hired Alex to build our NFT marketplace from scratch. He delivered ahead of schedule, communicated clearly at every step, and the launch went flawlessly with $320K in first-week volume."
"Alex's supply chain tracking proof-of-concept was so compelling that our logistics partner agreed to pilot it across three distribution centers. The transparency it creates is a genuine differentiator."
I focus on DeFi protocols, NFT marketplaces, supply chain tracking, and token engineering. Most engagements are greenfield builds or major feature expansions for teams that need deep blockchain expertise.
Every contract I write follows a strict security lifecycle: formal specification, inheritance-based defensive patterns, comprehensive unit tests (90%+ coverage), fuzz testing with Foundry, and a professional external audit before any mainnet deployment.
I work on a sprint basis (2-4 week cycles) with clear deliverables, milestones, and a shared repo from day one. Most projects run 2-4 months from kickoff to mainnet. I also offer code review and emergency security fixes on a retainer basis.
Absolutely. I regularly embed within existing product teams to accelerate delivery or lead the smart contract layer while your engineers handle the frontend and backend. I integrate with your tools, standups, and review workflows.
I typically respond within 24 hours. Let's build something that matters.