I will your blockchain developer for smart contracts, dapps and web3

Portugal

I speak English, Portuguese

Crafting scalable solutions fueled by passion

Senior Software Engineer & Fractional CTO - 10+ years shipping scalable products for Amazon, NATO, and IBM. I take founders from idea to a launch-ready MVP - fast, without the technical debt that kill...
About this Gig

Most dApps don't fail on the idea they fail on insecure contracts, a clunky web3 frontend, or a deployment that breaks under real users. I build dApps that don't.


I'm a Senior Software Engineer and Fractional CTO with 10+ years' experience, currently CTO of Southpay, a crypto to fiat payments platform. I deliver dApps the way they should be built: secure, tested, and ready for real money and real users.


dApps I build:

 - DeFi staking, yield, vesting, escrow, swaps

 - Collectibles / NFT ERC-721/1155, minting sites, marketplaces

 - Gaming on-chain assets, rewards, play-to-earn economies

 - KYC / Identity verification, allowlists, soulbound tokens

 - Donation / Crowdfunding transparent, milestone-based fundraising

 - Custom smart contracts any EVM logic, plus review and gas optimization


Every dApp ships with audited-standard Solidity, a full test suite, a responsive web3 frontend, deployment to your chosen EVM chain, and complete documentation. You own all of it.


Not sure how to scope it? Message me before ordering I'll tell you honestly what's realistic for your budget and timeline.

Purpose:

Collectibles

DeFi

Donation/Remittances

Gaming

Programming language:

Go

Ruby

Solidity

TypeScript

React

Vyper

Expertise:

APIs

Backend

Blockchain development

Built-in payments

Keep your assets and information safe

Cryptocurrency services focus solely on developing and programming. Never share sensitive information or private keys with others.

My Portfolio