martins87
Senior Full Stack Engineer
Senior Frontend & Web3 Engineer with 10+ years building large-scale applications and 6+ years working deeply with blockchain technologies across Ethereum, DeFi, tokenization, and Bitcoin cryptography.
I specialize in React, Next.js, TypeScript, Node.js, Solidity, ethers.js, viem, Wagmi, multisig, and cryptographic signature flows.
I have built production systems for DeFi platforms, token marketplaces, governance protocols, national identification systems, and AI-driven applications.
Currently seeking remote Senior Frontend / Full Stack / Web3 roles in U.S. or European companies (USD salaries).
Experience: 7 years
Yearly salary: $100,000
Hourly rate: $50
Nationality: 🇧🇷 Brazil
Residency: 🇳🇱 Netherlands
Experience
Full stack developer
CINESERCLA 2024 - 2025
Led the development of the company's new website and enhancing the movie ticket purchasing experience by improving page speed and implementing a modern and responsive UI with Next.js, React, TypeScript, Tailwind CSS, Zustand and shadcn.
Front-end developer
LIBERTYPAY 2024 - 2024
Led the development of the company's new website, modernizing its outdated design and improving the user experience for international money transfers by implementing a simple, modern, and responsive UI with Next.js, React, TypeScript, Tailwind CSS, Zustand and shadcn.
Front-end developer
COMMONWEALTH LABS 2023 - 2023
Contributed to the development of the company's crowdfunding and governance platform using Next.js, React, TypeScript, and CSS and showcasing React components with Storybook.
Front-end developer
ADVANCED BLOCKCHAIN 2021 - 2022
Development of the platform pages of DeFi apps such as Composable, InstrumentalFinance, Picasso, Mosaic with Next.js, React, MaterialUI and TypeScript.
Full stack developer
CIASC 2019 - 2022
Development of software solutions for the Public Security Department of the State of Santa Catarina, Brazil, including the Police Forces main system with concurrent 17,000 users. Developed and contributed to the National Identification System, which unified identification numbers across states in Brazil, reducing the risk of fraud. It allows citizens to use a single ID number (CPF) and access a digital version of their ID through a mobile app.
Full stack / Blockchain developer
ELAD 2019 - 2019
Individually developed and maintained a demo platform that facilitated the listing of real estate properties and enabled users to buy and sell fractional ownership tokens on the Blockchain. Developed using Ethereum stack (Solidity, Smart Contracts, ethersjs, Truffle, MetaMask, Remix), MongoDB, Express.js, and Node.js.
Blockchain instructor
GOBLOCKCHAIN 2017 - 2019
Taught courses on Blockchain development related to Ethereum stack (Solidity, Smart Contracts, Remix, Web3.js, Geth, MetaMask, Truffle, etc.).
Java developer
FEDERAL UNIVERSITY OF MINAS GERAIS 2011 - 2014
Collaborated with a team to develop and maintain the academic graduation system for university teachers and students, improving efficiency and user accessibility using JEE Platform, EJB3, JSE, Hibernate and Jasper Reports.
Skills
angular
javascript
nextjs
node
react
typescript
web3js
front-end
english
french
german
portuguese
spanish